Cox Engines Forum
You are not logged in! Please login or register.

Logged in members see NO ADVERTISEMENTS!


COX .020 POWERED SPEEDSTER - Page 5 Cox_ba12




COX .020 POWERED SPEEDSTER - Page 5 Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» **VOTE-ON-THE-NEXT-COX-ENGINE-OF-THE-MONTH** (December 2024)
by 1975 control line guy Today at 5:58 pm

» music vids.. some of your favorites
by HalfaDave Today at 5:18 pm

» EXTREMELY RARE COX THIMBLE DROME PROTOTYPE "BLACK WIDOW" GAS MODEL AIRPLANE
by a betancourt Today at 2:44 pm

» Really Nice Free Flight Video
by akjgardner Today at 10:36 am

» More Fun with the Scanner: My May '67 Issue of Model Airplane News: "The Demoiselle"
by Kim Today at 10:27 am

» Free Flight Radio Assist
by rdw777 Today at 10:25 am

» ebay Top Flight Nobler. Oh well......
by Ken Cook Yesterday at 4:08 am

» Cox control line three line throttle
by 049kid Sun Dec 08, 2024 11:35 am

» "Cox Flying School" in M.A.N. May, 1967
by Kim Sun Dec 08, 2024 6:54 am

» Automobiles you don't see everyday...
by Oldenginerod Sat Dec 07, 2024 3:44 pm

» Cox 020 PeeWee rebuild questions
by LooseSpinner99 Sat Dec 07, 2024 3:33 pm

» Tiny Glider
by rdw777 Sat Dec 07, 2024 2:37 pm

Cox Engine of The Month
November-2024
Kim's

"A Space Bug Jr. pulls the Q-Tee up high over Sky Tiger Field"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


COX .020 POWERED SPEEDSTER - Page 5 Empty
Live on Patrol


COX .020 POWERED SPEEDSTER

Page 5 of 6 Previous  1, 2, 3, 4, 5, 6  Next

Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Tue Nov 05, 2024 12:18 pm

getback wrote:lol! lol!  My monakote is at least 40 years old and still good (well it was last time ) This Site Rocks!

Watching this guy monokote .....

https://www.amazon.com/Covering-Airplanes-Step-Step-Encyclopedia/dp/0911295208

can work one of 2 ways on a guy in our hoby

It could inspire someone and teach someone how to improve their game

or

It could make someone throw their hands up and say "WHAT THE USE...I'LL NEVER BE AS GOOD AS THIS GUY...!!!" Crying or Very sad

his video[s] must be under copyright protection because I don't see any on You Tube/




TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  GallopingGhostler Tue Nov 05, 2024 12:40 pm

Book was written in 1994, 30 years ago. I was using Windows 3.1 over DOS 6. There may have been videos, rather primitive, but his videos were probably VHS tape then. We got our first cellphones in the late 1990's. This would have been texting a photo:

COX .020 POWERED SPEEDSTER - Page 5 2021-019
avatar
GallopingGhostler
Top Poster
Top Poster

2023 Supporter

Posts : 5742
Join date : 2013-07-13

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  1/2A Nut Tue Nov 05, 2024 1:52 pm

I cover the balsa and ply surfaces only after going over with fine grit and a proper wipe down with a cotton cloth.
Looking for a clean polished finish to insure best possible bond with the covering.
Proper iron temp is everything as well, can be pull separation tested tested on some prepped scarp wood.

The .09 plane had a piece of clear tape hinged at the aileron control horn and wing prior to covering to improve no
cover hinge separation over time. The constant push / pull action makes this extra step worth it with larger surfaces.
Proper full covering with no expose wood is key to avoid exhaust oils do not wick under the covering.
The small engine displacements do just fine up to 15 size engines with proper technique and covering brand / age.
Note the top surface hinge has a slight bevel induced by the iron tip ran along the crease line to establish consistent
hinge point.

COX .020 POWERED SPEEDSTER - Page 5 Hinge10

Small Cox Logo Thumbs Up
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3552
Join date : 2013-10-20
Age : 61
Location : Brad in Texas

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Tue Nov 05, 2024 3:50 pm

Well I have finished all the structural work and mechanical details.
I decided to hook up the ailerons with just .055" music wire and 1/16" aluminum tubing for the torque rod bearings and the control horns.
There must be a small weight savings vs using 2-56 threaded control wire...and once you get used to doing it this way there is much less hardware involved.

All this method has to do now is prove that it works without fail..... RC Plane

Here is a look at the WEIGHT MANAGEMENT PROGRAM

220 MAH NIMH Battery... ...............1 1/8 oz
micro 4 ch RX              ..... ..............1/8 oz
balloon tank....................................1/4 oz
50 sq inch wing with 5g servo..............1 3/8 oz
plywood fuselage w/ 5g elevator servo  2 1/2 oz....................5 3/8 ozs before 3 coats of dope and a coat of automotive urethane are applied......... Shocked

I could SWISS CHEESE the 1/32" plywood sides and recover maybe a 1/4 oz of dead weight...but some of that recovery would be given back with tissue patches.
I think putting the plane on weight loss surgery  is something that could be done after I try flying this plane at let's say  5 3/4 ozs all shiny, pretty and RTF... Cool

COX .020 POWERED SPEEDSTER - Page 5 Img_0735
COX .020 POWERED SPEEDSTER - Page 5 Img_0736
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  balogh Tue Nov 05, 2024 4:04 pm

Nice work, I like the adjustable-length aileron pushrod concept!

As a weight cut option you may want to try a 400mAh Lipo battery with a small DC to DC ramp up converter from 3.7 to 5 volts, and a Zepsus magnetic
micro-switch...the whole package stops at about 0.6 oz or so and brings extra power compared to a 220mAh NiMH battery.

COX .020 POWERED SPEEDSTER - Page 5 17308410


Last edited by balogh on Tue Nov 05, 2024 4:10 pm; edited 1 time in total
balogh
balogh
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 4975
Join date : 2011-11-06
Age : 66
Location : Budapest Hungary

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Tue Nov 05, 2024 4:06 pm

1/2A Nut wrote:I cover the balsa and ply surfaces only after going over with fine grit and a proper wipe down with a cotton cloth.
Looking for a clean polished finish to insure best possible bond with the covering.
Proper iron temp is everything as well, can be pull separation tested tested on some prepped scarp wood.

The .09 plane had a piece of clear tape hinged at the aileron control horn and wing prior to covering to improve no
cover hinge separation over time. The constant push / pull action makes this extra step worth it with larger surfaces.
Proper full covering with no expose wood is key to avoid exhaust oils do not wick under the covering.
The small engine displacements do just fine up to 15 size engines with proper technique and covering brand / age.
Note the top surface hinge has a slight bevel induced by the iron tip ran along the crease line to establish consistent
hinge point.

COX .020 POWERED SPEEDSTER - Page 5 Hinge10

Small Cox Logo Thumbs Up

Brad thanks very much for the effort you put into my education...!
There was an old German Dude at RCU known as "Der Steuermann" who spent a great deal of time getting me up to speed with the techniques and details that make a Euro Speed Cup Plane go fast.
"High Plains" at RCU was another guy who was also very generous with his time,,,he dated back to the Formula 500 days of RC Pylon that was flown at 170 mph
Joe Clause of KK and Dave Shadel of Performance Specialties were also mentors of mine who I never met in person. They just wanted to pass on what they knew to people they thought weren't a waste of their time [to be blunt about it]
Here is the plane that Der Steuermann painstakingly helped me  build from his desk in Germany to mine....  This Site Rocks!COX .020 POWERED SPEEDSTER - Page 5 Img_0739
COX .020 POWERED SPEEDSTER - Page 5 Img_0740

This is a Nelson FAI 40 engine that uses zero percent nitro and it spins a 7x7 prop 30,000 rpm for flat and level speeds of 200 mph. While converting the weight of the model to higher speed during the allowed Speed Cup dive angle this plane recorded 205 MPH.
The cost of doing this just for fun was too much for me so I hung the model up in my attic about 20 years ago.


Last edited by TD ABUSER on Tue Nov 05, 2024 4:55 pm; edited 3 times in total
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Tue Nov 05, 2024 4:39 pm

balogh wrote:Nice work, I like the adjustable-length aileron pushrod concept!

As a weight cut option you may want to try a 400mAh Lipo battery with a small DC to DC ramp up converter from 3.7 to 5 volts, and a Zepsus magnetic
micro-switch...the whole package stops at about 0.6 oz or so and brings extra power compared to a 220mAh NiMH battery.

COX .020 POWERED SPEEDSTER - Page 5 17308410
Thanks Man...!
So I will guess that the conversion from 3,7 to 5 volts only de-rates the battery from 400MAH to about 300 MAH...which is plenty of power for doing a handful of flights.... Smile
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  balogh Tue Nov 05, 2024 4:49 pm

Correct, the beauty of the small DC to DC converter is its output Voltage is adjustable with a small screw, so if your servos run on  4.8 V or even less  safely, the 400mAh on 3.7V level  goes down to 310mAh on 4.8V level or so..my Shoestring micro racer powered by a COX TEE DEE 010 and running on elevator and aileron drains about 5% from the battery  in each 10 minutes flight, so you are good and safe with such a setup for numerous flights before the battery needs recharging...I charge the 1cell LiPo from my starter box with a USB charger so I do not have to run to my car or home for some juice for my onboard battery
balogh
balogh
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 4975
Join date : 2011-11-06
Age : 66
Location : Budapest Hungary

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Tue Nov 05, 2024 5:02 pm

balogh wrote:Correct, the beauty of the small DC to DC converter is its output Voltage is adjustable with a small screw, so if your servos run on  4.8 V or even less  safely, the 400mAh on 3.7V level  goes down to 310mAh on 4.8V level or so..my Shoestring micro racer powered by a COX TEE DEE 010 and running on elevator and aileron drains about 5% from the battery  in each 10 minutes flight, so you are good and safe with such a setup for numerous flights before the battery needs recharging...I charge the 1cell LiPo from my starter box with a USB charger so I do not have to run to my car or home for some juice for my onboard battery
Thanks again...!
This is why I see the search results for variable outputs...there is a voltage selector switch. !
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  1/2A Nut Tue Nov 05, 2024 8:53 pm

"5 3/8 ozs before 3 coats of dope and a coat of automotive urethane are applied......... Shocked
I could SWISS CHEESE the 1/32" plywood sides and recover maybe a 1/4 oz of dead weight...but some of that recovery would be given back with tissue patches.
I think putting the plane on weight loss surgery  is something that could be done after I try flying this plane at let's say  5 3/4 ozs all shiny, pretty and RTF... Cool
"

Thank you sharing Chuck I enjoy chiming in results for a worthy fellow speed enthusiast!
Note the advantage of ply and spruce sq. stock is a skinny low drag / weight tough ridged fuselage able to smack the ground at full throttle.
The other big advantage is power upgrades and top speeds.

If designed right there is no need to cheese out the fuselage. Would like to upgrade the design with carbon sheet / smaller carbon square stock.

COX .020 POWERED SPEEDSTER - Page 5 Img_0713

All but the Lil Speedy is ply/spruce:

COX .020 POWERED SPEEDSTER - Page 5 Top_sp10

Small Cox Logo  Thumbs Up


Last edited by 1/2A Nut on Tue Nov 05, 2024 9:34 pm; edited 1 time in total
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3552
Join date : 2013-10-20
Age : 61
Location : Brad in Texas

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Tue Nov 05, 2024 9:04 pm

1/2A Nut wrote:"5 3/8 ozs before 3 coats of dope and a coat of automotive urethane are applied......... Shocked
I could SWISS CHEESE the 1/32" plywood sides and recover maybe a 1/4 oz of dead weight...but some of that recovery would be given back with tissue patches.
I think putting the plane on weight loss surgery  is something that could be done after I try flying this plane at let's say  5 3/4 ozs all shiny, pretty and RTF... Cool
"

Note the advantage of ply and spruce sq. stock is a skinny low drag / weight tough ridged fuselage able to smack the ground at full throttle.
The other big advantage is power upgrades and top speeds.

If designed right there is no need to cheese out the fuselage. Would like to upgrade the design with carbon sheet / smaller carbon square stock.

COX .020 POWERED SPEEDSTER - Page 5 Img_0713

All but the Lil Speedy is ply/spruce:

COX .020 POWERED SPEEDSTER - Page 5 Top_sp10

Small Cox Logo  Thumbs Up

The only way I can make that much room in my loading plan is to leave the aileron servo and linkage hanging out in the wind.


TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  1/2A Nut Tue Nov 05, 2024 9:53 pm

TD ABUSER wrote: The only way I can make that much room in my loading plan is to leave the aileron servo and linkage hanging out in the wind.

Very little in the wind if done as shown with no chance of mech loss with aluminum tube getting loose.

COX .020 POWERED SPEEDSTER - Page 5 Imag7214

COX .020 POWERED SPEEDSTER - Page 5 Imag6914

Note elevator control horn tucked inline with the fuselage / no snag landings.

COX .020 POWERED SPEEDSTER - Page 5 Vlcsna38

COX .020 POWERED SPEEDSTER - Page 5 Imag7410

Note the Nano X has two servos for redundant control.
COX .020 POWERED SPEEDSTER - Page 5 Imag8829
COX .020 POWERED SPEEDSTER - Page 5 Imag9030
COX .020 POWERED SPEEDSTER - Page 5 Vlcsna18
Small Cox Logo RC Plane
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3552
Join date : 2013-10-20
Age : 61
Location : Brad in Texas

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Tue Nov 05, 2024 10:28 pm

1/2A Nut wrote:
TD ABUSER wrote: The only way I can make that much room in my loading plan is to leave the aileron servo and linkage hanging out in the wind.

Very little in the wind if done as shown with no chance of mech loss with aluminum tube getting loose.

COX .020 POWERED SPEEDSTER - Page 5 Imag7214

COX .020 POWERED SPEEDSTER - Page 5 Imag6914

Note elevator control horn tucked inline with the fuselage / no snag landings.

COX .020 POWERED SPEEDSTER - Page 5 Vlcsna38

COX .020 POWERED SPEEDSTER - Page 5 Imag7410

Note the Nano X has two servos for redundant control.
COX .020 POWERED SPEEDSTER - Page 5 Imag8829
COX .020 POWERED SPEEDSTER - Page 5 Imag9030
COX .020 POWERED SPEEDSTER - Page 5 Vlcsna18
Small Cox Logo RC Plane

I think you are using a radio that allows you to dial back the travel volume so that you can get away with using short control horns. I'm not going to spend that sort of money on a more advanced Spektrum radio just to gain a couple MPH.
Otherwise my old FM equipment with the advanced programming features still works fine for my .40 powered stuff.
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  1/2A Nut Wed Nov 06, 2024 12:29 am

Ah fear not young grasshopper  Eyebrows
-----psssst times have changed the way to dodge computer radio  price is to buy just the transmitter / 2.4ghz RX!

A big plus with TD .010 speed projects and 4ch 2.4ghz RX are dirt cheap these days. Small Cox Logo

Examples: there are others just a quick look see...

Flysky FS-T6 6CH 2.4G LCD Transmitter with R6B Receiver Digital Radio System for RC
US $77.00!
Located in: Ontario, California, United States
COX .020 POWERED SPEEDSTER - Page 5 S-l16046

https://www.ebay.com/itm/374159140388?_skw=Flysky+FS-T6+6CH+2.4G&itmmeta=01JC03QRMJV3KD8MSENF0H87W5&hash=item571d9f6624%3Ag%3AlecAAOSwY4RgvnMj&itmprp=enc%3AAQAJAAAA0HoV3kP08IDx%2BKZ9MfhVJKnC2WdRplp2GgQumVcr4xOkJW4rgCR3PokQM8459J13Es9NbTN6pi5xEbcNIzbiPiQkc38a3urS46who54NdrRqojhdHU371DDQ9r8ji458%2F359tISOu9IA0iH6jUjGF6cEVQbk8aSq1ZlhqOw0qzrPGD3ps%2BpMsULUoCFUXKL09%2FM4iwIsShBmCnfjiQGuTiLr2OdI5b7Fti7ytVdAaXBYhBTQHerq1bnsKSXR44GYM41vxRDw3UujkdRT%2BQtMgVk%3D%7Ctkp%3ABk9SR7iK34PgZA&LH_ItemCondition=1000


US $49.49/ea
Flysky FS-i6X 2.4GHz comes with RX 16.3g
Note with the case removed the RX can be smaller and shrink rapped to 11g

COX .020 POWERED SPEEDSTER - Page 5 S-l16045


US sellers new in the box with RX!

https://www.ebay.com/itm/145661072934?_skw=RC+computer+transmitter&itmmeta=01JC01J9NDNVEQ2TY4C33XCZXA&hash=item21ea139626:g:MbIAAOSwX49l7~~o&itmprp=enc%3AAQAJAAAA8HoV3kP08IDx%2BKZ9MfhVJKlSqtevyv%2BLClmYY%2FYyxrg%2BG67zs7rJi4lzottvNcTK%2Fz2Ge%2BNI6qz%2BXsh7ROTPvKKjBF2TZtm2zKCpRJuS9YzoD%2FlzD4qk6y2sH8sesWfZSw7RrJTZyNLIkLyHKYmPISIXFa6dqwAAKo1FCEa%2BK45rsDE0w8xYNqB%2BU5eNvGxFWoMBw6p6Gxdj7oF%2F6oyh8PhtBtO7clu8X7ysYhaSCwMXYoWfXomCyL8dN9SuugTSsA3aA4WrlOEB4MtBGsw3fkgyxbYNuFgtsBgv0BhXICXrQa65RfiT7tEkAgJj7SsYzA%3D%3D%7Ctkp%3ABk9SR-yayYHgZA


Old Bugger Cool Cool
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3552
Join date : 2013-10-20
Age : 61
Location : Brad in Texas

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Wed Nov 06, 2024 3:24 am

1/2A Nut wrote:Ah fear not young grasshopper  Eyebrows
-----psssst times have changed the way to dodge computer radio  price is to buy just the transmitter / 2.4ghz RX!

A big plus with TD .010 speed projects and 4ch 2.4ghz RX are dirt cheap these days. Small Cox Logo


Old Bugger Cool Cool

Well I had no idea a "full house" radio was that cheap...!
So I couldn't resist.... Smile
None of the listings I saw went into detail about what all the programming capabilities are, so I assume it's all standard features now.
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  1/2A Nut Wed Nov 06, 2024 4:16 am

Yessah, great happy to help.
The Flysky FS-T6 6CH is very similar in features and layout as my pricey 6ch Spektrum
Noted as a digital proportional system will allow you full command of the servo throws. Eyebrows

The radio will allow you to flip switch or dial in a bit of down flap with dual servos for landing projects with ease.
COX .020 POWERED SPEEDSTER - Page 5 Vlcsna19

COX .020 POWERED SPEEDSTER - Page 5 Imag3215



Small Cox Logo Flying
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3552
Join date : 2013-10-20
Age : 61
Location : Brad in Texas

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Wed Nov 06, 2024 11:24 am

1/2A Nut wrote:

The radio will allow you to flip switch or dial in a bit of down flap with dual servos for landing projects with ease.
Small Cox Logo Flying


It's been so long since I flew 40 sized 3D with my old radio that I forgot how much fun it was to experiment with that feature inflight.
Many of the "Ugly Stick" type planes would have been much more fun with flaperons coupled to the elevator.
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  1/2A Nut Wed Nov 06, 2024 9:50 pm

Chuck do you have a TD .010, if so a computer radio will be a must have to pull off a 100+ mph speed project.  Smoking
This plane truly was a treat to construct and fly, throttle control would really be the best bet during trim flights.

The minimal servo throws for 100 mph + TD .010 and TD .020 projects is very very small.
The ailerons are like 1.5mm either way for the TD .010 plane shown, elevator 1.75mm.
Took a few trim flight throw adjustments to tame it down, a screaming wild cat until trimmed.
Long tail moment to help this feather weight 63g RTF plane have stability in the wind.

Alternatively round the pole flying with landing gear, throttle and elevator control would be fun for
those with eye sight challenges or lesser flying skills. Could do a air boat or car with the TD .010.

COX .020 POWERED SPEEDSTER - Page 5 Imag3111

COX .020 POWERED SPEEDSTER - Page 5 Amba0012

COX .020 POWERED SPEEDSTER - Page 5 Imag3216

COX .020 POWERED SPEEDSTER - Page 5 Imag2812

COX .020 POWERED SPEEDSTER - Page 5 Imag3310

COX .020 POWERED SPEEDSTER - Page 5 Imag2814



DIY aluminum throttle sleeve


Steel sleeve with aluminum backplate


Serious RPM / Best Noted Peak 33,107 rpm
91 mph pitch speed @ 32K




Small Cox Logo RC Plane


Last edited by 1/2A Nut on Wed Nov 06, 2024 10:57 pm; edited 2 times in total
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3552
Join date : 2013-10-20
Age : 61
Location : Brad in Texas

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Wed Nov 06, 2024 10:50 pm

No .010 for me. I will Draw the line at .020.

I've got too many engines that haven't seen the light of day in the last several years that I need to get some use out of.
Of course I'll need to join the local club to run the bigger ones.

No doubt your .010 plane will be the most critical to get dialed in and to keep dialed in.
Taking notes would be the only way I could keep multiple critical models straight.
Somewhere I've read about taping the outboard end of the ailerons to be stationary to tame them.
One thing that's easy to overlook is lateral balancing planes.
Here's one I forgot to do that with.... Laughing



TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  1/2A Nut Thu Nov 07, 2024 5:00 pm

Yes that was a good save Chuck!
Offset for prop torque is another needed trick, the speed props are smaller in dia, but the
extreme rpm does kick the left wing down in a heartbeat at launch.
Took 3 trim flights to hone in the .010 control throws with a tame 2.56x3 prop.

Small Cox Logo RC Plane
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3552
Join date : 2013-10-20
Age : 61
Location : Brad in Texas

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Thu Nov 07, 2024 6:34 pm

1/2A Nut wrote:Yes that was a good save Chuck!
Offset for prop torque is another needed trick, the speed props are smaller in dia, but the
extreme rpm does kick the left wing down in a heartbeat at launch.
Took 3 trim flights to hone in the .010 control throws with a tame 2.56x3 prop.

Small Cox Logo RC Plane

To be honest I DIDN'T SAVE IT...!!!  Smile

It just saved itself while I watched..! Laughing

I hate the idea of using offset thrust...the best advice I ever read was to put in a tiny bit of right,,just to be sure you don't have a tiny bit of left.
I think the best medicine is to be ready for a torque roll to happen at launch and then just enjoy the rest of the flight.
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Thu Nov 07, 2024 10:10 pm

Another plane is born..... Smile
This one ended up 5 1/4 ozs

I've got a 3.7v to 5v Lipo system on order that will reduce weight.
Another thing in the works is a smaller balloon tank...made from a small nitrile glove finger
Having a smaller loading plan should allow for a more compact fuselage.
I don't see why the next fuselage cant be made entirely out of 1/64" plywood too.
So while having coffee tomorrow I'll rework a couple 3 pitch props just in case this plane does well with the 2 pitch "trainer" prop.
I've looked everywhere for my Great Planes axle style prop balancer......except where it is hiding.COX .020 POWERED SPEEDSTER - Page 5 Img_0741
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  1/2A Nut Thu Nov 07, 2024 11:09 pm

Fun stuff, looks like this one is due for some enjoyable flights indeed!

Look forward to your feedback / vid with a modified APC props!

COX .020 POWERED SPEEDSTER - Page 5 Lpb04010

COX .020 POWERED SPEEDSTER - Page 5 20201020

Less connections / devices and weight:
COX .020 POWERED SPEEDSTER - Page 5 150vs811

Speed
COX .020 POWERED SPEEDSTER - Page 5 Imag8224

Ebay boat prop balancer:
COX .020 POWERED SPEEDSTER - Page 5 Imag6711


TD style lean n mean speed designs
COX .020 POWERED SPEEDSTER - Page 5 Resize39

COX .020 POWERED SPEEDSTER - Page 5 Micro_12

Small Cox Logo Thumbs Up
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3552
Join date : 2013-10-20
Age : 61
Location : Brad in Texas

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  TD ABUSER Fri Nov 08, 2024 12:21 am

Thanks for the look at your go fast stuff...!

I found some 1/3 AAA nimh cells to make a pack with...but LIFE packs under 300 ma are hard to find.
Now I just have to find the wall wart charger I set up for 15ma output.
That prop balancer you show looks just right... Cool

TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 418
Join date : 2020-11-01
Age : 69
Location : Washington

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  1/2A Nut Fri Nov 08, 2024 2:15 am

LIFE batteries are out there it's a matter of where and when. I snagged enough while the getting was good before
vendor stock was not as obvious to find. Micro RC cars use them / micro solar lights use them dog / cat GPS.
Overseas folks are still keen to race micro cars.

6.6V 220mAh LiFe Receiver Pack - DYN1418
In stock
Brand: Dynamite
6.6V 220mAh LiFe Receiver Pack
https://www.hobbycorner.co.nz/product/6.6v-220mah-life-receiver-pack/dyn1418.aspx


https://www.amazon.com/dp/B0CR6H96GN/ref=sspa_dk_hqp_detail_aax_0?sp_csd=d2lkZ2V0TmFtZT1zcF9ocXBfc2hhcmVk&th=1
Product description
Brand: Dynamite
Description: 4.8V 220mAh 2/3AAANiMH 4C Flat: Micro SCT, Rally
SKU/Part #: DYNB0007
UPC: 605482588789

Small Cox Logo  Thumbs Up
1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3552
Join date : 2013-10-20
Age : 61
Location : Brad in Texas

Back to top Go down

COX .020 POWERED SPEEDSTER - Page 5 Empty Re: COX .020 POWERED SPEEDSTER

Post  Sponsored content


Sponsored content


Back to top Go down

Page 5 of 6 Previous  1, 2, 3, 4, 5, 6  Next

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum