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

Logged in members see NO ADVERTISEMENTS!


Cox PeeWee Micro Speeder - Page 4 Cox_ba12




Cox PeeWee Micro Speeder - Page 4 Pixel

Log in

I forgot my password

Search
 
 

Display results as :
 


Rechercher Advanced Search

Latest topics
» So to the rescue of an EZ BEE .049 r/c
by MauricioB Today at 4:31 pm

» Sturdi Built?
by rsv1cox Today at 3:04 pm

» Hello guy's. So tell me about AP 061? Any tips and any issue I might go through?
by Surfer_kris Today at 12:00 pm

» Introducing our Cox .049 TD Engines
by sosam117 Today at 7:32 am

» Choke Tube "stuff"...
by roddie Yesterday at 7:15 pm

» Vintage Vornado fan project
by rsv1cox Yesterday at 8:00 am

» Kofuku Maru Fishing Boat Model
by getback Yesterday at 7:14 am

» Leufortin Project
by Levent Suberk Yesterday at 6:39 am

» Cox PT-19 Wing
by getback Thu Jul 18, 2024 11:57 am

» My Cox .049 Marine inboard engine
by F4D Phantom II Wed Jul 17, 2024 7:03 pm

» Jim Walker "Firebrand"...It Flys !!!!!
by 944_Jim Tue Jul 16, 2024 8:45 pm

» The "Funky Bee"
by rsv1cox Tue Jul 16, 2024 9:39 am

Cox Engine of The Month
July-2024
robot797's

"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"



PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


Cox PeeWee Micro Speeder - Page 4 Empty
Live on Patrol


Cox PeeWee Micro Speeder

Page 4 of 4 Previous  1, 2, 3, 4

Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Tobaiies Sun Jul 17, 2022 6:29 am

haha, yeah, I'm getting a little scared too. Paranoid  Clapping
I'll test it today Hand Shake
Tobaiies
Tobaiies
Silver Member
Silver Member

Posts : 80
Join date : 2020-10-30
Age : 22

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  1/2A Nut Sun Jul 17, 2022 11:55 am

Yes per prop pitch speed 177 kmh / 110 mph in a pass.

- down wind pass can exceed prop pitch speed on a windy day
- diving and leveling off quick can give a brief gps reading of 222 kmh

The plane only needs to fly forward at 222 kmh for a brief moment to gain a locked in peak reading.
To get closer to actual ground speed the plane would have to dive less to avoid spiked readings.
A circuit pattern with high top steady shallow dive that keeps the peak rpm up right as it passes the camera.

Can try full length prop to retain some thrust - N reduce the wider prop tips to pick up much needed rpm.
Consider profiling the airfoil after back cut the trailing edge should be reshaped into a airfoil's trailing edge.
The blades are like wings - as a experimental effort a bit of washout sanded in / may improve tip pitch / stability.

Cox PeeWee Micro Speeder - Page 4 9b5ea810


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

Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Tobaiies Sun Jul 17, 2022 3:29 pm

Here are a few flights and comparisons from today, think a little faster again. RC Plane Smile
Tobaiies
Tobaiies
Silver Member
Silver Member

Posts : 80
Join date : 2020-10-30
Age : 22

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  1/2A Nut Sun Jul 17, 2022 5:05 pm

Yes much better results the prop work is paying off! Thumbs Up
Did you get GPS readings?

Flying

Tach rpm readings / prop pitch speed:
?x4.1N - 29,392 @ 1.02 mins. / 114 mph - 183.5 kph
?x4.7N - 27,051 @ 2.02 mins. / 120 mph - 193 kph
?x3N - 31,573 @ 5.48 mins. / 90 mph - 145 kph
4x3 - 28,667 / 81 mph - 130 kph

Best vid yet Popcorn

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

Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  balogh Mon Jul 18, 2022 6:22 am

1/2A Nut wrote:
balogh wrote:Brad I have only the COX 2 bladed props for 020 size engines (my APC-s are larger)  that the TD spins way slower than the 3-bladed. So my benchmark is set by the 3-bladed and I compare the heads using that prop only.


Try 1 shim for more rpm  Cool

The adapter was set up and tested for the more widely used Cox 4.5x2 prop.
The compression was adjusted to serve with one head shim as many folks
may not have spare shims to add.

Absolutely did not give up or settle with numerous prototypes tested until the adapter
was honed to make more rpm than stock. Same engine and prop saved for only testing.  


Small Cox Logo  Thumbs Up

Thanks for the tip on hot plug, Brad, I swapped my medium hot with a hot one and with 1 shim only, and the rpm has clearly improved. It may be somewhere where the stock COX head runs it i.e. 24k on the ground with 20% nitro and the 3 bladed COX prop. I will continue the exercise with some 2-bladed props too...
balogh
balogh
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 4800
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  1/2A Nut Mon Jul 18, 2022 12:48 pm

Good to hear the prop loading of the 3 blade has woke up with 1 head shim and hotter plug.

Did you oil the glow plug threads and seat area prior to install?

Med. plug would be good and robust for high nitro above 35% +


Popcorn

1/2A Nut
1/2A Nut
Top Poster
Top Poster

Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  balogh Mon Jul 18, 2022 3:28 pm

Thanks. Brad, I always make sure head and plug seal perfectly..
balogh
balogh
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 4800
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Mark Boesen Tue Jul 19, 2022 10:42 pm

This was a 'thing' back in the 1/2a pylon days using the Cox grey Competition props!



1/2A Nut wrote:Yes per prop pitch speed 177 kmh / 110 mph in a pass.

- down wind pass can exceed prop pitch speed on a windy day
- diving and leveling off quick can give a brief gps reading of 222 kmh

The plane only needs to fly forward at 222 kmh for a brief moment to gain a locked in peak reading.
To get closer to actual ground speed the plane would have to dive less to avoid spiked readings.
A circuit pattern with high top steady shallow dive that keeps the peak rpm up right as it passes the camera.

Can try full length prop to retain some thrust - N reduce the wider prop tips to pick up much needed rpm.
Consider profiling the airfoil after back cut the trailing edge should be reshaped into a airfoil's trailing edge.
The blades are like wings - as a experimental effort a bit of washout sanded in / may improve tip pitch / stability.

Cox PeeWee Micro Speeder - Page 4 9b5ea810


Small Cox Logo Thumbs Up
Mark Boesen
Mark Boesen
Top Poster
Top Poster

Posts : 3978
Join date : 2011-09-01
Age : 66
Location : Rockford, Il

http://groups.yahoo.com/group/049Collectors/

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Time for V4

Post  Tobaiies Fri Dec 16, 2022 4:30 pm

Today I started building the fourth generation.
First I sketched the parts, everything is a little smaller. The wing moves slightly forward to improve the center of gravity, while the tail is slightly longer to further increase stability. The fuselage is narrower again, I hope I can pack everything I need in it Laughing Cox PeeWee Micro Speeder - Page 4 Whatsa10
Cox PeeWee Micro Speeder - Page 4 210
After that I pretty much did everything as usual.
Cox PeeWee Micro Speeder - Page 4 310
Cox PeeWee Micro Speeder - Page 4 410
Cox PeeWee Micro Speeder - Page 4 610
Cox PeeWee Micro Speeder - Page 4 710
Cox PeeWee Micro Speeder - Page 4 810
Cox PeeWee Micro Speeder - Page 4 910
Before I can install anything in the fuselage, I need to make the wing to see where I have room to install the servo Huh...
Tobaiies
Tobaiies
Silver Member
Silver Member

Posts : 80
Join date : 2020-10-30
Age : 22

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Tobaiies Sat Dec 17, 2022 9:51 am

I've made some progress.
The wing is now only made of 3mm balsa, but is still very stable.
Cox PeeWee Micro Speeder - Page 4 Image024
Cox PeeWee Micro Speeder - Page 4 Image022
Cox PeeWee Micro Speeder - Page 4 Image023
Cox PeeWee Micro Speeder - Page 4 Image027
Cox PeeWee Micro Speeder - Page 4 Image025
Cox PeeWee Micro Speeder - Page 4 Image026
Cox PeeWee Micro Speeder - Page 4 Image028
Cox PeeWee Micro Speeder - Page 4 Image029
Cox PeeWee Micro Speeder - Page 4 Image030
Now only the linkages are missing. I hope the receiver and the battery will have enough space Laughing
Tobaiies
Tobaiies
Silver Member
Silver Member

Posts : 80
Join date : 2020-10-30
Age : 22

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  balogh Sat Dec 17, 2022 9:56 am

Do you sand an airfoil into the 3mm thick wing, or just leave it as a flat board and set the aspect ratio to a few degrees??
balogh
balogh
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 4800
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Tobaiies Sat Dec 17, 2022 10:01 am

balogh wrote:Do you sand an airfoil into the 3mm thick wing, or just leave it as a flat board and set the aspect ratio to a few degrees??
Yes, I sanded a profile
You just have to make sure that it's sanded evenly everywhere.
Tobaiies
Tobaiies
Silver Member
Silver Member

Posts : 80
Join date : 2020-10-30
Age : 22

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  1/2A Nut Sat Dec 17, 2022 1:49 pm

RC Plane

Looks great Tobaiies, should provide improved performance!
Fast work getting this one built up quickly for all to see and enjoy.

Taking the overview photo can resize / shape the project and reveal a faster plane. Flying

Cox PeeWee Micro Speeder - Page 4 Imvcxa10


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

Posts : 3464
Join date : 2013-10-20
Age : 60
Location : Brad in Texas

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  TD ABUSER Sat Dec 17, 2022 2:45 pm

Tobaiies wrote:I've made some progress.
The wing is now only made of 3mm balsa, but is still very stable.

I really like this design and all the progress you have made.
A couple of these planes would be fun to race on a 150 foot course with 2 poles.
TD ABUSER
TD ABUSER
Gold Member
Gold Member

Posts : 179
Join date : 2020-11-01
Age : 68
Location : Washington

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Tobaiies Sat Dec 17, 2022 2:47 pm

thank you! I'm done, The RTF weight is 83 grams. Saved about 10% to the previous version.
I'm curious how the flight characteristics will change.

Fortunately, the space is not a problem, even better than before, the center of gravity is also easily adjustable.Cox PeeWee Micro Speeder - Page 4 3072e910Cox PeeWee Micro Speeder - Page 4 75647710
Tobaiies
Tobaiies
Silver Member
Silver Member

Posts : 80
Join date : 2020-10-30
Age : 22

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Tobaiies Sat Dec 17, 2022 2:50 pm

TD ABUSER wrote:
Tobaiies wrote:I've made some progress.
The wing is now only made of 3mm balsa, but is still very stable.

I really like this design and all the progress you have made.
A couple of these planes would be fun to race on a 150 foot course with 2 poles.
yes that would be awesome! RC Plane Very Happy
Tobaiies
Tobaiies
Silver Member
Silver Member

Posts : 80
Join date : 2020-10-30
Age : 22

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  balogh Sat Dec 17, 2022 6:25 pm

I see you use LiPo battery? What is the voltage and capacity in mAh? Do you need a voltage regulator to step its voltage down for the servos?
balogh
balogh
Top Poster
Top Poster

2022 Supporter

2023 Supporter

Posts : 4800
Join date : 2011-11-06
Age : 65
Location : Budapest Hungary

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  rdw777 Sat Dec 17, 2022 6:38 pm

Very nice planning and building Tobaiies!!!! I’m sure it will be very speedy and will be looking forward to the video….Please share what servos and receiver you are using as well if you don’t mind….Good luck with first flights !!!
rdw777
rdw777
Diamond Member
Diamond Member

2022 Supporter

2023 Supporter

2024 Supporter

Posts : 1461
Join date : 2021-03-11
Location : West Texas

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Tobaiies Sun Dec 18, 2022 5:49 am

balogh wrote:I see you use LiPo battery? What is the voltage and capacity in mAh? Do you need a voltage regulator to step its voltage down for the servos?
Its a 1S 3,7 Volt 240mAh LiPo from a little drone. With this i can directly go to the receiver and the servos.Cox PeeWee Micro Speeder - Page 4 75b16710
Tobaiies
Tobaiies
Silver Member
Silver Member

Posts : 80
Join date : 2020-10-30
Age : 22

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Tobaiies Sun Dec 18, 2022 5:54 am

rdw777 wrote:Very nice planning and building Tobaiies!!!! I’m sure it will be very speedy and will be looking forward to the video….Please share what servos and receiver you are using as well if you don’t mind….Good luck with first flights !!!
Thanks! I think it will be a while before the first flight. Sad
I'm using 3.5 gram servos from an old E-flite model and a Futaba R3004SB receiver.
Tobaiies
Tobaiies
Silver Member
Silver Member

Posts : 80
Join date : 2020-10-30
Age : 22

Back to top Go down

Cox PeeWee Micro Speeder - Page 4 Empty Re: Cox PeeWee Micro Speeder

Post  Sponsored content


Sponsored content


Back to top Go down

Page 4 of 4 Previous  1, 2, 3, 4

Back to top


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