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Cox Engine of The Month
February-2024
1/2A Nut's

"RC Speed Boat Power Drive TD .020"

More info on this engine!




PAST WINNERS
CEF Traveling Engine

Win This Engine!
Gallery


My Engine Running. Empty
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My Engine Running.

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My Engine Running. Empty My Engine Running.

Post  MauricioB Sat Oct 07, 2017 12:59 am

Many of us enjoy seeing and hearing our engines running, so I propose to generate this post among all members of CEF, showing different engines, it could be in a bench or bench, or in the model itself, specifying data of the photo, for example:
.engine brand and type
.rpm
.fuel oil
.type and size of the propeller
.others

your contribution will bring a lot of valuable data to this forum! Wink


Last edited by MauricioB on Sat Oct 07, 2017 1:58 am; edited 2 times in total
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Post  Jason_WI Sat Oct 07, 2017 1:11 am

Cox Olympic .15 rear drum valve engine. Running on Sig Champion 25% nitro, 22% oil, 8x4 APC prop.

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Post  MauricioB Sat Oct 07, 2017 1:15 am

.engine brand and type: Cox Killer Bee 1996
.rpm: 17880
.fuel oil: 20/25/55 ricino/nitro/methanol
.type and size of the propeller: Cox 5 x 3
.others: crankshaft spherical - With Throttle Ring.
My Engine Running. Dsc02728
My Engine Running. Dsc02823
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Post  Mark Boesen Sat Oct 07, 2017 9:35 am

21st century stuff, who needs a Vibra-tach!

My Engine Running. 20171010

My Engine Running. Vibra_10
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Post  Marleysky Sat Oct 07, 2017 10:47 am

Well Shoot, it don't need batteries and it fits in your  shirt pocket!!  ( pocket protector)
Looks like even the high tech tachs have a +/-  variances....yeah about 13k +/- a few hundred. lol!
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Post  1/2A Nut Sat Oct 07, 2017 3:04 pm

Most folks take cell phones where ever they go more so than a watch these days
the app is very handy. The trick is to set the rpm range close to the actual, since
we can see this engine runs in the 13k range I set the meter to 15k max rpm
by doing so you get finer resolution on the readings, here is the result. The
program has many presets to suit your engine type and rpm up to 50,000 rpm
much better than the 21k vibration gauge all the same it too was awesome sauce
for it's day!

The resolution accuracy is within 60 rpm with a single mic smart phone when the
rpm range is set correctly.

My Engine Running. 20171010
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Post  MauricioB Mon Oct 09, 2017 9:46 pm

engine brand and type: Cox Tee Dee .09
.rpm: 16500
.fuel oil: 20/25/55 ricino/nitro/methanol
.type and size of the propeller:Aviomodelli 7 x 3-1/2
.others: Throttle ring made from aluminum alloy, home - made.

My Engine Running. Foto1910
My Engine Running. Dsc02810

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Post  MauricioB Mon Oct 09, 2017 9:57 pm

engine brand and type: Cox Medallion .09
.rpm: xxxxx (the engine is in soft stage) - (first gear)
.fuel oil: 20/5 /75 ricino/nitro/methanol
.type and size of the propeller: Cox Gray 7 x 3-1 / 2
.others: throttle ring Cox, with integrated chamber and muffler.
My Engine Running. Dsc02910


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Post  MauricioB Thu Oct 12, 2017 10:09 pm

 Do not like this Post? ...Sad .... I thought it would fill up with information, maybe photos and videos of engines! I Love This Forum!
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Post  OVERLORD Fri Oct 13, 2017 7:41 am



Last edited by OVERLORD on Fri Oct 13, 2017 11:10 am; edited 1 time in total
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Post  getback Fri Oct 13, 2017 9:09 am

O my friend must not bee sad !! DAMMIT! lol!      Rolling Eyes   Laughing Laughing       lol! lol!   Eyebrows   https://www.youtube.com/watch?v=enG_IvdQvWQ  What?     silent  That's enough for noW Popcorn   And then Fall Down !! Flying
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Post  1/2A Nut Fri Oct 13, 2017 9:42 am

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Post  roddie Fri Oct 13, 2017 1:51 pm

getback wrote:O my friend must not bee sad !! DAMMIT! lol!      Rolling Eyes   Laughing Laughing       lol! lol!   Eyebrows   https://www.youtube.com/watch?v=enG_IvdQvWQ  What?     silent  That's enough for noW Popcorn    And then Fall Down !! Flying

Hey man! I never knew that you tested that muffler I sent you.. and with the pressure-line! Thumbs Up When was that? It seemed to feed fuel from that wedge pretty well.. and cool that you moved the mount around to prove it. Was it tough to start initially? It can be tricky; priming the exhaust through those muffler-pipes.. I assume that they were the wide-open pipe-sets? LOvE the speed-contest vid! Man.. that baby was SCREAMIN'!!!!!!!!
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Post  MauricioB Sat Oct 14, 2017 8:32 am

this gets good !, how many good videos to enjoy !! ..... Popcorn
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My Engine Running. Empty engine behavior

Post  MauricioB Sat Oct 14, 2017 8:39 am


beautiful bonnet or cowl, which gives a great look to the model!

Watching the engine running, from minute 0.23, the engine goes on a low let's say, but that's not normal.
Sometimes it has happened to me that when I start a engine with valve of cane that work, put in a march say "rare". This is due to excess fuel, is it due to a problem between the valve retainer and the valve itself? or exactly what happens to make it work that way ?? Huh...
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Post  Surfer_kris Sat Oct 14, 2017 10:59 am

It looks like engine goes too rich and only rocks back and forth, i.e. it never goes through TDC.

I have a few cox engine videos on youtube, guess I'll share one here, the Queen Bee with an RJL diesel head;

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Post  TDbandit Sat Oct 14, 2017 11:25 pm

Not a cox engine but I think this would be nice! Meet my ASP FT160AR four stroke twin cylinder. This is one of it's break-in runs! Prop is a 16x8 APC.




Direct link: https://www.youtube.com/watch?v=sy_E959Ozk0

And now my KK N/V equipped TD .051 showing how thirsty it is lol (Watch the syringe tube lol)



Direct link: https://www.youtube.com/watch?v=h6ohKpgPbRU&t=44s

(Bandit) RC Plane
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Post  Surfer_kris Sun Oct 15, 2017 3:22 am

Ouch, better be careful with the prop and your finger there!!!  lol!

The Norvel spring starters will fit, I twist the end and make a mating hole in the engine mount (instead of the engine lug like Norvel engines have);
My Engine Running. Img_1310

Here is short bench run of the Cox .05RC;

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Post  MauricioB Sun Oct 15, 2017 4:51 am

Cox Pee Wee .020 R/C
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Post  MauricioB Sun Oct 15, 2017 4:54 am

Cox Babe Bee .049 R/C
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Post  MauricioB Sun Oct 22, 2017 1:11 am

Eric, you're an IDOL! ... even the people who accompany you are surprised at your dominion! ... I like how you fly and I'm surprised by your incredible handling, that model looks like a demon and you always have control, that's why I say: you are a genius friend!

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Post  getback Sun Oct 22, 2017 10:04 am

JA JA JA That s funny my friend Thank You ! But ; that was the First time i had flown the plane and a TD .049 Screaming at the front end . It was for the Reed Speed of 2016 There were a few that was going to fly but i was the only entry so i WON !! Smile It was profile P51b copy home built 65.07 mph https://www.coxengineforum.com/t9334-reed-speed-2016-winner?highlight=reed+speed ( not the tank Ballon i used a sulliavn wedge .) It damn near screwed me in the ground and fell down at the end (after) of video I have not yet decided to adventure into this years event after the let down of compatition ?!?!? I envite you to the contest https://www.coxengineforum.com/t11255p25-cox-engine-forum-speed-contest-2018#143082 If you enter i will and that will work for me !?!? If you lack anything for C/L flight i probably have it and can send to you . Very Happy What ya say ? Flying
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Post  MauricioB Sun Oct 22, 2017 4:33 pm

getback wrote:JA JA JA That s funny my friend Thank You ! But ; that was the First time i had flown the plane and a TD .049 Screaming at the front end . It was for the Reed Speed of 2016 There were a few that was going to fly but i was the only entry so i WON !! Smile  It was profile P51b copy home built 65.07 mph https://www.coxengineforum.com/t9334-reed-speed-2016-winner?highlight=reed+speed ( not the tank Ballon i used a sulliavn wedge .) It damn near screwed me in the ground and fell down at the end (after) of video I have not yet decided to adventure into this years event after the let down of compatition ?!?!? I envite you to the contest https://www.coxengineforum.com/t11255p25-cox-engine-forum-speed-contest-2018#143082 If you enter i will and that will work for me !?!? If you lack anything for C/L flight i probably have it and can send to you . Very Happy  What ya say ? Flying

Friend Eric, your flight video is really good, I did not know that you had won, although you were the only participant, you see a very fast and intimidating flight !, let me congratulate you and sorry for not being aware of the news, it costs me enough to be able to follow the threads since I have to use the translator to communicate and I do not always translate everything that is exposed here!

I think that you invite me to participate, right?, Yes, I thank you infinitely, also for wanting to offer me material to be able to assemble a complete model, but I tell you; I made it to my 13 and until the 15 years U / C flight, I always used a Babe Bee .049, the models I made were a Baby Bastormer, a Falcon Hunter, a Bumblebee, a Zero, a P40 and I had a lot of fun with them, I had a single engine and passed it from model to model ... once later my father gave me a Red Devil Racer from Cox and I also vole it for a long time .... then start with the radio control, until today However, a few months ago, my friend Fabian, who was with whom we made U / C of children, offered to fly a U / C again, vole a white PT19 and a Zero of balsa wood, both with engine Babe Bee .049 , what happened to me is that I left a lot, getting to decompile, so I think I can not fly more U / C because of the effect it produces, I do not know if it is a lack of habit, but I do not rectify it.
I regret that I pass that, because I also like the U / C, but now I look at it from the outside and with admiration, MIre friend, I still keep without opening these kits U / C, they are beautiful!
Thanks Eric again !!

These two photos are from the year 1986!
My Engine Running. Scan0010

These are two kits that I have original in their boxes
My Engine Running. Aa10
My Engine Running. Aaa10
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Post  roddie Sun Oct 22, 2017 5:38 pm

A Cox .049 "Product-Engine" given to me recently by Bob (rsv1cox). This is the one that had the spray-bar installed backwards.

-ran today in N. Smithfield, RI-temperature 70 degrees F.
-horseshoe-style backplate with aluminum needle and copper-star reed
-#1 cylinder, standard glow-head w/single gasket
-APC 4.75" x 4" propeller
-Sig Champion "25" glow-fuel
-RPM unknown-couldn't get a reading with my tach

https://www.youtube.com/watch?v=fkZAZmPB_CE

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Post  1/2A Nut Sun Oct 22, 2017 5:51 pm

Can you double check that prop looks like a 5x3
Blade shape and prop hub looks like it.
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