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Pee Wee Backplate Conversions - Anyone Experimenting Yet? Babe_b10
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Pee Wee Backplate Conversions - Anyone Experimenting Yet? Empty

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Pee Wee Backplate Conversions - Anyone Experimenting Yet? Empty Pee Wee Backplate Conversions - Anyone Experimenting Yet?

Post  Tee Bee on Sat Jan 11, 2020 6:44 pm

I jumped onboard and purchased some of the backplates for the Pee Wees a while back. I remember 1/2A Nut doing some testing at the time. Has anyone else done some real world testing of the setup yet, static runs or flying? Since Cox Int is selling them, surely there have been some tinkerers out there. I've been off building some electric planes and a handful of model rockets lately but am returning to the dark side of Cox-powered model construction now. Smile I'm curious to see how they are working out in the field. My latest project is a Willy Nillies Cub 250 and will have an .020 for power. Trying to decide whether I will use a TD with the large alum tank that Cox Int sells or a backplated Pee Wee with external tank. The plane is small and light enough that a Pee Wee should have plenty of oomph for it. I have a handful of unused Pee Wees lying around and most of my TD .020s are committed to other firewalls. The choice of engine setup will determine where I place the firewall during construction. Thanks.
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Post  Tee Bee on Thu Jan 16, 2020 12:02 am

Sounds quiet out there. I've moved on with the project and set up a backplated Pee Wee for the new plane. When I have more to show and tell about, I'll post up in the Models and Modeling forum.
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Post  Jason_WI on Thu Jan 16, 2020 12:17 am

Its been quiet on my end too. I can ping Bernie to see if he had any issues with these with his customer base. Usually no news is good news.
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Post  Admin on Thu Jan 16, 2020 12:22 am

I haven't had a chance to do any test runs for myself yet.

Perhaps no news is good news? Or others are like me, and just haven't gotten to running the engines yet. Especially over the winter months.


Last edited by Admin on Thu Jan 16, 2020 2:36 am; edited 2 times in total (Reason for editing : bad grammar)

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Post  Tee Bee on Thu Jan 16, 2020 1:55 am

Yep, I've been busy myself. Haven't cranked a Cox engine in months. I'm throwing caution to the wind and building a plane for this setup. What could possibly go wrong? Smile
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Post  1/2A Nut on Thu Jan 16, 2020 10:03 am

Troy your finger might get hit by the prop tongue

Yes did quite a bit of testing for carbon blend backplates .020 - .049

The Cox Killer Pee Wee RC was born impressive!
With a internal tank solid run times a rebirth of the Pee Wee!

3.8 x 3 prop / Peak 20,833 rpm with throttle
4oz thrust / 59 mph pitch speed / .040hp - 29w
1 head shim / turbo plug adapter / 25% nitro
- Carbon blend horse shoe backplate
- Large bore intake
- 128 TPI Needle valve
- Pee Wee throttle sleeve
- Tee Dee Cylinder / Piston set
- Mylar performance reed valve
- Valentine .020 bullet spinner
- Kamtechnik Turbo Plug prototype adapter
- OS P4 plug

Small Cox Logo Thumbs Up
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Post  Tee Bee on Thu Jan 16, 2020 2:00 pm

Mine just needs to chug-a-lug a little J3 Cub around the patch. Smile
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Post  smooth_bill on Thu Jan 16, 2020 4:49 pm

I'm with Jason.

Waiting for this artic weather to move on. Its only been up to 50F during the day, and all the way down to 30-40F at night! Cold  Very Happy

Turns out the Golden Years are also the Coldest Years, at least for me!

Have a backplate from Bernie, and some new Pee Wee props. A few small APC props to try as well.

Want to see how the backplate stands up to fuel and vibration, but have no doubt it will be an improvement over the FF size Pee Wee tanks.

Bill
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Post  Jim Howell on Mon Jan 20, 2020 11:00 am

smooth_bill wrote:.....

Have a backplate from Bernie, and some new Pee Wee props. A few small APC props to try as well.

Want to see how the backplate stands up to fuel and vibration, but have no doubt it will be an improvement over the FF size Pee Wee tanks.

Bill
I find this thread to be right on target for part of my current interests.  Don't know how many of you might have been infatuated with the sport FF designs of Keith Laumer.  I was!  Buttons, Little Red Twin, Twin Lizzie, Zoomerang, etc.  Anyway I have a hankering to revisit some of these.  Problem is, most of them are smaller than 36" in span, and some like Little Red Twin are down around 24".  They need something along the lines of the PeeWee for motivating power.  I have two, and I'll be getting a couple of backplates from Bernie for them 'cause having to use the integral tank mount for short run FF is a major problem for me.  I've messed up two tanks trying to drill an appropriate hole to be able to use an external tank.  I guess I'm just fumble-fingered to my dismay.  (Wish I had those two disasters back, the front parts were discarded in fury.)

Anyway, I'll be watching this thread for insights into how these backplates work.  Thanks TeeBee for starting it!
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Post  1/2A Nut on Mon Jan 20, 2020 4:10 pm

Here Jim vids to see.





2nd Cox Pee Wee with pressure tap held good rpm!
17,603 rpm / HQ 4x4.5 / 75 mph pitch speed
3.52 oz thrust / .045hp - 33w / 25% nitro

and the beast..



Cox Killer Pee Wee / 3.8x3 prop / Peak 20,833 rpm with throttle
4oz thrust / 59 mph pitch speed / .040hp - 29w
1 head shim / turbo plug adapter / 25% nitro
- Carbon blend horse shoe backplate
- Large bore intake
- 128 TPI Needle valve
- Tee Dee Cylinder / Piston set
- Mylar performance reed valve
- Valentine bullet spinner
- Kamtechnik Turbo Plug adapter
- OS P4 plug

Small Cox Logo  Thumbs Up
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Post  Jim Howell on Mon Jan 20, 2020 4:41 pm

1/2A Nut wrote:Here Jim vids to see.


2nd Cox Pee Wee with pressure tap held good rpm!
17,603 rpm / HQ 4x4.5 / 75 mph pitch speed
3.52 oz thrust / .045hp - 33w / 25% nitro

and the beast..

Cox Killer Pee Wee / 3.8x3 prop / Peak 20,833 rpm with throttle
4oz thrust / 59 mph pitch speed / .040hp - 29w
.....

Small Cox Logo  Thumbs Up

1/4A Beast FOR SURE! Thanks for sending these along.
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Post  Kim on Mon Jan 20, 2020 6:28 pm

Awright!!!! Great video !!! Got mine running today. This could be the start of something Great !!!
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Post  Tee Bee on Mon Jan 20, 2020 11:13 pm

Now we're talkin'! I'm building my Willy Nillies Cub around this setup. It will surely work out. Feeling warm and fuzzy about it. Smile
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Post  getback on Tue Jan 21, 2020 8:29 am

Hello TeeBee good to hear your on again !! I Love This Forum!
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Post  Tee Bee on Tue Jan 21, 2020 11:03 am

Oh, I've been around lurking and tinkering in the shadows. Eyebrows Got sidetracked by a couple of electric powered plane builds followed by some model rocket projects to add a little variety to this life. I'll put up some pics of my Cub on the modeling page.

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