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CEF .020 Horseshoe Backplate Babe_b10
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Cox Engine of The Month
October-2019
colibriguitars's

Dieselized .049 with no Teflon disk or o-rings.

More info on this engine!



PAST WINNERS
CEF Traveling Engine

Win This Engine!
The Traveling Prop
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CEF .020 Horseshoe Backplate Empty
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CEF .020 Horseshoe Backplate

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For Sale CEF .020 Horseshoe Backplate

Post  Admin on Wed Sep 18, 2019 2:54 pm

Exclusive CEF 2019 .020 Horseshoe Backplate
CEF .020 Horseshoe Backplate 5ac4f510
.020 front end and needle valve assembly not included, shown for demonstration purposes only

Ever wished you could mount your Pee Wee .020 like a Killer Bee or SureStart? Ever wanted to use an external tank for longer run times? Need another conversation piece (who doesn't)?

Designed and produced by longtime forum member Jason_WI (Jason Birnschein). More than seven months of development and testing. 3D printed from DuPont carbon fiber reinforced Zytel, withstanding temperatures up to 150°C. Each backplate was hand finished and carefully inspected.

Includes: reed, retainer, crankcase gasket, crankcase screws, and mounting screws. Does NOT include a needle valve assembly! Requires a 128 TPI needle valve assembly sourced from a .049 "postage stamp" backplate. For best results and the ease of tuning, using an 80 TPI needle valve assembly supplied with the SureStart and other horseshoe backplate product engines is not recommended.  Arrow Update: With further testing, a short stem 80 TPI needle did produce satisfactory results. See this post for more information: https://www.coxengineforum.com/t13351p25-cef-020-horseshoe-backplate#172040



Click on images to view larger



Note on needle valves: For the ease of tuning and best stability, a 128 TPI needle valve assembly will be desired. This must be supplied by the modeler and is not included with the backplate. These needle valves are most commonly found in early "postage stamp" product engines. Below is a picture showing the difference between a 80 TPI (right) and 128 TPI (left) needle.  Arrow Update: With further testing, a short stem 80 TPI needle did produce satisfactory results. See this post for more information: https://www.coxengineforum.com/t13351p25-cef-020-horseshoe-backplate#172040



Watch it in action!


Price for each backplate is only $15 with FREE shipping!*  
SOLD OUT
All proceeds go towards funding CEF.

Limited quantity available! Only 25 produced!

CEF .020 Horseshoe Backplate Btn_bu10

*Free shipping for US addresses only.  Please contact for international shipping.



Last edited by Admin on Sat Sep 28, 2019 3:00 pm; edited 6 times in total

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For Sale Re: CEF .020 Horseshoe Backplate

Post  Marleysky on Wed Sep 18, 2019 3:05 pm

Whoot! whoot! Order/payment sent! Too Cool! Small Cox Logo
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For Sale Re: CEF .020 Horseshoe Backplate

Post  balogh on Wed Sep 18, 2019 3:21 pm

Beautiful piece of work!! If I had no radial mounts for my TeeDee020-s I would certainly buy some no matter the shipping distance and customs duties..
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For Sale Re: CEF .020 Horseshoe Backplate

Post  dckrsn on Wed Sep 18, 2019 4:02 pm

Beautiful work. Didn't want to be greedy, so I
ordered just one.
Thanks,
Bob
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For Sale Re: CEF .020 Horseshoe Backplate

Post  1/2A Nut on Wed Sep 18, 2019 5:23 pm

Great thank you!

I will convert one of my Pee Wee engines to use this horseshoe backpate
look forward to running up the engine!

Per vid:
Peak 17,280 rpm and 16,876 rpm at the end of the vid, what size prop used?

Receipt number: 19H02642MK437240D

Thank you,

Brad

Small Cox Logo Thumbs Up


Last edited by 1/2A Nut on Wed Sep 18, 2019 5:32 pm; edited 1 time in total
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For Sale Re: CEF .020 Horseshoe Backplate

Post  1/2A Nut on Wed Sep 18, 2019 5:25 pm

Balogh this is for Pee Wee engines not TD's
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For Sale Re: CEF .020 Horseshoe Backplate

Post  Admin on Wed Sep 18, 2019 6:03 pm

The first orders are being processed!

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For Sale Re: CEF .020 Horseshoe Backplate

Post  GUS THE I.A. on Wed Sep 18, 2019 7:20 pm

WOW! Most of my Free Flight models are PeeWee .020 powered, so this would be ideal for them! I must find a way to order and pay for them. 25 units will sell quickly.
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For Sale Re: CEF .020 Horseshoe Backplate

Post  944_Jim on Wed Sep 18, 2019 10:01 pm

Y'all know I'm a sucker for twins. Would it be obnoxious to order two? I'll wait a bit...but if they don't sell fast, I'm hoping to take the last two.
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For Sale Re: CEF .020 Horseshoe Backplate

Post  Jason_WI on Wed Sep 18, 2019 10:52 pm

944_Jim wrote:Y'all know I'm a sucker for twins. Would it be obnoxious to order two? I'll wait a bit...but if they don't sell fast, I'm hoping to take the last two.

Nope, order away!
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Post  Levent Suberk on Thu Sep 19, 2019 1:14 am

Very good idea, very good work Very Happy
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For Sale Re: CEF .020 Horseshoe Backplate

Post  getback on Thu Sep 19, 2019 7:11 am

Hot Darn I am in for a couple for this forums support !! Thanks Jason and Jacob !! Small Cox Logo Very Happy
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For Sale Re: CEF .020 Horseshoe Backplate

Post  944_Jim on Thu Sep 19, 2019 5:49 pm

Ok...I'm in for two.

I feel like such a dummy! Who/how do I make payment for my two?
PayPal ok?

Thanks in advance,
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Post  Admin on Thu Sep 19, 2019 5:55 pm

944_Jim wrote:Ok...I'm in for two.

I feel like such a dummy! Who/how do I make payment for my two?
PayPal ok?

Thanks in advance,

Through the forum store: https://www.coxengineforum.com/h30-forum-store

Simply add to cart, set qty to 2, and check out. PayPal or credit card.

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Post  944_Jim on Thu Sep 19, 2019 7:19 pm

(Evil cackle) "Mwuah-haha...two are mine. All mine!"

Thanks much.

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Post  Kim on Thu Sep 19, 2019 7:55 pm

Got one coming my ways also! Will swoop back in if any orphans are left---not counting on that though!

Thanks Guys !!!!
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For Sale Re: CEF .020 Horseshoe Backplate

Post  Jason_WI on Thu Sep 19, 2019 8:00 pm

11 left.

On the last ten I’m waiting for the spray bar seals to come in from Cox International so there may be a slight delay in getting them out. If you don't need the seal just add that to the comments when you place your order and the backplate will ship right away.

This is what I’m waiting for:

https://coxengines.ca/cox-.049-.074-spray-bar-seal-10.html


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Post  Admin on Thu Sep 19, 2019 9:09 pm

We're down to 9 left.

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Post  944_Jim on Thu Sep 19, 2019 9:54 pm

Jason,

I'll need the seals. I'm in no rush. Mine can go out later

Thanks,
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Post  getback on Fri Sep 20, 2019 9:14 am

Don't forget those other goodies in there too , got myself some wings already have two shirts Eyebrows
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Post  Admin on Fri Sep 20, 2019 11:44 am

7 left! Eyebrows


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Post  Cox International on Fri Sep 20, 2019 3:05 pm

Jason_WI wrote:11 left.

On the last ten I’m waiting for the spray bar seals to come in from Cox International so there may be a slight delay in getting them out. If you don't need the seal just add that to the comments when you place your order and the backplate will ship right away.

This is what I’m waiting for:

https://coxengines.ca/cox-.049-.074-spray-bar-seal-10.html



Where will all the 128TPI needles be coming from lol; they are not an easy find and we ran out of stock a long time ago.

Will they really not work with the "Surestart" spraybars/needles? We have 1,000's of those spraybars and needles and could take at least 50 backplates (only the plastic part) as we have all the other bits. We also have lots of Babe Nee spraybars and needle valves.
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For Sale Re: CEF .020 Horseshoe Backplate

Post  Admin on Fri Sep 20, 2019 3:18 pm

Cox International wrote:
Where will all the 128TPI needles be coming from lol; they are not an easy find and we ran out of stock a long time ago.

Will they really not work with the "Surestart" spraybars/needles?

As of right now the buyers will have to extract the NVA from an old postage stamp backplate if they don't already happen to have any loose...

I haven't had a chance to do test runs for myself, but it appears that the engine becomes too "touchy" and difficult to tune when used with a 80 TPI needle. I'll let Jason answer this one.

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For Sale Re: CEF .020 Horseshoe Backplate

Post  Jason_WI on Fri Sep 20, 2019 4:28 pm

This is the 80 TPI run video from the development thread of the backplate.

I wanted to see if it would run with an 80 TPI NVA from a sure start backplate. It runs but the needle setting is very touchy which is expected. Same prop and fuel as previous runs.



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Post  Cox International on Fri Sep 20, 2019 4:40 pm

Hm, not too bad ….

Perhaps a Babe Bee needle & spring will fare better? If you are interested, let's touch base next week to see if we can work something out.

Interestingly, we have OEM Cox drawings for a .020 Die Cast Surestart engine that Cox was working on but never went into production.

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