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April-2021
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Finely polished Cox .049 with exhaust collector.




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CEF .020 Horseshoe Backplate

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SOLD! CEF .020 Horseshoe Backplate

Post  Admin Thu Sep 19, 2019 5:54 am

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 Sun Nov 24, 2019 6:32 am; edited 7 times in total

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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Marleysky Thu Sep 19, 2019 6:05 am

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

Post  balogh Thu Sep 19, 2019 6:21 am

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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  dckrsn Thu Sep 19, 2019 7:02 am

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

Post  1/2A Nut Thu Sep 19, 2019 8:23 am

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 Thu Sep 19, 2019 8:32 am; edited 1 time in total
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SOLD! Re: CEF .020 Horseshoe Backplate

Post  1/2A Nut Thu Sep 19, 2019 8:25 am

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

Post  Admin Thu Sep 19, 2019 9:03 am

The first orders are being processed!

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SOLD! Re: CEF .020 Horseshoe Backplate

Post  GUS THE I.A. Thu Sep 19, 2019 10:20 am

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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  944_Jim Thu Sep 19, 2019 1:01 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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Jason_WI Thu Sep 19, 2019 1:52 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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Levent Suberk Thu Sep 19, 2019 4:14 pm

Very good idea, very good work Very Happy
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SOLD! Re: CEF .020 Horseshoe Backplate

Post  getback Thu Sep 19, 2019 10:11 pm

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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  944_Jim Fri Sep 20, 2019 8:49 am

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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Admin Fri Sep 20, 2019 8:55 am

@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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  944_Jim Fri Sep 20, 2019 10:19 am

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

Thanks much.

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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Kim Fri Sep 20, 2019 10:55 am

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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Jason_WI Fri Sep 20, 2019 11:00 am

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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Admin Fri Sep 20, 2019 12:09 pm

We're down to 9 left.

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SOLD! Re: CEF .020 Horseshoe Backplate

Post  944_Jim Fri Sep 20, 2019 12:54 pm

Jason,

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

Thanks,
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SOLD! Re: CEF .020 Horseshoe Backplate

Post  getback Sat Sep 21, 2019 12:14 am

Don't forget those other goodies in there too , got myself some wings already have two shirts Eyebrows
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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Admin Sat Sep 21, 2019 2:44 am

7 left! Eyebrows


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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Cox International Sat Sep 21, 2019 6:05 am

@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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Admin Sat Sep 21, 2019 6:18 am

@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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Jason_WI Sat Sep 21, 2019 7:28 am

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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SOLD! Re: CEF .020 Horseshoe Backplate

Post  Cox International Sat Sep 21, 2019 7:40 am

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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