Late Cox/Estes Prototype Parts

I don't remember seeing this before But sure is cool and i would think if someone here had them we would have heard about it I like the look of the white back plates they stand out nicely , and for .o20 reedie may even up the rpms with some mods. Cool 66 Malibu

Very cool, thanks for sharing!

I'd like to see that .020 "horseshoe" back-plate "3-D printed" by our "JasonWI" if it was possible. Maybe Steve would be willing to mail his backplate to Jason for scanning?

I don't know if Jason has 3-D scanning software.. but even if he doesn't.. he may still be able (from what I've seen..) to draw the part. I'm not implying that it would be an easy task. To the contrary; it would likely be laborious.. but the outcome would be quite beneficial to anyone who owns a Cox Pee Wee engine with plans on running it in a model. A back-plate such as this would allow the application of a larger-capacity fuel-tank for the little reed-valve engine. With today's featherweight radio-control/battery components.. one could build an amazing little airplane with extended flight-time.

The control-line applications for Cox .020 Pee Wee engines would enjoy longer engine run-times by being able to utilize external fuel tanks.. and possibly even pressure-bladders.

The only other Cox .020 "product-engine" reed-valve back-plates that I know of; came with their Ryan PT Army Trainer.. and the Sky-Copter

While I would really like one of those backplates as I have a crankcase only .020 here, I wonder about the needle assembly. Would it be an 049 needle assembly, or would those have to be made as well in a smaller size?

The needles are available https://coxengines.ca/cox-pee-wee-.020-needle-valve.html I dont think a CNC printer can make the caitive for the needle boss with the appropreate holes , and were would you get the insert anyway?

Roddie,
I saw your thoughts of maybe Jason scanning the parts for 3-D printing. If we lived near each other I would get with him and do it.
UPFRONT I'm not going to let the unit out of my possession because of all the lost and unrecovered shipments that I've had of late by UPS and USPS !!!!
Since it's all digital info anyway maybe Jason can find a way for me to scan locally and email to him.
I'm totally ignorant of the process /procedures so any help is appreciated...
Steve...

I would draw it up from a combination of the pee wee tanks, the helicopter, and Ryan back plates. Something that precise 3D scanning isn’t goint to cut it. The resolution of my scanner is .1mm. It seems small but for something that needs to seal properly that is a huge tolerance to overcome.

I don’t blame you for not sending something that rare out. I wouldn’t either.

Would love to have one of the 020 backplates...