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Converting a broken up PeeWee to a TD .020 Cox_ba12




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Converting a broken up PeeWee to a TD .020 Pixel

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Converting a broken up PeeWee to a TD .020

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Converting a broken up PeeWee to a TD .020 Empty Converting a broken up PeeWee to a TD .020

Post  Jason_WI Thu Feb 15, 2018 10:50 pm

So you have a busted up PeeWee .020 that either has a broken crank or broken backplate. What to do with the good piston/cylinder? PeeWee parts bring a premium on eBay. I have seen NOS PeeWee tank kits sell for as much as a used TD .020. Crankshafts bring a premium too.

Converting a broken up PeeWee to a TD .020 D4cd7a10


Matt at EX Model Engines has new production parts for the TD .020. You can get an entire lower end with aluminum carb body or buy the parts seperate if you are going to use the plastic carb bodies and tank from MECOA. I chose the latter to keep the original look.

Here are the parts out of the bags. I had a new glow head and spring starter on hand. The carb body is NOS and the tank is from MECOA. The thin wall piston/cylinder is from a broken up PeeWee. The rest of the parts are from Matt.

Converting a broken up PeeWee to a TD .020 3811af10


A few minutes later it’s all assembled. Put the piston/cylinder to some good use.

Converting a broken up PeeWee to a TD .020 D56e1210


Can sell or trade the good PeeWee parts to recoup some cost.

Maybe we could convince Matt to make aluminum backplates for the TD .020 then all parts could be sourced from him less the piston/cylinder.
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Post  MauricioB Fri Feb 16, 2018 2:55 am

Hello Jason, I have armed three Tee Dee .020 two of them put acceleration ring.
The parts are:
Back plate and acceleration ring: own manufacture.
Cylinder, piston and connecting rod: Select Hobbies
Rest: Ex Model Engines
Converting a broken up PeeWee to a TD .020 Dsc03310
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Post  EXModelEngines Fri Feb 16, 2018 7:25 am

Looks great guys!

Hoping to finalize a design for an aluminum fuel tank on the 020 Tee Dee soon.

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Post  MauricioB Fri Feb 16, 2018 8:49 am

EXModelEngines wrote:Looks great guys!

Hoping to finalize a design for an aluminum fuel tank on the 020 Tee Dee soon.

Matt

Thanks Mr. Matt!

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Post  Tee Bee Fri Feb 16, 2018 9:17 am

I'd love to see some aluminum TD .020 backplate mounts on the market. Nice work, Mauricio! As usual. Smile
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Post  MauricioB Fri Feb 16, 2018 9:35 am

Tee Bee wrote:I'd love to see some aluminum TD .020 backplate mounts on the market.  Nice work, Mauricio!  As usual. Smile

Thanks friend! ... you know I was finding out where to get .020 piston and connecting rod .... do you remember ... I finally got three sets of Select Hobbies.

A few days ago some friends inform me that there was a person who had spare parts of .020 !!, I got in touch and I was very lucky !! .... I found three more sets, even in their original bags without opening! .. . just 300 km from home ... is not it something incredible? It was my lucky day.
Also screws for helix and screw and cone of 020! pump up! cheers

Converting a broken up PeeWee to a TD .020 Dsc03313


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Post  Tee Bee Fri Feb 16, 2018 10:26 am

Excellent! Congratulations. The supply is running short for those of us who still enjoy running these little gems. It's unfortunate that some of us may eventually run out of usable parts to keep our little engines running while collectors all over the world hoard pristine engines/parts hoping for a good investment. Efforts to preserve Cox engine history could effectively be partly to blame for making the hobby of running Cox engines...history.
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Post  crankbndr Fri Feb 16, 2018 10:52 am

With few weeks of eBay shopping I could gather enough engines and parts to run these for 100 years.
Other than Strato Bugs , RR-1s and TD Mark11 all other parts are plentiful.
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Post  Tee Bee Fri Feb 16, 2018 11:51 am

I may have over-exaggerated things a bit but certain Cox parts are getting really hard to come by, such as .020 piston/cylinder sets. TD .09 and .15 piston/cylinders are scarce as well along with some other goods. For those who only run .049 reedies, the supply is abundant.
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Post  crankbndr Fri Feb 16, 2018 12:04 pm

When I was tinkering with Black Widows and Golden Bees to build Mouse engines I would buy NIB engines just to break down for parts.
NIP parts are quite rare.
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Post  roddie Fri Feb 16, 2018 12:36 pm

MauricioB wrote:

A few days ago some friends inform me that there was a person who had spare parts of .020 !!, I got in touch and I was very lucky !! .... I found three more sets, even in their original bags without opening! .. . just 300 km from home ... is not it something incredible? It was my lucky day.
Also screws for helix and screw and cone of 020! pump up! cheers

Converting a broken up PeeWee to a TD .020 Dsc03313



It's like finding little gold nuggets! All I can say is; "good things happen to good people"! Thumbs Up Thumbs Up Small Cox Logo
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Post  Cribbs74 Fri Feb 16, 2018 12:39 pm

I got exited and popped onto the Exmodel website. Looks like the TD .020 lower halves are out of stock!
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Post  EXModelEngines Fri Feb 16, 2018 1:16 pm

Cribbs74 wrote:I got exited and popped onto the Exmodel website. Looks like the TD .020 lower halves are out of stock!

Check back in a few hours, just have to update them!

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Post  roddie Fri Feb 16, 2018 1:54 pm

Looking closely at Mauricio's recent Cox .020 parts find; I see that the part numbers on the original packaging, differ between the Tee Dee and Pee Wee cylinder, piston and rod sets. I'm curious if there are any physical-differences in the parts. Are the cylinders "ported" differently? (including any differences in sub-port induction..) Does the Tee Dee cylinder have a tapered-bore?

It would seem (to me..) that Cox would have made their Tee Dee .020 engine different from their Pee Wee .020; in more ways than just their being rotary-valve Vs. reed-valve induction designs. Cox could have named their rotary-valve variant; a Medallion .020 otherwise. Maybe it was a sales/marketing decision for Cox?

It's interesting that Tee Dee's .010 and .020 share a similar crank-case "extrusion-shape" with the .049/Bee engines.. yet the .049 and larger-displacement Medallion and Tee Dee engines use a beam-mount crankcase-design. I'm sure that there must have been reasoning for these differences.


Last edited by roddie on Fri Feb 16, 2018 1:56 pm; edited 1 time in total
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Post  Tee Bee Fri Feb 16, 2018 1:56 pm

Matt, we appreciate your efforts in keeping our engines noisy.
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