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"Tee Dee .020 on a free-flight model"



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Post  KariFS on Thu Jul 11, 2019 3:44 pm

ticomareado wrote:I believe you've got a pre '96 QRC for use with a muffled PT-19. Somebody decided they'd rather make noise.

I think Bob’s engine is a QZ, like mine on page 12 of this thread. Not sure but I think QRC only came with the stunt tank. Or maybe it’s a Babe Bee equipped with the QZ conversion kit minus the silencer. Interesting engines anyway. Collecting these is almost like collecting stamps, always looking for variations and anomalies Smile The engines are more fun than stamps though.
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Post  ticomareado on Thu Jul 11, 2019 3:49 pm

You are correct-- QZ it is.
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Post  GallopingGhostler on Thu Jul 11, 2019 6:15 pm

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Post  getback on Thu Jul 11, 2019 6:24 pm

cheers cheers cheers Beer Cheers Beauties !!
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Post  balogh on Sat Jul 13, 2019 4:22 am

balogh wrote:Thanks Bob an Ticomareado.

From the COX Model Engine Handbook I figure my Babe Bee has the same detail features as the ECJ#38 dating back to 1956.

I also expected this to have a 3-piece piston, but in fact this has a 2- piece one.

....

I must correct myself..when I managed to undress her today and get the piston out by first unhooking the large rod end from the crankpin (the cylinder did not budge no matter how I heated then froze the crankcase) then pushing the piston up and out from a preheated cylinder (seems to have some taper no matter it is a No2 cylinder) I found a 3-piece piston in my hand:

Recent engine acquisitions - Page 16 20190715

A bit sloppy balljoint with unwanted gap but I am afraid this cannot be reset like later pistons...the rod is thicker than in later pistons and the reset tool slot does not fit, for one thing..and hammering the rod retainer clamp in the piston does not seem a healthy cure, for another..
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Post  ticomareado on Sat Jul 13, 2019 7:16 am

Well then you've become a collector whether you intended to or not. Clean her up real purty, make a document style brass plaque and put her in a showcase.
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Post  balogh on Sat Jul 13, 2019 7:26 am

No showcase or brass plaque kind of things Ticomareado, not that I am surprised if real collectors like Dan Sitter keep their engines in such reverence..I will start her up but am concerned whether the sloppy balljoint will last..
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Post  1/2A Nut on Sat Jul 13, 2019 8:01 am

Scored this all metal TD .15 Special after putting it together
with parts and some elbow grease.

Mecoa plug adapter
Valentine bullet spinner
Bob's aluminum carb body with O rings
Greg's radial mount

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Post  ticomareado on Sat Jul 13, 2019 8:48 am

Bitchin' .15 !! All it needs is a flywheel, cooling jacket, belt driven water pump and a low rider car to mount it on.
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Post  balogh on Sat Jul 13, 2019 9:08 am

Nice catch Brad..I guess a .15 TeeDee will not lose much power if used with the adaptor head instead of the stock COX glow head?
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Post  1/2A Nut on Sat Jul 13, 2019 9:46 am

Thank you gents Thumbs Up , the compression with the 15 is ok needs a
turbo head adapter to add some extra power.

Get ready the Turbo Head adapters for the .049 -.051 have
been batched milled this morning. They will also work with
the Norvel .049 and .06 and the AP .06

Folks can now source the .15 size radial mounts here:
https://kamtechnik.com/product-category/cox-aft/

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