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Author Topic: Torpedo .29  (Read 1888 times)

Offline James Holford

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Torpedo .29
« on: April 08, 2017, 06:34:39 PM »
Received this nice Torp .29 today. Excellent  compression.

But what is that hole on the backplate?




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Jamie Holford
Baton Rouge Bi-Liners
Lafayette, La
AMA #1126767

Offline Chancey Chorney

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Re: Torpedo .29
« Reply #1 on: April 08, 2017, 06:57:46 PM »
With my very limited knowledge in this old engine stuff, I would like to believe a fuel tank of some sort? Just a guess.

Offline Chancey Chorney

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Re: Torpedo .29
« Reply #2 on: April 08, 2017, 06:59:16 PM »
So I just saw badbill's for sale post. It is NOT the same engine, but has what I thought attached?
http://stunthanger.com/smf/classifieds-92/for-sale-1947-torpedo-special-29/

Offline Douglas Babb

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Re: Torpedo .29
« Reply #3 on: May 18, 2017, 08:21:57 PM »
Should be threaded to take a fuel tank mounting screw, relief around edge would take a thin paper gasket that the tank edge sealed against. Looks like bolts were changed out to 4-40 to take self locking nuts.

Offline EddyR

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Re: Torpedo .29
« Reply #4 on: May 21, 2017, 10:12:55 AM »
We use to drill a hole through the backplate and add a pressure tap for combat flying. It worked vey well. Easy to plug up when not using it. The 29-32 were good combat motors in there day.

Ed
Locust NC 40 miles from the Huntersville field

Offline Bootlegger

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Re: Torpedo .29
« Reply #5 on: May 21, 2017, 04:18:36 PM »
 Jamie, I will send ya a P /M
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Gil Causey
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Offline FLOYD CARTER

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Re: Torpedo .29
« Reply #6 on: May 23, 2017, 06:34:31 PM »
In the '50s, we ran the K&B 29 on pressure.  As I remember, drill a #80 hole through the threaded tank mount.  I found a "universal" needle valve with the proper threads to fit the backplate threads. 

Used for stunt, with all tank vents closed.  It's curious that it works, because crankcase pressure goes negative then positive each cycle.  I guess there is a net positive pressure, which keeps the tank at a slightly positive pressure.
89 years, but still going (sort of)
AMA #796  SAM #188  LSF #020


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