5 Liter V-twin

ch2co

Grumpy Old Man
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Joined
Jan 9, 2013
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1,006
Looks and sounds like a great motorcycle engine! ;)

CHuck the grumpy old guy
 

GA Gyro

H-M Supporter - Gold Member
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Aug 12, 2014
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1,009
Hmmm...

Anyone notice anything 'different' about that engine...
Hint: Look at individual parts and configurations...

Definitely a custom job.
 
G

Grumpy Gator

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Allen started with two Pratt&Whitney 1340 jugs and hand built the crankshaft , connecting rods and the motor case.
He built wooden patterns and cast the Al case himself.
I will try to dig up some pictures of the bike he built to fit that motor too.
Five Liters = 305 and change cubic inches.
*G*
 

GA Gyro

H-M Supporter - Gold Member
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Aug 12, 2014
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1,009
Yes, Gator caught it... :)

Those are jugs from an aircraft radial...

In my younger days, as an A&P, worked on those engines.

Interesting idea, never seen anyone build an engine with aircraft 'jugs' before.
 
G

Grumpy Gator

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Here is a short video of the crank assembly that he built.
The flywheels weigh 150Lbs.
*G*
 
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