And what country can preserve its liberties if their rulers are not warned from time to time that their people preserve the spirit of resistance? Let them take arms. The remedy is to set them right as to facts, pardon and pacify them. What signify a few lives lost in a century or two? The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants.
This is not a scale model. This is an actual purpose built 9 cylinder radial engine. My resume includes air and gas compressor mechanic, Millwright, maintenance mechanic and electrician.
My father was an air compressor mechanic. He once asked someone which piston weighs more (a large LP aluminum piston and a smaller cast iron HP piston.) The correct answer is they both weighed the same.
When it comes to radial engines, you will never find an even number of cylinders. they are all 3, 5, 7, 9 or two banks of odd number cylinders. It is all about balance. Only in-line engines can support odd numbers of cylinders because of counter- weights.
I have worked on reciprocating compressors that were driven by by 5,000 HP elecrtic motors. Starting with Ingersoll Rand PHE's, these 2 cylinder compressors were horizontally opposed. Their HHE's added 2 or three banks. Not one of them had counterweights.
The most naturally ballanced engines or compressors are boxers.
I saw one of these at a car museum in England a few years back.
There were 3 prototype radial engine motorcycles built by Peugeot that were used in boardtrack racing in 1930's. It was a powerhouse compared to the Indian's and Harley's that had been dominating boardtrack. It had problems with exhaust heat, getting it started, and a gyroscopic force issue that made it a difficult bike to ride.
The gyroscopic effect only applies to balaced spinning masses like flywheels and tops. As a mechanic with more than 40 years in the trades, I can tell you that "gryoscopic forces" do not even come into play. All radial engines have an odd number of cylinders. This is a conscession to balance.
I own a 96 CI Harley Davidson. The engine in this photo is more balaced than my twin cam V-2 but that does not equate in any way to centripetal forces! As a science geek at age 14 I understood Newtonian physics.
Gyroscopic precession also effects an airplane when the spinning prop is changed to either ascend or descend, requiring opposite rudder to hold the nose in line....don't know if presession would apply to a radial engine without a spinning prop....
Fascinating! That radial motor fits in so well that I'd have sworn it was actually 1930s, but the bike's original motor was apparently a 100cc single. This motor looks perfect!
Scale models of 9 cylynder radial engines did not exist in the early 1930s. This is an ACTUAL motorcycle that would have dominated Harley Davisons and Indians back in the old days. I am an HD fan with a 96 CI chppper in my garage. This is a genuine scooter!
Could be legit. That's about the right size for a 1/5 or 1/4 scale engine.
ReplyDeleteThis is not a scale model. This is an actual purpose built
Delete9 cylinder radial engine. My resume includes air and gas
compressor mechanic, Millwright, maintenance mechanic and
electrician.
My father was an air compressor mechanic. He once asked someone
which piston weighs more (a large LP aluminum piston and a smaller
cast iron HP piston.) The correct answer is they both weighed the
same.
When it comes to radial engines, you will never find an even
number of cylinders. they are all 3, 5, 7, 9 or two banks of
odd number cylinders. It is all about balance. Only in-line
engines can support odd numbers of cylinders because of counter-
weights.
I have worked on reciprocating compressors that were driven by
by 5,000 HP elecrtic motors. Starting with Ingersoll Rand
PHE's, these 2 cylinder compressors were horizontally opposed.
Their HHE's added 2 or three banks. Not one of them had counterweights.
The most naturally ballanced engines or compressors are boxers.
I saw one of these at a car museum in England a few years back.
ReplyDeleteThere were 3 prototype radial engine motorcycles built by Peugeot that were used in boardtrack racing in 1930's. It was a powerhouse compared to the Indian's and Harley's that had been dominating boardtrack. It had problems with exhaust heat, getting it started, and a gyroscopic force issue that made it a difficult bike to ride.
The gyroscopic effect only applies to balaced spinning masses like
Deleteflywheels and tops. As a mechanic with more than 40 years in the
trades, I can tell you that "gryoscopic forces" do not even come
into play. All radial engines have an odd number of cylinders.
This is a conscession to balance.
I own a 96 CI Harley Davidson. The engine in this photo is more
balaced than my twin cam V-2 but that does not equate in any way to
centripetal forces! As a science geek at age 14 I understood Newtonian physics.
Gyroscopic precession also effects an airplane when the spinning prop is changed to either ascend or descend, requiring opposite rudder to hold the nose in line....don't know if presession would apply to a radial engine without a spinning prop....
DeleteHere's the story on this bike.
ReplyDeletehttp://www.dwrenched.com/2015/05/dwrenched_29.html
If the story is to be believed it's not a Peugeot engine. It's a scaled up copy of an RC airplane radial engine. 100cc displacement.
Fascinating! That radial motor fits in so well that I'd have sworn it was actually 1930s, but the bike's original motor was apparently a 100cc single. This motor looks perfect!
DeleteFirst working steampunk bike I've ever seen!
Scale models of 9 cylynder radial engines did not exist in the early
ReplyDelete1930s. This is an ACTUAL motorcycle that would have dominated Harley
Davisons and Indians back in the old days. I am an HD fan with a
96 CI chppper in my garage. This is a genuine scooter!