9 cyl. radial motorcycle picture
9 cyl. radial motorcycle picture
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9 cyl. radial motorcycle picture
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RE: 9 cyl. radial motorcycle picture
where would you use it?
RE: 9 cyl. radial motorcycle picture
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: 9 cyl. radial motorcycle picture
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: 9 cyl. radial motorcycle picture
It might be a good idea to only ride it with emergency services close by, but then again, there might not be much left for them to do.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: 9 cyl. radial motorcycle picture
Mike Halloran
Pembroke Pines, FL, USA
RE: 9 cyl. radial motorcycle picture
Double plus 1 = 9.
RE: 9 cyl. radial motorcycle picture
I didn't know they made nines that small.
Going 'up' in the URL gives me information on fiberscopes, with no link to the motorcycle. Anyone know more about it?
Mike Halloran
Pembroke Pines, FL, USA
RE: 9 cyl. radial motorcycle picture
http://www.rotecradialengines.com/cool.htm
And here's a link to a thread in another forum with a different take on a radial bike:
ht
RE: 9 cyl. radial motorcycle picture
RE: 9 cyl. radial motorcycle picture
The front wheel as well!
Cheers , Pete.
RE: 9 cyl. radial motorcycle picture
Why are all radial engines odd numbered?
Franz
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RE: 9 cyl. radial motorcycle picture
Dan - Owner
http://www.Hi-TecDesigns.com
RE: 9 cyl. radial motorcycle picture
I guess the firing sequence would be something like 1-3-5-7-9-2-4-6-8. Every second cylinder in sequence fires around the engine. Pairs of side by side cylinders would reach TDC almost simultaneously. one would be at TDC firing, and the other at TDC overlap. That sort of sequence only works with odd numbers of cylinders.
RE: 9 cyl. radial motorcycle picture
http://en.wikipedia.org/wiki/Radial_engine
RE: 9 cyl. radial motorcycle picture
Radical radial.
Pratt & Whitney Wasp Major
28 cylinders
1.11 lbs per HP
4,360 cu in
4,300 HP!
http://
RE: 9 cyl. radial motorcycle picture
RE: 9 cyl. radial motorcycle picture
It is not accurate to say that ALL radial four strokes must have an odd number of cylinders per row. I am aware of two exceptions, both produced early in the 20th Century. The Fairchild- Caminez had four cylinders, and the Marchetti had eight. I think the Fairchild- Caminez was produced in some quantity, and there may have been variants. The Marchetti was produced not by the Italian airplane manufacturer, but by Paul Marchetti of San Francisco, who died while flight testing an airframe in which to flight test his engine.
I got interested when I saw a photo of what must be the Marchetti engine, sitting alone somewhere, in some technical fish wrapper, with a derisive caption about how stupid you had to be to actually build a radial eight.
I can't remember which fish wrapper, but I did find images from Paul's advertising campaign, which you can probably Google up.
...
There is a trick, of course. Both those odd engines use sturdy desmodromic cams and rockers to actuate the pistons. There is no crankpin. Each cylinder does a complete cycle in one output revolution, so the 'crank cams' are symmetrical and naturally balanced.
Mike Halloran
Pembroke Pines, FL, USA
RE: 9 cyl. radial motorcycle picture
Refined radial engines have an odd number of cylinders to allow for a constant every-other-piston firing order. A 7 cylinder fires 1-3-5-7-2-4-6-1...
An even number of cylinders can't do that.
Not sure about the 4 layered version
RE: 9 cyl. radial motorcycle picture
It uses a supercharger and a turbocharger and uses a compressed air bottle as a starter when it dumps air into the direct drive supercharger to turn the engine over to start it.
_____________________________________
I have been called "A storehouse of worthless information" many times.
RE: 9 cyl. radial motorcycle picture
Scott
In a hundred years, it isn't going to matter anyway.
RE: 9 cyl. radial motorcycle picture
The best story is where some American auto executive is telling him that the problem with his company that the engineers have to much power and that the accountants should be in control. He didn't realise that Bently was an engineer. The irony is that in the end the accounts did take over the company.
RE: 9 cyl. radial motorcycle picture
This had a 400 Hp air cooled radial engine that sat right behind the driver and tank commander. Their heads were only about a foot in front of those rather large finned cylinder barrels. The gearbox was between driver and commander at hip level, and it drove the tracks from the front.
I often wondered about the heat and noise, especially in the tropics with the hatches shut. Later versions of the Sherman used a diesel engine.
RE: 9 cyl. radial motorcycle picture
Mike Halloran
Pembroke Pines, FL, USA
RE: 9 cyl. radial motorcycle picture
http://en.wikipedia.org/wiki/Sherman_tank
Right at the end there is a list of engines used.
There is an early fully restored M4 Sherman at a tank museum here in Melbourne. They also had some engine parts on display, including a radial that had blown up. Apparently the master connecting rod had failed, and all the other connecting rods were twisted into unbelievable shapes, quite a sight.
RE: 9 cyl. radial motorcycle picture
Franz
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RE: 9 cyl. radial motorcycle picture
This was a four row radial engine of five cylinders (20 cylinders altogether) and it used standard production flathead V8 crank, pistons, rods and cylinder heads.
Only the block was special. Almost everything else came straight off existing wartime production lines. As I recall from the article, this engine was developed at very short notice during WW2 as a tank engine, and was only made in very small numbers.
RE: 9 cyl. radial motorcycle picture
The engine was a lot bigger than the earlier ones so the hull was made longer to accomodate it.
The (Australian) Sentinel used a similar arrangement of 3 V8s, because V8s RULE.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: 9 cyl. radial motorcycle picture
Looks like 5 engines simply stuck together on a common circle. Lower 2 banks laid almost flat and were at different spacing to those above. Must have been a real gas hog.
RE: 9 cyl. radial motorcycle picture
680 cu.in. 300 hp @ ~2100 rpm
They where one engine option for a Stinson Reliant.
I flew one so equiped in the 60's, an oldy-but-goody even then. Very smooth.
But in a motorcycle? I only believes it cuz I sees it.
RE: 9 cyl. radial motorcycle picture
They were quite common, called "tank engines" and available surplus for many years after the war. They were Continental W-670's, 7 cylinder, rated 225 hp. Used often by crop dusters. (why overhaul? just get another tank engine)
On gasoline fueled armor:
Pilot sometimes called the Betty Bomber "the flying Zippo" - a few hits and in was burning. In turn, the Germans called our Sherman tank "the Ronson" for the same reason. A gasoline powered tank is easy to light.
RE: 9 cyl. radial motorcycle picture
It's still the largest sea plane ever built.
Best regards
pennpoint
RE: 9 cyl. radial motorcycle picture
I think the Herculese (Spruce Goose) used the 28 cylinder Wasp Major pictured above. Check out the link above the picture.
RE: 9 cyl. radial motorcycle picture
Howard Hughes used Pratt & Whitney R-4360's to power the "Spruce Goose". They were the early "high tension" ignition model engines and had severe engine miss fire at altitude. This was cured by what was called the "low tension" ignition configuration later on in the R-4360 development.
I was a USAF reciprocating engine mechanic during the Viet Nam war. My first few years were spent working on R-4360's as installed on Douglas C-124 aircraft. The flight engineers panel had four osciloscopes. One for each engine ignition. Also, the engines had torque meters built into the nose case. Another item for the flight engineer to monitor on take-off.
Being behind one of these engines on a test stand during "military takeoff power" was, well, unreal to say the least.
A very few Chance-Vaught F4U (Corsair) fighters (WW II) were engined with R-4360's. If I remember correctly, the pilot had to take off with the tail wheel down for prop clearance. Landing, ditto. Also, the torque was so severe that take off was extremely------EXCITING!
The F4U with R-2800, R3350 (Wright 18 cylinder) and especially with a R-4360 were the air superiority fighter of WW II. I know several pilots who flew F4U's in combat in the Pacific. They have great stories about these radial powered machines.
RE: 9 cyl. radial motorcycle picture
WilliamH
I stand corrected
Thank you
Best regards
pennpoint
RE: 9 cyl. radial motorcycle picture
When they landed, a crowd gathered around as the techs pulled the cowling, located the bad jug and piston and replaced same. I seem to remember it being somewhere in the middle of the stack, facing the engine about the 9'oclock position, plus seeing more safety wire, nuts, clips, and shielding I have ever seen. Air cooled engines have an advantage on engine repair without draining coolant.
The process took about 4 hours, certainly not war-time speed, but no one was shooting at you either!
Franz
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RE: 9 cyl. radial motorcycle picture
RE: 9 cyl. radial motorcycle picture
The neatest radial that I have seen was a comparatively minute 5-cylinder, vertical shaft, on what appeared to be a portable military generator set. I couldn't help but think of what a fascinating way to accomplish what could surely have been done more inexpensively with a single or twin Briggs and Stratton. Only in the military!
I suppose that that configuration (5-cylinder, vertical shaft) would be the only way to have an even firing, inherently balanced 5-cylinder automobile engine. It could feed directly into a front (or rear) drive transaxle.
RE: 9 cyl. radial motorcycle picture
http://t
Looks a little more practical then the first one mentioned.
RE: 9 cyl. radial motorcycle picture
ht
RE: 9 cyl. radial motorcycle picture
RE: 9 cyl. radial motorcycle picture
Looks like 6 plug wires leaving each distributor, so probably an Sherman M4A4, with a radial arrangement of 5 straight-6 Chrysler A57 engines (Wikipedia mentions selected models, so perhaps others). Also, the M4A4 cutaway diagram shows this was water-cooled.
RE: 9 cyl. radial motorcycle picture
RE: 9 cyl. radial motorcycle picture
Is your display set at 800x600? Try 1024x768 and let us know if it works, so can tell Dave.
Ken
RE: 9 cyl. radial motorcycle picture
Apologies to anyone who gets messed up by the wide picture of the radial. (I try never to go over about 650 wide!)
RE: 9 cyl. radial motorcycle picture
RE: 9 cyl. radial motorcycle picture
Eng-Tips lacks a bottom scroll bar when needed for wide photos.
For larger letters, go to Display Settings, Advanced, then switch the screen font size from small to large (125%). Hope it works,
Ken
RE: 9 cyl. radial motorcycle picture
RE: 9 cyl. radial motorcycle picture
RE: 9 cyl. radial motorcycle picture
http://www.blastolene.com/The_Special/index.htm