Skip to comments.Radial Engine Powered Motorcycle
Posted on 05/24/2006 8:25:47 PM PDT by StarfireIV
The radial engine is a thing of beauty and it looks like several other folks think the same thing. After we posted the radial motorcycle yesterday, we contacted Rotec Engineering, makers of these 7 cylinder radial engines, and according to them, there are at least 4 of these projects in various stages of completion at the present time. Yesterdays bike and this one as well seem to be a bit short of running. I see no provisions for exhaust yet and no front brakes. This bike has no handlebars either so were still in the building stage. At first glance, you wonder if these guys are serious but these do seem to be real works in progress.
(Excerpt) Read more at thekneeslider.com, http: ...
Tried to upload the photo. Take a look.
The link doesn't work.
sounds interesting, the link isn't working on my end though.
Good grief. No thanks. The tank looks like it will be on top, a flat tank. I am curious though. Why? I mean I'd like to see it built myself but I don't know if I'd want to ride it.
thats a lot of moving parts
I have though that there should be a thread on FR that is dedicated to gauging posting speed - something of a NASCAR for keyboard and mouse coordination.
They came out with that model to use on homebuilt aircraft. There ain't NOTHING like sound of a radial engine except maybe two of them.
Signed up 5/25/06...
"I mean I'd like to see it built myself but I don't know if I'd want to ride it."
My god, think about the HEAT coming off that sucker. But you would have plenty of torque.
Great concept, elegant lines. How does it perform at 40 F below (average low winter temp)? And how much fun it is to ride at those temps?
Oh yeah for the five minutes you could sit on it.
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I was reading about Rotec; the company making the engine. There was mention of a supplemental electric oil pump which drains the oil out of the lower cylinders on shutdown thus preventing piston rod damage and also builds up oil pressure before the thing gets fired up. I wonder if having such an oil pump on car and bike engines would prolong engine life by building oil pressure even before the motor was started.
I guess you've never seen one running with two cylinders gone and the remains of two pistons hanging out of the crankcase. There is a reason most fighter airplanes went from radials to turbines with only a few exceptions (Mustang, Spitfire etc.)
Radials are reliable, and they smell good too.
Mustangs and Spitfires had in-line engines. Radials were used by the thousands duriing WW II.
That's funny right thar, I don't care who you are.
/Larry the Cable Guy
It sure would. Not to mention making it easier for the starter to turn the engine over if all the bearings were flooded beforehand.
It's SOP for large marine diesel engines and it's found on some aircraft, but I specified it on auxiliary and emergency generator sets that sit for days and weeks at a time with their heaters going. I know that it dries out the bearings and when they start up, they are required to almost instantly provide full power.
That's gotta be hard on dry bearings.
Yeah, right, and our airplanes are going back to double wingers. If this is real, and I doubt it, it's one ugly sucker that I would not be interested in.
40 below? Do snowmobiles even work at 40 below?
This one has a much better look, IMHO.
That was my point. There never was a carrier based in-line water cooled engine. They weren't reliable enough.
It makes a neat hydraulic motor, as well as an airplane engine. Any V-twin is just a pie slice out of one.
The big advance in radial engine technology came about on late WW1 airplanes when it was decided to stop spinning the entire crankcase while holding the crankshaft stationary.
Yep, the FW 190 had a radial, and it was as fast(faster than most) as any other fighter and more reliable than the ME109(I refuse to call it a BF109). The P47 also had a radial. All bombers had radials.
I guess you didn't see many radials in 1971. Then again, it depends if you flew 'em, fixed 'em, or played with the paper ones. Turbines made the whole argument moot though. My dad fixed 'em from 1942 - 1960. His bet, and the Navy's bet, was on the radial as being able to take the most punishment.
I hope no one posts any WW2 aircraft.
That thing is hideous.
Friend of mine had a Saab (or maybe a Volvo) of 60's vintage that had a radial engine in it. Three cylinders, IIRC. It was mounted with the plane of the pistons tilted back from the front bumper to the base of the windshield, more or less. Seemed to work fine, always started, even in Nebraska winters. Since it was air cooled, it used a separate gasoline powered heater, rather than air ducted over the cooling fins like early VW bugs did.
As to radials being nothing but air pumps, the folks who flew B-17s, B-29s, P-47 Thunderbolts, and F-4U Corsairs, as well as FW-190s and Mitsubishi Zeros would probably disagree.
I think a variant on the Wankel (as in the rotary engined Mazda RX-8) might make a good compact high powered motorcycle engine too.
looks like it has a ferris wheel for a motor
i've never even been on a motorcycle in my life (i'm 51). i would buy one of those, though.
Man, you don't know what you're missing. We're about the same age and I still ride. Been doing it for 40 years.
That would be the Le Rhone Rotary engine.
No wonder ya needed goggles flying one of those - oil flyin' everywhere.................FRegards
This is basically a pair of cylinders off a Rolls Royce Merlin aero engine originally fitted to a Mosquito bomber.
Anyway, here's a picture of a Wankel bike, a Suzuki RE-5, with a single rotor ~500cc displacement engine.
I can see airflow and cooling problems somewhere there.
It looks like 3 1/2 v-twins to me.
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