Be sure and check out the Radial engine too. That's the most authentic looking model engine I've ever seen. It's correct in every detail down to the spec plate on the crankcase. I should know, there are two of those engines on stands where I work, and I compared that picture to the real thing. The only flaw in the detailing was that the full size one has two more cooling fins between the rocker boxes than the original; Paul Knapp, the builder said they just couldn't make casting patterns with that many fins in that location. These engines do run, and they've built 1/4 scale radio control airplanes that actually fly.
Would the mini Aurora V-8 fit nicely into a motorcycle frame? Would this engine actually run without melting at high RPM? What sort of gearbox could be fitted? There's no mention of horsepower, but I imagine well over 100 hp should be possible. http://www.replicaengines.com/products/aurora.htm
Motorcycle Classics magazine (a great mag, unlike those UK classic bike ads that seem to be becoming large buy/sell pages) did a nice article on Morbidelli's 850 V8 motorcycle, which got me thinking of the mini Aurora V-8 for a bike motor.
"Would the mini Aurora V-8 fit nicely into a motorcycle frame? Would this engine actually run without melting at high RPM? What sort of gearbox could be fitted? There's no mention of horsepower, but I imagine well over 100 hp should be possible." ??? It's 3.8". 15 hp might be possible at 20,000 RPM.
I thought it was a 1/4 size replica. The website shows a displacement of 3.8 C1. I assume this means cublic inches. 1 cubic inches = 16.387064 cubic centimeters, so that's a displacement of 62.2cc.
I agree at this displacement we'd have a pretty weak motorcycle engine. However this can't be right. If the scale is 1/4, this would mean the full size race car engine was only 250cc.
Something is amiss here. The IRL Aurora V8 is based on the production 4.0-liter DOHC 32-valve Aurora V8. The production Aurora V8 engine produces 250 horsepower at 5,600 rpm on unleaded gasoline; the methanol-burning IRL Aurora V8 racing engine produces over 700 horsepower and revs to 10,500 rpm.
Thus, if this is a true 1/4 scale replica, the new motor should be a quarter of the 4.0 L displacement (i.e. 1,000cc), and should generate a quarter of the horsepower, 250hp on gasoline = 62.5hp at 1/4 scale or 700 hp on methanol = 175hp at 1/4 scale.
Assuming my numbers are right, I am surprised how weak a 1,000cc version of this motor would be. 62.5hp on 1,000cc? A 1995 Triumph Trident 885cc obtains more hp than that.
Originally posted by Alex: Those replicas are all strictly small-time. This is hardcore.
I've had pictures of that guy and his engine on my website for at least 6 years. Apparetnly nobody followed the link I put up there. That's an 18 cylinder two stroke engine with 36 pistons sharing common combustion chambers between the opposed sets of pistons. I spoke with the builder several times over the years, as he displayed it at the Pacific Rim Model Engineer's Show here in Oregon. Everything on that engine was machined from billet. It's called a "deltic" engine, because it has 3 crankshafts arranged in a triangle. Clen told me his engine isn't really a "replica" he designed it himself based on the deltic concept. If it was a replica, it would be 1/10th scale or smaller of one of those really big marine or locomotive engines. BTW, it looks like the picture on the site you linked to was taken at the same show I took my pictures at.
That Deltic is the most odd thing I have ever seen [and I was in Sydney last week ]
Napier also built the Sabre aero engine for installation in the Hawker Typhoon, back in the early '40's. A grim joke was that if you wanted to own a Typhoon buy a paddock, [in the UK] one was bound to emergency land on it !
The Brits lost a lot of pilots until they found a piece of liver, analysed it, and found the unfortunate airman was full of carbon monoxide, the solution was to continue operations with the pilot on oxygen whenever the engine was running.
I believe that BRM revived the H16 concept for an F1 car back in '63 or therabouts.