Glad you asked: and if you wanted to make the power to weight ratio better you‘d re-do a lot anyways or start with the head (xj13?)…
I once read I think that a pre he v12 could do up to ~2000hp, but cooling would be the big issue?
Hey, I came up with the Napier Deltic and I‘m younger than you
I think I once saw a Jumo engine at a museum and was intrigued by the design idea. And the three cranks I thought might distribute most forces, that’s how I came there.
The Deltic engines have been pulling freight trains even recently IIRC, they can’t cope emissions wise though. Not bad for a direct steam replacement I’d say…
Kirbert
(Author of the Book, former owner of an '83 XJ-S H.E.)
62
Here’s a very basic explanation from the Stunt Hanger website.The Handle has a rod going through it that is a very coarse thread, along with a slider. When you move the slider it twists the single control wire running to the plane. There is a control system that goes in the wing consisting of gears which convert the twist to a linear motion. This description of the handle is what was used a number of years ago and the current handles are very different. We had a hobby shop at the time and as tether race cars were my main interest I only “fooled” around with speed flying and never bothered to learn monoline flying except in a 45 MPH trainer.
Paul, The basics of the expansion chambers go back to just before WW2 and were used on most/all racing 2 stroke engines after WW2. They came onto the model airplabe scene in the early 60’s and tether cars 10 or more years later. They operate on sound waves and “pipes” are designed for certain RPM operating ranges. All of our MX bikes ran expansion chambers and coming on the pipe was like “coming on the cam” but even more so. I ran tether cars for a number of years but the hobby is almost dead today from hundreds of tracks after WW2 to only three? today.
Bob
Bob
Sure, I‘ll be 21 on Sunday. Sorry, where I learned about what? The Jumo Engine, could have been anywhere in Germany pretty much; maybe at the Dornier Museum.
I looked into the monoline and isn’t it similar to a speedo drive actuating the elevators? Never knew about those circle things even though they make obvious sense, sure you‘ll get dizzy from a few things all at once. Cool. Imagine a V2 version of that Doodlebug!
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Kirbert
(Author of the Book, former owner of an '83 XJ-S H.E.)
69
Many decades back I watched a series of boat races. The boats all had outboard motors with multiple cylinders with adjustable expansion chambers on each cylinder. The drivers were on their knees, steering with one hand, operating the throttle with the other hand, controlling the expansion chambers with one foot, and all the while leaning forward or back to keep the nose of the boat exactly the right distance above the water.
some more info about the Napier Deltic, BEFORE WW2 Napier (England) bought license and manufacturing rights FROM Junkers Jumo Germany and used it for many diesels!
check out , wikipedia Turbo-compound engines , very interesting stuff, seems back in war years many theories and ideas were exploited.
one that comes to mind was USA sent 1940/42 some P38 fighter aircraft to GB,with turbochargers on Allison 1710 V12.
well some nit wit said NOway, it may be better than our Spitfires, so they took the turbos OFF, of course they had NO hi altitude performance , so GB said use them for picture taking, DUHH>.
well in the Pacific theater P38s cleaned house against the Japanese!
Kirbert
(Author of the Book, former owner of an '83 XJ-S H.E.)
73
Well, not exactly. The US refused to export the turbocharged Allison, so they sent non-turboed P-38’s to the UK. They sucked hard, so the Brits sent them back.