12

The Wankel excellent power to weight ratio will eventually
result in air craft with more range.

My C182 has a 1000 mile range roughly with a 230 HP 500 pound
engine. Lets figure out how far is would go with a 250 pound engine
230 HP engine. We could move the engine forward to make
room for a tank in the nose.

We need to add a tank in the nose and one in the tail to balance it.
250 pounds is 40 gallons of fuel. Lets say 30 pounds in the nose tank
and ten pounds in the tail tank. Right now it is getting  11 MPG.
90 gallons  fuel 1000 mile range.

So with 40 gallons more the range would increase to 1,444 miles.
Almost 50% more range. Non stop across the Atlantic with the
same payload. Not quite to Hawaii. A turbo compound version would
probably make Hawaii.

Another example is a Super Connie. The Supper Connie had four turbo
compound radials that weighed 4000 pounds each and put out 4000 HP
roughly. One HP per pound. It could fly 4660 miles SFO to London
Heathrow non stop with 100 passengers.

It had about 5,000 gallons of fuel that weighed 31,000 pounds with a 5,000 mile  max range roughly.


The total weight of the engine was 4 times 4,000 pounds each or 16,000
pounds total engine weight. If a Wankel type engine was used with a two HP per pound
instead of one HP per pound that would be 8,000 pounds of additional
fuel. In other words in theory the range would be 6,250 miles.
Wow !!!!! One quarter of the  way around the world non stop.

Of course that is not going to happen as a B747 or B787 now have close to that range.

Paul Lamar


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