Would a few of you mind posting your power curves for a 20B and explain what you have done to the engine and what turbo you are running? Looking at putting a 20B in a new aeroplane that I'm designing

 

For an airplane a GT40, with intercooler and some way to get rid of overboost with a good blow off valve. There is a huge learning curve for that application. Ground pounders don't cruise all day with their engines putting out anywhere near 75% constant power, nor 100% on takeoff..................... somewhere I do have a power chart

 

oh, an Tracy Crook has done that in the USA. He used to make psru's. Not anymore.

 

Many thanks for the reply Cardmarc

From what we have seen a lot of the problems that people have had putting rotaries in airplanes ultimately comes back to them putting them into planes that weren't designed for/around liquid cooled engines, and so they then run into cooling problems. We are going for a different approach that we hope will solve a lot of these issues by designing the plane from scratch around the engine and its cooling needs, and using a three rotor instead of a two rotor to minimise torsional vibration.

Its unfortunate that Tracy has retired and is no longer making his PSRU's. One design aspect that we are looking at might eliminate the PSRU altogether which will simplify things..

If you are able to find that pwoer curve chart it would be a big help.

 

Have you touched base with Bob Mears, he has a great website showing the build of his 20b Spitfire. Sounds awesome in YouTube vids.

 

Got a link?

 

googled it for you

Mears Spitfire

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