I currently fly two of the currentRossi .60 long stroke engines, 240R60. The current inventory of Rossi engines can be found at http://shop.vendio.com/rossienginesusa/category/1/. The 240R60 is not currently listed but you might check with the importer.During our recent conversation he told me he had one in stock. The alternate is the short stroke Rossi 35R60 which is available with or without a number of exhaust systems. I currently fly my Rossi's with the Jett Stream 60-90 tuned muffler with excellent results. I fly one on a World Models Intruder and the other on a sport plane. They have excellent power. However, I would offer this caveat; order the engine with the 8.5mm carburetor. Mine were shipped with the 10mm carburetor. They have idle/transition issues that so far Rossi has not solved. I do however have one 10mm carburetor that works fine. The 8.5mm carburetor also works well. Tuning is not difficult with the 8.5mm carburetor. I initially run my new engines on a test stand with FAI fuel with extra castor oil.

The short stroke engine is offered with two Jett Stream mufflers, one is the 45 and the other is the 60-90, with the 45 being used for higher rpm and the 60-90 for lower rpm.In my opinion Rossi'sare excellent engines that are very robust. The new ones have a 3 year warranty. The spec weight of the 35R60 is 20.4 oz without muffler. The 240R60 is slightly heavier.

I used either Omega or Powermaster 5% fuel in the Rossi's.

Ihave a Sport Jett 50 purchased used. It has the AAC piston and liner set. It is set up for high rpm, turning an APC 10x6 at 16,700 RPM with Powermaster 15% fuel. I do not know if it will turn the 10x7 or 10x8 effectively with the Jett Stream muffler. It weighs 11 ounces without muffler. The specs can be found at http://www.jettengineering.com/engines/sj40-new.html

I recall my Dad flying a P-8 back in the 80's and I believe had a heavier engine such as a Rossi or HP gold cup. Good luck with your choice.

Danny Jackson