ORIGINAL: robbie
ORIGINAL: Antique
It's a 3.4 Sachs, 57/2B is a Kolbenschmidt cylinder..I have one here in my hand as we speak...
Hey thanks for the confirmation on the 3.4 size. so tell me, how reliable an how powerful is this engine in comparison to it's lighter rivals out there right now. it was on a 35lb mammoth scale Skyraider that has a 120''WS. the plans call for a 3.1 kawasaki engine.Seems quite small for a bird that size. and weight. can anything be done to lighten the sachs for a more modern aerobatic plane, and install a 4.2 on the raider?
I fly a 34 pound Ziroli Skyraider with a Quadra 75. Good performance from a great engine. While the plane would fly with less power, I wouldn't care to fly it with less. A 4.2 would fly it just fine too but I believe the Q75 is a few hundred RPM stonger.
Don't be afraid to put some HP in that plane and don't worry about the engine weight. More weight will probably be a good thing as you'll just have to add lead otherwise.