Engine for a Sig Kadet Mark II
#1
Thread Starter
Engine for a Sig Kadet Mark II
Got my hands on an old YS 45 SE, would this engine be good for an Sig Kadet Mark II? Any thoughts please. I do have an old Como 40 that I can also use.
Last edited by brianl1620; 12-18-2023 at 01:59 PM. Reason: Add info
#4
Either will work, depends on the use case. And, of course, how well either engine runs. For a beginner, I'd lean toward the Como. Easy to start, easy to adjust, lower nitro fuel. The YS is more of a powerhouse, and while not at all too much for this plane, a bit of a mis-match. The plane just won't use the extra power to much advantage. Save the YS for a sport/aerobatic build, where it will come into its own. Unless, of course, the Como ends up being a dog....
The following users liked this post:
brianl1620 (12-18-2023)
#8
My Feedback: (3)
Those old engine guidelines for .19 - .29 - .35 engines sizes was rated before schnuerle porting was a common thing if even implemented yet. Old engines were slower, lighter, didn't often have any ball bearings, by comparison to today's technology. By the mid 1980's just about everything adopted Schneurle porting for those wanting more power. Old kits were for old engines, and most engines didn't come with a muffler either.
This is a trainer. Trainers don't have a symmetrical wing generally speaking. The wing bottom is flat, to increase lift, creates odd behavior when you over power these models.A common tendency for trainer pilots is a practice of using wide open throttle. A .25 engine model based upon a 1970's engine rating, would certainly be overpowered with a schneurle ported .40 - .45 as you mentioned you have. Go .25 with a LA or FP series OS engine, or GP series Magnum, and you'd have power to spare. Otherwise, you might be entertaining spectators who are watching parts fly off your model.
This is a trainer. Trainers don't have a symmetrical wing generally speaking. The wing bottom is flat, to increase lift, creates odd behavior when you over power these models.A common tendency for trainer pilots is a practice of using wide open throttle. A .25 engine model based upon a 1970's engine rating, would certainly be overpowered with a schneurle ported .40 - .45 as you mentioned you have. Go .25 with a LA or FP series OS engine, or GP series Magnum, and you'd have power to spare. Otherwise, you might be entertaining spectators who are watching parts fly off your model.