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Engine for a Sig Kadet Mark II

Old 12-18-2023, 01:08 PM
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Default 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.

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Old 12-18-2023, 01:16 PM
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Could be a little big but, other than that, should work fine. I know the Kadet Jr directions call for a .15-.25 though it is only a 48" spanned plane.
Old 12-18-2023, 01:26 PM
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Yes this Kadet is just the full size Kadet Mark II, not the senior or the Lt.
Old 12-18-2023, 03:51 PM
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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....
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Old 12-18-2023, 04:17 PM
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I may actually just purchase a new engine that would be a perfect match for this plane, suggestions are welcome thanks
Old 12-18-2023, 05:26 PM
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A basic OS .35 would be a good match. A high performance version of that engine wouldn't be needed for a Kadet due to the lower performance of the trainer.
Old 12-20-2023, 05:10 AM
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It’s overkill on power but that’s what the throttle stick is for. Initially I was concerned about the weight of the engine but then looked up the Kadet MK II specifications. 57.25” span and 5 lb flying weight so the YS is certainly not too heavy.
Old 03-05-2024, 11:30 AM
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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.
Old 03-05-2024, 03:24 PM
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Should work fine Make sure you have the proper balance or you may have big problems
Old 03-26-2024, 10:40 AM
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find a os 46ax great motor and a good all around motor very user friendly motor will run great on 10% fuel

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