Magnun 75 Prop-RPM figures

Magnun 75 Prop-RPM figures (Full Version)

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Mad Town -> Magnun 75 Prop-RPM figures (5/8/2008 3:37:58 AM)
I have a new Magnum 75 (broken-in) That is not putting out the power I think it should. Flying a 60 size Mustang with 12-7 APC. Does anyone have Prop-RPM readings so I can know what to expect from this engine. Thanks so much guys.

Nathan King -> RE: Magnun 75 Prop-RPM figures (5/8/2008 3:40:52 AM)
What RPM are you getting?

Mad Town -> RE: Magnun 75 Prop-RPM figures (5/8/2008 4:12:26 AM)
Actually it is my friend's engine. I have not tached it. Just watched the plane fly. What I am trying to find out is baseline reading so I can compare. Also Magnum recommends a 12-6. Isn't this kinda small for a .75? What props works good for you guys? Thanks

asmund -> RE: Magnun 75 Prop-RPM figures (5/8/2008 8:13:48 PM)
12-6 APC will be fine and expect about 12-12500 rpm. 13-6 is about as big as you can go and will turn about 11500 rpm This is based on my readings from my Tower 75 engine. I expect your ASP to be about the same power. If you have a baffle in the muffler you will release more power by removing it, but noise will increase some. We have one of those ASP 75`s on our field, but I have not had a chanse to tach it yet, pretty strong engine though.

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