ORIGINAL: Augie11
ORIGINAL: Gray Beard
Give a 16X6 APC or a Master Air Screw a try. The added weight really does smooth out the idle. I'm in no way a fan of the MAS props but a nice heavy K series often helps out that idle on the Magnums.
That's a big prop for a .91 Gray?
Augie, it's a huge prop for a .91 and not the best of choice for most people. The MAS prop is crap but the added weight will smooth out an idle. I don't use them myself, I have a bunch but I just don't like them. I ran the 16x6 and 16x4 APC on a Kaos with a OS .91 4s and I run the same props on a Hots with a YS 1.10. The reason for the big props on these two planes was because I like my planes to fly slower but pull more for verticle stunts. I try to never mention a prop size to anyone but I did this time just for the OP to test and see if it would help with his idle problem. Most 60 size planes don't have the ground clearence for a 16 inch prop and I'm not sure if a Magnum will pull one that big. For most .91 4s engines I stay in the 14 or 15 inch range but it depends on the plane. The Hots and Kaos are the only two I have used the long prop on that made the plane fly the way I wanted.
