ORIGINAL: Jacked69
on my GP Minnow with a G75 Super Tigre I put a 13x6 prop on it, is that too small or should I go with a 14x7 or 8 or maybe a 15x6? I just want a prop that will give me max speed, so what prop should I go with? Thank you all fellas.
If you want max speed, you're going to have to find out for yourself what prop gives it on your airplane with your engine and your fuel at your field.
Start with the SuperTigre recommended props and go from there. Unless of course, you're not actually going to time the airplane to see what speed it's actually doing. Or fly it against other airplanes.
Unless you're actually doing something that will somewhat accurately measure the airspeed, just put a louder prop on it. None of us can tell the difference between 120 and 130mph, but almost all will believe the model with the louder engine is faster. If you actually want the speed, you will have to try some props yourself, and have some means to measure the speed. Failing that, just put a smaller diameter prop on it. More pitch too? Sure, why not.
If you're looking to buy "the best" recommended prop based on someone else's advice to save time or money, then look at the ST recommendations and pick from the smaller diameters with the larger pitch. If you'd like to go a step beyond that, when you're buying that prop, get a couple of different brands with that dia/pitch. To go a step beyond, try those and pick the one that seemed the fastest. Then go get that brand in a step up in diameter and maybe another of that diameter with a step down in pitch. Repeat the testing again with the new one(s) thrown in.
Again, if you're just looking to save money and time and fun, then look at the ST recommendations and pick from the smaller diameters with the larger pitch.
