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rmenke -> RE: Does 3D Prop size matter? 130g Motor at 14x7 for 3D HobbyShop EPP Yak 48 (6/21/2012 12:22 AM)
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Gizmo:
You need to learn what size motor you need to do what starting off. First, just how much motor do you need? Useing weight as a basis is my mort used method. Ok, common smarts say yoiu need 4s0 oz of thrust to hold your airframe in hover. But, you need more power to pjull out of a gioof up. Decide how must thrust you are going to shoot for leaving say 20% for over rating, which most manufacturers do. Most great 3D pilots will suggest 2 to one, some as far as 3 to 1. So 40 oz X 2 = 80 oz 0 oz.Add. 20% ending with 96 oz of thrust needed. If you have something near that, say 90 to 140 oz. Try it, you can always exchange a stronger motor. If the suggested prop for the motor is say 12X6, start with a 12X4. Lower pitch will draw less watts and slow things down a Little, advantage pilot. Always check pour motor-prop decisions with a watt meeter, alwas, always!! I always use a 4 or 3.5 pitch prop to slow things down. ( really old guy) If you really want to check things out, tie a fish scale to the aircrafts tail and run hur up. Enjoy
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