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Just finished building my 3D-Hawk from Nitroplanes. It went together well but it was a little bit more difficult than I thought. Anyways one servo was DOA and I replaced it with a 9G for the ailerons. After building the whole plane and installing electronics the elevator servos is starting to go. It is twitching really bad if it responds at all. Anyways I have an e-mail in to get two new servos from them. Maiden will have to wait until I get the new servos and the damn wind stops here. We were topping out at 30 mph again. Anyways here are the photos of my Hawk. I really like it and hope it will help me learn how to fly 3D.
Weight: 166 grams without any battery 196 grams with the stock 500mah battery 214 grams with a Skylipo 800 mah battery |
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Alright so finally got to maiden my 3D-Hawk. It flew pretty well. I was having so much fun messing around with it that I dropped my battery down to 3.5v per cell. Anyways I noticed that during my second and last flight that the motor/vibrating was getting really loud. I went home and noticed that the housing on the motor is loose. Not sure how to fix this since it is held on with a lock washer from the motor shaft. I was messing with it on the bench and without the prop on it was not vibrating at all; with it on it was really bad and then I heard a pop and almost got a prop in the face! The motor broke loose of the foam and epoxy!
Now here comes my questions. Do you think the motor vibration is from the motor not being secured well enough in the nose? I purchased some balsa and plan on reinforcing the area where the motor mounts onto the plane. I used epoxy to initially hold the motor on because I thought CA would not be strong enough and I have had issues with gorilla glue expanding into areas I did not want it to. Or could it be how the prop was being held on by the propsaver? I have never used a prop saver before so that whole thing is new to me. Or third is it the motor itself? I am already trying to talk with Nitroplanes about getting two new servos that were DOA when the plane arrived so having to deal with them about a new motor is not something I want to do. Might just have to get a new one. Any input would be great. Thanks guys. |
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what flight times are you guys getting out of a 2s 500mah lipo?
Im only getting about 3mins tops, is this right. My motor is flat out the whole time while im doing loops, rolls and spins. I love this plane even though i got it stuck in a tree for two days because the lipo fell out of the plane and i could only glide it. Got it back but needs a bit of fixing up but it will be fine. |
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United Kingdom, England, Saffron Walden
Joined May 2008
124 Posts
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Quote:
The vibration is caused by the prop not being well enough centred on the prop saver. Prove this to yourself by having everything except the prop and O ring and running the motor up. I found the prop hole to be too large to be a tight fit on the prop saver shoulder and the rear face of the prop to be rough from the molding process. I carefully file the back face of my props (only use 8x4.3 SF) to be smooth. It's not perfect but cuts the vibration down a lot. Never found a prop maker & prop saver maker combination for this plane/motor/shaft diameter where it is a tight, true fit. PS see my post #194 for some pics retiredbri |
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