death of a raptor, WHY?

3dee · #1 06-03-2007, 03:18 AM

Hi all, I need to tell some one and you are the ones to tell I know you will understand. I moved up to a raptor 90 four months ago and its being great. after a repair due to a bad auto I did, went to the flying site to trim and test fly. after an hour of trimming and setting up I had got it flying better than ever before. more people gept coming and the more I pushed it. but for some reason i lost tail control while an inverted hover and it came down so hard it bounced up six feet into a hedge. the result is all servos have gears stripped and there are no parts that can be reused. the quick uk shaft was bent almost 90 degrees. the steel side plates may be ok but the rest of the frame is broke or split. ... WHY WHY WHY?? I can not find why i lost the tail did not even find the batteries and most of the parts that might of being the problem are smashed up. any ideas. oh and do you know any one selling an se90 cheap. thanks lads going off to finish that bottle i half drank last night.

Aztek1701 · #2 06-04-2007, 12:38 AM

Hi mate,

Just tail control? or everything, if it was everthing could it have been a PCM lockout? if it was just the tail maybe something got caught in the tail pitch slider. Rudder linkage?, tail servo?. Another possibility... Thrust washers in the tail grips round the wrong way?

Just brainstorming here cos without doing a post mortem on the heli its really hard to tell.

Take care and sorry to hear about it. My Sceadu 30 went in yesterday too as a result of an unexplained blade flutter. Damage on that is bad too (not as bad as yours) but I think I witnessed an in flight boom strike cos the boom was cut clean off.

Cya... Azzy

3dee · #3 06-04-2007, 09:05 AM

Cheers for the information on what it might of being. i had changed gears in gearbox so i could of put something back wrong but i had being flying all day with no problems. then suddenly no tail. just a thought, is it possible to get back the right way up from inverted while piro-ing flat out. That made me think... i not only lost tail but the servo went all the way to one side. I think it could of being the batteries, problem is i can not find them so cannot check them... no matter i will rebuild her as soon as i get some more money.

Aztek1701 · #4 06-04-2007, 12:22 PM

Hi again,

The only way out of that I can think of would have been to kill the engine and try to auto it in.

Another possibility is that the servo stripped gears. What about a broken tail pitch fork that was cracked when you brought it to the field?.

Take care... Azzy

3dee · #5 06-04-2007, 11:34 PM

thanks for the reply.I checked the gears in tail servo, but as it landed tail first then while still inverted slapped the head down can not say if they were stripped in the air or on impact, I could not find the tail blades. it came down on a path running along side the field, its grass but due to the dry spell it was hard and thats what made the impact so hard it bounced six feet of the ground into a hedge. the hedge has a large ditch below it and is too thick to get to the ditch so any parts in there have to stay there. my two 2500 amh 4.8v are in there as well. I had them in parallel giving me 5000 amh.thanks anyway, I will be rebuilding her when i have all the parts together, she will fly again.

SKMoss · #6 06-05-2007, 10:32 AM

Was the half bottle before or after the crash.

I was having a problem with a servo just going nutty on my Axe. I though it was servo, because when i moved the plug from one channel to another the same servo would cause a problem. What it ended up being was a connection that was wiggling loose. Fixed it and no problem any more.

3dee · #7 06-05-2007, 01:30 PM

will take note of the servo connection when i rebuild. and yes the bottle was a getting over the loss of the raptor and not the cause, thanks for that it made me smile. I do love to fly hard and with the wages i get i am sailing close to the wind, so when it goes down its painful, but when it happens and you don't know why, it is harder to take, its not like i was flying badly and crashed it i was flying well and having a great time when it happened. never mind i am not the first or last to smash a helly but i still have the planes but they are not quite as much fun.

tilburyboy · #8 07-03-2007, 11:34 PM

Hi,

If you have ut trim into your rudder, this can make it travel to full left or right without input, also your end points may be set with to much travel, the blades can move to far and twist in the opposite direction, this makes them lock and would cause your servo to strip.

Regards.

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