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JR-Spektrum . Gyro Hobbies . E-flite

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Century Hawk - Falcon - Raven - Predator > amazing just amazing
 
 
toner123
Heliman
Location: norfolk, va

I was flying my heli yesterday and it was a a hot day at around 98 deg, so i was constantly checking the temp on my engine to make sure i wasn't running hot. So after less then a 1/4 tank i stopedit checked the temp, the temp was a little high so i richened it up and got the temp a little bellow 200 deg. I shutdown let the engine cool started back up and repeated this procedure and engine temp stayed a little bellow 200 deg so i started flying around just fwd flight nothing really hard. All of a sudden i bring the helo to a hover and bamb the engine died and my heli free fell like 6 feet and smacked the ground! So i walk over to it to see the damage and i broke the tail boom, bent the tq tube, busted the blade grip(have the full metal head by century) and busted my CF blades. Well to get to the point my toki 40 engine decided to lock up but the part that is driving me crazy is I dont understand why. Later on ill try to post pics just wanted to share my story
06-09-2008 10:52 AM
 
 
thelane
Senior Heliman
Location: Edmonton, Alberta Canada

That is a REAL sh!tty situation man! I can not explain why this would happen other than, you were already running boarder-line rich and when you made that adjustment, you were then running too rich and the engine died. Maybe if you had ALSO increased the headspeed (throttle curve) a bit as well?

I feel for ya man,
~Lane

JR Vibe 50 and DX7
06-09-2008 03:29 PM
 
 
oldfart
Elite Veteran
Location: Vancouver, Canada

What were your needle settings on the carb - sounds like it was too lean or your throttle curve was not properly matched to your pitch curve or a combination of both.
06-09-2008 06:15 PM
 
 
toner123
Heliman
Location: norfolk, va

all my needle settings were fine and so were T curves and P curves been flying with the same ones for a while now with no issue at all. I think something in the motor just went bad so when i get a chance i am goin to rip it apart to see
06-09-2008 10:49 PM
 
 
toner123
Heliman
Location: norfolk, va

well took the engine apart and wow lol. piston is in wonderful condition clearly visiable that the engine was running cool no black or any dark color on it what so ever, their is even a green stain on the piston from my cool power 15%. When i riped the back plate off thats where hell started. The rear bearing broke had metal pieces about 5mm all over, but come to find out my engine didnt actully melt it self, one of the ball bearings from the rear bearing was wondering around in their and the connecting rod got a hold of it and slammed it into the case and and it got wedged so thats why the engine quit lol, Not really sure what to do engine is less then 6 months old so I think I am going to try and contact the manufactor because i believe it was a faulty part
06-15-2008 08:50 PM
 
 
centuryman
Veteran
Location: deerriver,mn usa

i had the hyper 50 in my raven seize up from to lean of a mixture. i autoed it in from 200 plus feet up no damage. 6 feet should'nt be tough to auto from.
06-16-2008 03:50 AM
 
 
toner123
Heliman
Location: norfolk, va

yea but i had like no head speed like i landed on the skids but the higher you are from my undersyanding easier it is to auto because as you come down your building more head speed but i do need to practice autos what hurt me was the bounce i did on the ground lol
06-16-2008 04:01 AM
 
 
centuryman
Veteran
Location: deerriver,mn usa

from 30 feet up you have enough headspeed to land without any fancey auto manuvers. i've done it hundred times if i've done it once.
06-16-2008 04:23 AM
 
 
helihell
Senior Heliman
Location: Canada

Altitude = stored energy, too low of a head speed and to low to the ground is harder to auto than higher up.

Tough break !

DOH!
06-16-2008 06:20 AM
 
 
toner123
Heliman
Location: norfolk, va

wow centuryman what are you trying to prove to me lol I already said i need to start working on autos but I was not 30 feet I was 6 feet their is a big differance in those 2 altitudes I can assure you it is harder to do autos at 6 feet then it is at 30 feet as helihell stated O i am also sure it is easier to auto a 50 then it is a 30
06-16-2008 04:26 PM
 
 
Blade_Master1
Veteran
Location: Canada

unexpected auto from 6 feet up near impossible for a pro

I'm not a pro and very few people flying Hawks are pro's

Hope toki does right by you
and if they don't go with OS

I overheated my 37 a couple of times, still runs probably could use a new ring though

JM2C's :)
06-16-2008 09:47 PM
 
 
Dilbeck
Key Veteran
Location: Springdale Arkansas

Its not the 6 feet, Jeese hit hold at 6 feet and dont touch anything then work the flare. Its the reaction time! At 6 feet you have to have already had your finger on the switch and was going to flip it anyway.
Like BladeMaster said UNEXPECTED.

If it doesn't fly sell it!
06-17-2008 02:14 AM
 
 
toner123
Heliman
Location: norfolk, va

Well I hope that they take care of me also. I bought the engine from heli-world.com so yesterday i sent them an email telling them all about what happen and asking who i need to contact about it to get it resolved just think it was work menship error and not mine from what i found out when i took the engine apart, But yea if they arent goin to do right by this then I am going to go back to a OS 37. No point in investing anymore in a company if their not going to stand by their product. Although the power the engine put out was nice, I had a good amount of power more then my OS 37, but we will see what happen,still waiting for a reply from heli-world
06-17-2008 04:07 AM
 
 
centuryman
Veteran
Location: deerriver,mn usa

i guess i've had lots of practice from my early days of learning to fly by myself,and lean seizeing lots of motors.

For me it was the 30 to 100 feet witch was no mans land for auto's till recently i finally got up the nerve to practice those.

you're right about reaction time is everything.the instant you here the motor die you need to zero the pitch to save energy and then just flare nice and gradual. I actully like to land my nitros that way now.on a 3d setup it's actully easier to land off power because as the headspeed decreases so does the sensitivitey of the pitch, witch can be pretty touchy on a 3d heli.the key is haveing a heli with a driven tail,otherwise you need some forward speed to keep the tail strait.
06-17-2008 04:14 AM
 
 
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Century Hawk - Falcon - Raven - Predator > amazing just amazing
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