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HelicopterThunder TigerOther › Raptor 50 wont take off
11-26-2006 08:32 AM  11 years agoPost 1
Saleh

rrVeteran

Kuwait

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im having this realy odd issue since i have installed the kasama head my pitch rang is +10/-10 and guess what the heli wont take of the ground and my head speed was 1930 could some1 please help me

If you aint crashing you aint flyin

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11-26-2006 09:14 AM  11 years agoPost 2
Arky

rrApprentice

Corfe Mullen, Dorset, UK

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u cant have +10 and 1930 hs with no take off must be somit up with radio setup maybe curves are all 50 50 50 50 50 ? are u using idle up? if so check your pitch curve in them

Possible cause >

1 heli setup mechanical

2 radio setup end points or curves

3 No Main Blades ? :d

Recheck your setup

Jason

Wee.Splat

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11-26-2006 09:16 AM  11 years agoPost 3
raptor50luvver

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Dorset UK

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Can only be pitch related,if you have blades attatched and they are fitted the correct way round,and they are turning at 1900 rpm they must be producing lift

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11-26-2006 11:29 AM  11 years agoPost 4
Saleh

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Kuwait

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its driving me crazy there is no cause
when ever i set it on the bench check every thing and it works perfect even let my friends check it out and its driving them crazy as well

If you aint crashing you aint flyin

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11-26-2006 11:36 AM  11 years agoPost 5
raptor50luvver

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Dorset UK

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It must be the work of supernatural forces then

If you are getting up to 10 degrees pitch with a 1900 headspeed and it wont take off then something has got to be wrong

Is the headblock bolted to the mast?

Im not being funny but i have seen a heli that wouldnt lift off,the headspeed didnt sound right for the engine speed when put under load ie adding pitch for takeoff

It turned out he had put the headbolt thru the head,then dropped it onto the mast so it only went as far on as the bolt would allow and then tightened the bolt to basically clamp the head onto the mast so effectively there was no solid drive connection there

Have you cheacked the headspeed as its actually running on the ground trying to lift off?

If the pitch curve is giving you 10 degrees positive and say 5 midstick then at 1900 it should hover midstick roughly

headspeed and pitch equals lift so its got to fly

If it still does it please try and video it and let everyone see

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11-26-2006 11:39 AM  11 years agoPost 6
Saleh

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Kuwait

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it took of the groud but maybe only 2m high as a max

If you aint crashing you aint flyin

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11-26-2006 12:07 PM  11 years agoPost 7
Yug

rrMaster

UK. Herts

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Binding ???
Perhaps you put something together wrong, and when the head is spooled up, the various forces are causing binding somewhere, preventing the mechanics from moving freely and hence preventing full travel on the collective.

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11-26-2006 12:10 PM  11 years agoPost 8
Krunder

rrNovice

Denmark

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Have you installed your thrust bearings correctly?

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11-26-2006 12:25 PM  11 years agoPost 9
Saleh

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Kuwait

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yes and why does it make any diffrance

If you aint crashing you aint flyin

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11-26-2006 12:30 PM  11 years agoPost 10
nivlek

rrProfessor

Norfolk England

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yes and why does it make any diffrance
If the thrust bearings are reversed the head can simply lock up , making pitch changes impossible .

At the end of the day , it gets dark .

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11-26-2006 06:38 PM  11 years agoPost 11
raptor50luvver

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Dorset UK

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Why would it only climb 2 metres

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11-26-2006 06:42 PM  11 years agoPost 12
nivlek

rrProfessor

Norfolk England

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Why would it only climb 2 metres
Sounds like it's sitting on it's downwash .

At the end of the day , it gets dark .

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11-26-2006 06:45 PM  11 years agoPost 13
jjeaster222000

rrVeteran

Bedford in

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did you check your pitch servo direction? maybe you need to reverse it? just a thought

Team Synergy

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11-26-2006 06:55 PM  11 years agoPost 14
raptor50luvver

rrKey Veteran

Dorset UK

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No it would just push iteslf into the ground if the pitch servo was going the wrong way

Please try to get it on video and let us see it,make sure you get good sound so we can hear the engine

She aint too rich is she?....Unlikely though if the head is actually doing 1900

Just thinking aloud

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11-26-2006 07:02 PM  11 years agoPost 15
soulrider911

rrVeteran

Novato Ca

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no lift off

I would seriously check your collective servo, is it old, weak etcc...this could be it, becaue sitting on the bench under no load, it will give you your full pitch range, but try to apply somw force against the servo see if it still pushed hard against your force, if it feels weak it might be that

Why don't cats get gray hair with age?.....

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11-27-2006 12:48 AM  11 years agoPost 16
rich afflerback

rrApprentice

willingboro nj

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If your running wood blades youve got a blade thats broke in the grip and it means its time to replace the blades before it throws one I've seen it twice

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11-27-2006 02:11 AM  11 years agoPost 17
Charrua

rrApprentice

Suwanee, GA

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I agree with sould rider it might be something on the collective servo not having the torque it needs,,the heli it should even lift off even with the head speed very low at 10+ deg,,, I know that becasue when I do an auto and it almost stop if you hit full up pittch with engine off and it will jump off the ground a bit. so even at very low head speed it should at least lift off.

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11-27-2006 02:12 AM  11 years agoPost 18
rcadd1ct

rrElite Veteran

Richardson, Texas

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Check thrust bearings in the head.

-RCA .......... Making Cuisinarts Fly!!!!!!!

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11-27-2006 04:46 AM  11 years agoPost 19
MickeyMoo

rrApprentice

Ohio

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Whatever the problem please post the findings... this is starting to drive me crazy too

I need to review my Newtonian physics but 1900 rpm and +10 degrees pitch should be enough to cause an opposite yet unequal force on that heli

Good luck

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11-27-2006 12:57 PM  11 years agoPost 20
raptor50luvver

rrKey Veteran

Dorset UK

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He said it lifts off about 2 metres...

Cant be a servo problem,if it gives it pitch to get airbourne why would it stop at 2 metres if the servo was weak

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HelicopterThunder TigerOther › Raptor 50 wont take off
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