Raptor 30 V2 - newbie quesion - throttle problem?

Hello, and let me apologize in advance for probably a stupid question.

Anyways, I have a new Raptor 30 V2 with the TT39 engine. I've put about 4
hours on it so far and it has flown great until today. First flight today
would hardly get off the ground at full throttle. I sat it down and pinched
the fuel hose a few times to rev up the eninge and seemed better. It lifted
off fine as it should.
Second flight, after refueling same thing, would not hardly get off the
ground at full throttle and never did so I brought it back in the garage for
the day.

I am trying to fugure this out but it's very frustrating! Any advice would
be most appreciated. Thanks

[kodi]

OK here goes... a newbie answering a newbie.

I got a Raptor 30 v2 last spring. It has the OS 32 and I fly it with my
Futaba 9C. I'm well into FF thanks to G2. As to your problem... If the
engine is throttleing up to full and it sounds like its running at a
reasonable RPM then you should have power. Maybe the engine is running a
little rich if pinching the line made it better momentarly. If the engine
is developing power maybe the power is not being transfered to the rotor.
If you can, check your clutch. I don't think its hard to drop the engine to
inspect the clutch bell and liner. Check the liner for glazing and heat
damage. Make sure its still fastened to the bell. If the power is being
transfered then check the radio/mixing and servos/rotor for proper travel.
If everything seems to be in order. Find someone with a tachometer and
check your head/rotor speed. Hope this helped or at least gave you some
ideas.
Good luck


<d@d.net> wrote in message news:c09fjc0pg3@enews3.newsguy.com...
> Hello, and let me apologize in advance for probably a stupid question.
>
> Anyways, I have a new Raptor 30 V2 with the TT39 engine. I've put about 4
> hours on it so far and it has flown great until today. First flight today
> would hardly get off the ground at full throttle. I sat it down and
pinched
> the fuel hose a few times to rev up the eninge and seemed better. It
lifted
> off fine as it should.
> Second flight, after refueling same thing, would not hardly get off the
> ground at full throttle and never did so I brought it back in the garage
for
> the day.
>
> I am trying to fugure this out but it's very frustrating! Any advice would
> be most appreciated. Thanks
>
>

[Tim]

d@d.net wrote:
> Hello, and let me apologize in advance for probably a stupid question.
>
> Anyways, I have a new Raptor 30 V2 with the TT39 engine. I've put
> about 4 hours on it so far and it has flown great until today. First
> flight today would hardly get off the ground at full throttle. I sat
> it down and pinched the fuel hose a few times to rev up the eninge
> and seemed better. It lifted off fine as it should.
> Second flight, after refueling same thing, would not hardly get off
> the ground at full throttle and never did so I brought it back in the
> garage for the day.
>
> I am trying to fugure this out but it's very frustrating! Any advice
> would be most appreciated. Thanks

What have you changed since it flew OK? Are you SURE you haven't changed
something?

I'm a relative newcomer to this hobby, but I have the same set up as you. I
wonder if the engine is running too rich and then, as the tank empties, a
reduction in "head" causes the engine to lean out (so it works). I have a
header tank fitted on my Raptor, so as long as I don't run the main tank
completely empty, I don't have that problem. Other things to check are the
fuel line (for splits etc), filter (if fitted) and the pressure return from
the silencer - is the nipple on the silencer blocked? Also, does the
throttle have full and unhindered movement? Another possibility is that one
or other of the needles on the carb has vibrated to a new position.
Unlikely, but possible.

Just my thoughts and I'm sure more experienced flyers will have further
ideas.

Tim


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[david]

Since your helicopter obeys the laws of physics, and since they are laws,
not options, there is one reason your machine will not fly: it has
insufficient lift.

Sort this by either...leaning the engine off (quite a lot by the sound of
it), or increasing the pitch. make sure you have c -4 to +9 degrees. IF
you have then lean the engine off.

To be honest, the comment about "pinching the fuel line" leads me to say
'wind the needle valve in half a turn'

You dont mention fuel...are you running 10% nitro? You should...at least!
IMHO. OMMV.

David

Ok Update:

Being a newbie (but learning every flight) I didn't realize that the
muffler's bottom screw had came off until further examination last night.
( I purchased the ARF and had a shop check my 10% of the work). Since the
top screw was on but loose the muffler had rotated and melted the top part
of the skid. Since there apparently was a huge loss in pressure, that was
causing my problem. Nothing too serious, and replacing and loc-tite on the
screws did the trick. Today's flight was flawless and I'm once again happy.

Thanks to all that posted replies!


<d@d.net> wrote in message news:c09fjc0pg3@enews3.newsguy.com...
> Hello, and let me apologize in advance for probably a stupid question.
>
> Anyways, I have a new Raptor 30 V2 with the TT39 engine. I've put about 4
> hours on it so far and it has flown great until today. First flight today
> would hardly get off the ground at full throttle. I sat it down and
pinched
> the fuel hose a few times to rev up the eninge and seemed better. It
lifted
> off fine as it should.
> Second flight, after refueling same thing, would not hardly get off the
> ground at full throttle and never did so I brought it back in the garage
for
> the day.
>
> I am trying to fugure this out but it's very frustrating! Any advice would
> be most appreciated. Thanks
>
>