Raptor 50 3D / CSM SL 560
Collin Hart
Can anyone give me a little advice if they have set up a Raptor 30/50 with
either CSM 540 or CSM SL 560 ????
I am building a Raptor 50 and will be fitting a CSM SL 560... My question
is, " What is the best pitch setting for the rudder "
The instructions with the CSM say " set 8 Degrees pitch with rudder
stick/trim at centre "
Thunder Tiger say " set 15 Degrees "
I called Thunder Tiger dealers in U.K. and a guy has set his Raptor at 4
Degrees Pitch for Rudder........
Any advice from anyone who has setup the Raptor with heading Hold Gyro would
be appreciated........
Collin.
Beav
"Collin Hart" <colli...@btinternet.com> wrote in message
news:b5t5im$71t$1...@sparta.btinternet.com...
Raptor, Shuttle, X-cell, whatever, they're all just helicopters and they all
have to obey the same laws of "fizzics". The tail simply has to counter the
torque from the main rotor and that will depend on a lot of variables, not
least (but probably one of the most noticable) is the speed of the rotors,
so.....
If someone needs 15 degrees of tail rotor to hold stop the heli yawing,
they're running some SERIOUS amout of main rotor pitch and some seriously
low rotor revs. Not good.
The average IS around 8 degrees and if you need much more than that and your
rotor speed is at or around the 16-1800rpm mark, then the blades on the tail
are too small.
Set the tail rotor pitch at 8 degrees / centre stick and the mains to 5-6
degrees at centre stick/hover and if the heli won't hold at that, experiment
with blade size, but I doubt you'll need to go to that extreme as a turn or
two on the tail linkage should be enough.
Another "rule of thumb" is to set the tail pitch by folding the tail blades
(one forwards, one backwards) so that the tips are almost touching. Then set
a gap between the tips of around an inch and you're right there in the "ball
park".
--
Beav
Please note my E-mail address is "beavis dot original at ntlworld dot com"
(with the obvious changes)
Beavisland now lives at
www.beavisoriginal.co.uk
raptor30man
i have a raptor 30 with the csm sl 560 gyro great heli but i have had
endless trouble with my csm sl 560 my tail is at 8 degrees i think i
would have been better off with a gy 401 o be honest
--
raptor30man
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Steve R.
news:raptor30m...@rcgroups.com...
>
> i have a raptor 30 with the csm sl 560 gyro great heli but i have had
> endless trouble with my csm sl 560 my tail is at 8 degrees i think i
> would have been better off with a gy 401 o be honest
>
>
> --
> raptor30man
My only experience with CSM gyros is with the early versions. They worked
Ok for the most part but had a bad habit of drifting. It was annoying but
nothing you couldn't live with. I'm not familiar with the 560 CSM you
mention. On the other hand, the Futaba GY401 is one that I've had a lot of
experience with. There are better gyros out there but the 401 is, IMO, one
of the best "bang for the buck" heading hold gyros on the market.
FWIW! :-)
Fly Safe,
Steve R.
raptor30man
i am starting to think my problems may be being caused by some engine
vibration i dont think its running very smooth it is tt 39 and there is
some slop in the big end bearing on the crankshaft. is it worth
rebuilding these engines and if so where can i source parts?
Steve R.
Vibrations issues could very well be causing your problems. I've known a
number of folks through the years that routinely replace engine bearings and
it's not that hard to do. I would think you could order the bearings for
the engine from any reputable hobby shop. I've also seen these issues
improved noticeably by simply relocating the gyro to another spot on the
model, if possible. If you do have bearing going out on the engine, you
really should try to get that taken care of though.
Good luck,
Steve R.