Re: Boom mounted tail servo question

[Aaron]

The way my raptor is set-up with the tail mounted servo I have almost a 45%
tilt on the thing to make it clear the tail slider...... I haven't noticed
any difference in performance, just looks funny when its off kilter.

[Beav]

"Harry Spillett" <harry.spillett@bigfoot.com> wrote in message
news:b6t0kv$hl6$1@newsg4.svr.pol.co.uk...

> >
> > I have to do this with a very high compression Rossi 60 ABC and it's
> worked
> > flawlessly from day 1.
>
> OK, i did have a clamp on the fuel line for a while but removed it when i
> fitted a fueling valve. This has a built in engine cut off to prevent
> pumping the fuel to the engine when refuling.

Is that the Dubro thing? I've had a few of them and given up on 'em too.
they leak and they don't stop all the fuel getting back up the carb line
either. Maybe it's me, but I wouldn't thank you for giving me one.

belive it or not this was
> easer to get hold of than a simple "T" piece which is what i was after.

I got probably 20 "T" pieces in a pack from B&Q or one of them other DIY
places. They're not intended for heli's (got 'em in the plumbing section)
but so what? Cost about 2 quid for the packet.

i
> suppose if i fit the clamp as you suggest and use it to starve the engine
of
> fuel it will be better for the engine right?

It ensures two things Harry. One is the engine doesn't sit with fuel inside
it while it's not being used (causes all sorts of problems in the long term,
specially if you use high nitro fuel) and the other is the hydrolocking
discussed. It's what I do with all my heli's nowadays.


--
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

[Harry Spillett]

Beav

> Is that the Dubro thing? I've had a few of them and given up on 'em too.
> they leak and they don't stop all the fuel getting back up the carb line
> either. Maybe it's me, but I wouldn't thank you for giving me one.

This one is actually the Ripmax valve and "probe" but yes i am sure it is
the same thing. The valve seems to be performing fine at the moment, however
it looks as though i will need to use it in conjunction with a good old cut
off as well to iron out the porblems.

> I got probably 20 "T" pieces in a pack from B&Q or one of them other DIY
> places. They're not intended for heli's (got 'em in the plumbing section)
> but so what? Cost about 2 quid for the packet.

I looked a couple of "T" pisecs that were about the right size, i just
wasent sure how long they would last when in contact with the fuel, i was
even considering nicking one off the fish tank air pump!

> i
> > suppose if i fit the clamp as you suggest and use it to starve the
engine
> of
> > fuel it will be better for the engine right?
>
> It ensures two things Harry. One is the engine doesn't sit with fuel
inside
> it while it's not being used (causes all sorts of problems in the long
term,
> specially if you use high nitro fuel) and the other is the hydrolocking
> discussed. It's what I do with all my heli's nowadays.

At the moment my heli spends more time in storeage than in the air so i will
definetly start using this method of stopping the engine in future to
preserve the inerds

Thanks again Beav,

Harry

[Harry Spillett]

Thanks Al,

> I have got a fairly new R30 V1 with the Quick UK boom mounted tail servo
> Yes, I had the same problem
> The fix:
>
> Looking from tail to front have the servo disk vertically on the RHS.
> The tail gear box is held with 2 * 3 mm bolts attached to the boom.
> It is the bottom one that rubs against the metal end of the carbon pushrod
> as it protrudes from the tail gearbox case.
> The only way to fix it is to carefully grind the head of the bolt down
just
> enough so that you can still use an Allen key.
> This will give you about 1 mm clearance at the tail end when the pushrod
> comes closest to the bolt. This doesn't sound much, but as the end is
> attached to the bellcrank and the carbon pushrod is very stiff, no rubbing
> occurs.
> This also gives you about 5 mm clearance to the tailboom brace.

I may have to give this a try, when I last flew the model it became clear I
would need to squeeze some extra pitch into the tail system to hold the
hover, however as I adjusted the length of the push rod it started to bind
again. you are right, I only need a few extra mm clearance to get the pitch
I want; its just a shame that I will have to muck about with the set-up so
much to achieve this. I hope the Quick UK R&D bods can rectify this in
future it should be much more straight forward to make this kit fit the
model it has been designed for.

Harry

[Beav]

"Harry Spillett" <harry.spillett@bigfoot.com> wrote in message
news:b6vt3i$bkn$1@newsg1.svr.pol.co.uk...
> Beav
>
> > Is that the Dubro thing? I've had a few of them and given up on 'em too.
> > they leak and they don't stop all the fuel getting back up the carb line
> > either. Maybe it's me, but I wouldn't thank you for giving me one.
>
> This one is actually the Ripmax valve and "probe" but yes i am sure it is
> the same thing. The valve seems to be performing fine at the moment,
however
> it looks as though i will need to use it in conjunction with a good old
cut
> off as well to iron out the porblems.

Wait 'til they start "weeping". After they do, just bin 'em coz they're more
trouble than they're worth. I thought they were a great idea (still do) but
having to use their own "probe" (which disappear faster than Saddam from a
restaraunt) and the fact that they fail too quickly, soon made me think it's
still an idea and not a product:-)
>
> > I got probably 20 "T" pieces in a pack from B&Q or one of them other DIY
> > places. They're not intended for heli's (got 'em in the plumbing
section)
> > but so what? Cost about 2 quid for the packet.
>
> I looked a couple of "T" pisecs that were about the right size, i just
> wasent sure how long they would last when in contact with the fuel, i was
> even considering nicking one off the fish tank air pump!

They'll outlast your heli :-) They don't seem to be affected at all by fuel,
even high nitro stuff.

>
> > i
> > > suppose if i fit the clamp as you suggest and use it to starve the
> engine
> > of
> > > fuel it will be better for the engine right?
> >
> > It ensures two things Harry. One is the engine doesn't sit with fuel
> inside
> > it while it's not being used (causes all sorts of problems in the long
> term,
> > specially if you use high nitro fuel) and the other is the hydrolocking
> > discussed. It's what I do with all my heli's nowadays.
>
> At the moment my heli spends more time in storeage than in the air so i
will
> definetly start using this method of stopping the engine in future to
> preserve the inerds
>
> Thanks again Beav,

No worries mate:-)

Beav (who NEVER watches Neighbours:-))


--
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