Futaba GV1 not too good!

[martin]

I fitted one of these to my Raptor 30 V2 with an Irvine 36 F1 engine and
Weston full tuned pipe.
I am using a Futaba FF8 Super Tx.

It works ok when hovering - you can adjust the head speed from the Tx, but
when doing flips (and when climbing out then reducing the pitch to 0 degrees
to let the heli freefall) the head speed goes way above what it should!

I set it for 1800 rpm for 3D but at the end of the flight the max speed
reading was 2250!

Not at all impressed with it!

Martin.

[Andy Carpenter]

"martin" <fluffy@fluffyman.fsnet.co.uk> wrote in message
news:3efcc35b$1@news.greennet.net...
> I fitted one of these to my Raptor 30 V2 with an Irvine 36 F1 engine and
> Weston full tuned pipe.
> I am using a Futaba FF8 Super Tx.
>
> It works ok when hovering - you can adjust the head speed from the Tx, but
> when doing flips (and when climbing out then reducing the pitch to 0
degrees
> to let the heli freefall) the head speed goes way above what it should!
>
> I set it for 1800 rpm for 3D but at the end of the flight the max speed
> reading was 2250!
>
> Not at all impressed with it!
>
> Martin.
>
>

Have you set it up correctly ? Sound like either you haven't, or you have
thrown a magnet and the governor isn't actually working anymore.
Check the sensor is still registering OK, and check you don't have the
throttle override function turned on (this gives precedence to the curve
over the governor above high throttle stick settings)

I have used governors on all my helis and never had this problem. The only
time I have ever seen it was when a magnet was lost and the governor
therefore wasn't working

Carps

[martin]

It says in the manual that a tuned pipe gives a non linear throttle response
and the governor can't seem to deal with this!

"martin" <fluffy@fluffyman.fsnet.co.uk> wrote in message
news:3efcc35b$1@news.greennet.net...
> I fitted one of these to my Raptor 30 V2 with an Irvine 36 F1 engine and
> Weston full tuned pipe.
> I am using a Futaba FF8 Super Tx.
>
> It works ok when hovering - you can adjust the head speed from the Tx, but
> when doing flips (and when climbing out then reducing the pitch to 0
degrees
> to let the heli freefall) the head speed goes way above what it should!
>
> I set it for 1800 rpm for 3D but at the end of the flight the max speed
> reading was 2250!
>
> Not at all impressed with it!
>
> Martin.
>
>

[martin]

When i rotate the fan i get a sensor reading of 91 percent, so the magnet is
ok and the
throttle override function is turned off.
It appears it can't cope with a tuned pipe being fitted as it's a non linear
power curve.
Martin.


"Andy Carpenter" <andy@REMOVEcarpsTHE.coUPPER.ukCASE> wrote in message
news:bdi6lh$cn6$1@sparta.btinternet.com...
>
> "martin" <fluffy@fluffyman.fsnet.co.uk> wrote in message
> news:3efcc35b$1@news.greennet.net...
> > I fitted one of these to my Raptor 30 V2 with an Irvine 36 F1 engine and
> > Weston full tuned pipe.
> > I am using a Futaba FF8 Super Tx.
> >
> > It works ok when hovering - you can adjust the head speed from the Tx,
but
> > when doing flips (and when climbing out then reducing the pitch to 0
> degrees
> > to let the heli freefall) the head speed goes way above what it should!
> >
> > I set it for 1800 rpm for 3D but at the end of the flight the max speed
> > reading was 2250!
> >
> > Not at all impressed with it!
> >
> > Martin.
> >
> >
>
> Have you set it up correctly ? Sound like either you haven't, or you have
> thrown a magnet and the governor isn't actually working anymore.
> Check the sensor is still registering OK, and check you don't have the
> throttle override function turned on (this gives precedence to the curve
> over the governor above high throttle stick settings)
>
> I have used governors on all my helis and never had this problem. The
only
> time I have ever seen it was when a magnet was lost and the governor
> therefore wasn't working
>
> Carps
>
>

[Steve Simpson]

> It appears it can't cope with a tuned pipe being fitted as it's a non linear
> power curve.

How fast is the throttle servo you are using?

Sounds like the throttle is not reacting fast enough to check the rev when the head unloads.

[Rhodesst]

Martin,

The throttle response with a tuned pipe can be a problem. I have had instances
with the GV1 where it was overspeeding under some circumstances and not others.
One way that I found around this was to reset the idle, high, and engine cut
points in the governors control box.

I had originally ran the helicopter and set it for a nice reliable idle and
then activated the GV1 and set the program points. It worked very well except
for the occational overspeed. At someone elses recommendation, I reset the
idle point in the governor 3 to 4 clicks lower than the idle point I originally
set. This made all the difference in the world. Apparently, the governor will
only pull the throttle down so far based on the idle program position and my
machine needed just a little more.

I don't know if this will help you or not but it's something to try.

Good luck & Fly Safe,
Steve R.

[MrBonk]

Yep....this was going to be my suggestion too.....reset the end points (or
limit points or whatever you want to call them) to give the GV1 more range
so it can pull the throttle down further.

MrBonk
www.mrbonk.com

"Rhodesst" <rhodesst@aol.com> wrote in message
news:20030627212038.13597.00001003@mb-m11.aol.com...
> Martin,
>
> The throttle response with a tuned pipe can be a problem. I have had
instances
> with the GV1 where it was overspeeding under some circumstances and not
others.
> One way that I found around this was to reset the idle, high, and engine
cut
> points in the governors control box.
>
> I had originally ran the helicopter and set it for a nice reliable idle
and
> then activated the GV1 and set the program points. It worked very well
except
> for the occational overspeed. At someone elses recommendation, I reset
the
> idle point in the governor 3 to 4 clicks lower than the idle point I
originally
> set. This made all the difference in the world. Apparently, the governor
will
> only pull the throttle down so far based on the idle program position and
my
> machine needed just a little more.
>
> I don't know if this will help you or not but it's something to try.
>
> Good luck & Fly Safe,
> Steve R.

[martin]

i will try that today, thanks
martin.

"Rhodesst" <rhodesst@aol.com> wrote in message
news:20030627212038.13597.00001003@mb-m11.aol.com...
> Martin,
>
> The throttle response with a tuned pipe can be a problem. I have had
instances
> with the GV1 where it was overspeeding under some circumstances and not
others.
> One way that I found around this was to reset the idle, high, and engine
cut
> points in the governors control box.
>
> I had originally ran the helicopter and set it for a nice reliable idle
and
> then activated the GV1 and set the program points. It worked very well
except
> for the occational overspeed. At someone elses recommendation, I reset
the
> idle point in the governor 3 to 4 clicks lower than the idle point I
originally
> set. This made all the difference in the world. Apparently, the governor
will
> only pull the throttle down so far based on the idle program position and
my
> machine needed just a little more.
>
> I don't know if this will help you or not but it's something to try.
>
> Good luck & Fly Safe,
> Steve R.

[Beav]

"martin" <fluffy@fluffyman.fsnet.co.uk> wrote in message
news:3efccd1d@news.greennet.net...
> It says in the manual that a tuned pipe gives a non linear throttle
response
> and the governor can't seem to deal with this!

The problem won't be the governor, it'll be either

A) The carb setting is slightly too lean causing the engine to "hang" on the
pipe.
B) The pipe's too short causing the same "hanging" thing
3) Your idle position setting on the governor too high, which stops the
throttle barrel from REALLY coming back to the point where it can properly
let the engine off the pipe.
4) The engine is getting too hot.

Unless you've got a faulty governor, they work as well with a pipe as
without one (better even). ALL my governed engines have pipes and I went
through a similar thing with a new engine/pipe so I did the initial running
in with the gov turned off. After a few tanks of juice through the motor,
things took a decidedly better turn and the gov got switched back on again,
and that's how it's remained.


--
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

[martin]

Ok, tested out again, adjusted the governor a bit more, without it the
head speed got up to 2450rpm! with the governor properly setup the head
speed max was 2000 rpm

cool stuff!
martin.


"martin" <fluffy@fluffyman.fsnet.co.uk> wrote in message
news:3efd5aae$1@news.greennet.net...
> i will try that today, thanks
> martin.
>
> "Rhodesst" <rhodesst@aol.com> wrote in message
> news:20030627212038.13597.00001003@mb-m11.aol.com...
> > Martin,
> >
> > The throttle response with a tuned pipe can be a problem. I have had
> instances
> > with the GV1 where it was overspeeding under some circumstances and not
> others.
> > One way that I found around this was to reset the idle, high, and
engine
> cut
> > points in the governors control box.
> >
> > I had originally ran the helicopter and set it for a nice reliable idle
> and
> > then activated the GV1 and set the program points. It worked very well
> except
> > for the occational overspeed. At someone elses recommendation, I reset
> the
> > idle point in the governor 3 to 4 clicks lower than the idle point I
> originally
> > set. This made all the difference in the world. Apparently, the
governor
> will
> > only pull the throttle down so far based on the idle program position
and
> my
> > machine needed just a little more.
> >
> > I don't know if this will help you or not but it's something to try.
> >
> > Good luck & Fly Safe,
> > Steve R.
>
>