Hirobo GPH 346

Hirobo GPH 346

Post by mone » Fri, 26 Nov 1999 04:00:00



Does anybody out there fly the gph and if so what tail system is the best

 
 
 

Hirobo GPH 346

Post by Phil Col » Fri, 26 Nov 1999 04:00:00


I have the wire drive with a Century torque tube upgrade.

Two things I don't like about it:
1. The tail rotor pitch throw is extremely assymteric. If
   I use 90 mm blades I can get enough out of it in both directions.

2. The gears in the rear gear box seem to break just about every
   time I hit the ground with with the tail rotor, See #1 for why it
   happens a lot. Of course my clumsy flares have something to
   do with it :).

I have not had the opportunity to try the belt drive. The rear
gearbox (pulley holder, really) looks awfully like a Shuttle's,
and those have nice symmectrial tail rotor throws.

Quote:

> Does anybody out there fly the gph and if so what tail system is the best


--
Phil

 
 
 

Hirobo GPH 346

Post by alie.. » Sat, 27 Nov 1999 04:00:00


I too have the GPH 346 and its one great heli.  Depending on your
flying style and skill get the belt drive or the torque tube one. I
would not get the wire driven one cause the wire has a tendency to flex
plus the wire guide they give is not very good.  The belt drive is just
like the shuttle, everything is from the frame back except the actually
tail pitch bellcrank and the pitch plate.  As far as you breaking the
gears everytime you touch why don't you add a wire to your fin or make
a larger fin so your blades do not touch the ground. I have and it
works out great!  Feel free to contact me if you like.
good luck
taus



Quote:
> I have the wire drive with a Century torque tube upgrade.

> Two things I don't like about it:
> 1. The tail rotor pitch throw is extremely assymteric. If
>    I use 90 mm blades I can get enough out of it in both directions.

> 2. The gears in the rear gear box seem to break just about every
>    time I hit the ground with with the tail rotor, See #1 for why it
>    happens a lot. Of course my clumsy flares have something to
>    do with it :).

> I have not had the opportunity to try the belt drive. The rear
> gearbox (pulley holder, really) looks awfully like a Shuttle's,
> and those have nice symmectrial tail rotor throws.


> > Does anybody out there fly the gph and if so what tail system is
the best

> --
> Phil

Sent via Deja.com http://www.deja.com/
Before you buy.
 
 
 

Hirobo GPH 346

Post by alie.. » Sat, 27 Nov 1999 04:00:00


Also I have changed my tail pitch plate cause I Hate the "H" links that
hirobo uses (just no use for them when you can use ball links).  Its
easy to do and works great. Its made out of tup-per-wear stuff (sorry
can't spell) and a kyosho brass insert w/ nut. I have pic if you like.
Let me know
taus


Quote:

> I too have the GPH 346 and its one great heli.  Depending on your
> flying style and skill get the belt drive or the torque tube one. I
> would not get the wire driven one cause the wire has a tendency to
flex
> plus the wire guide they give is not very good.  The belt drive is
just
> like the shuttle, everything is from the frame back except the
actually
> tail pitch bellcrank and the pitch plate.  As far as you breaking the
> gears everytime you touch why don't you add a wire to your fin or make
> a larger fin so your blades do not touch the ground. I have and it
> works out great!  Feel free to contact me if you like.
> good luck
> taus



> > I have the wire drive with a Century torque tube upgrade.

> > Two things I don't like about it:
> > 1. The tail rotor pitch throw is extremely assymteric. If
> >    I use 90 mm blades I can get enough out of it in both directions.

> > 2. The gears in the rear gear box seem to break just about every
> >    time I hit the ground with with the tail rotor, See #1 for why it
> >    happens a lot. Of course my clumsy flares have something to
> >    do with it :).

> > I have not had the opportunity to try the belt drive. The rear
> > gearbox (pulley holder, really) looks awfully like a Shuttle's,
> > and those have nice symmectrial tail rotor throws.


> > > Does anybody out there fly the gph and if so what tail system is
> the best

> > --
> > Phil

> Sent via Deja.com http://www.deja.com/
> Before you buy.

Sent via Deja.com http://www.deja.com/
Before you buy.
 
 
 

Hirobo GPH 346

Post by Phil Col » Sun, 28 Nov 1999 04:00:00


Taus,

I wouldn't mind seeing what you've done. The links I have have
ball links on the blade grip end, and seem OK. It would be
nice to get the throw symmetrical, though.

Quote:

> Also I have changed my tail pitch plate cause I Hate the "H" links that
> hirobo uses (just no use for them when you can use ball links).  Its
> easy to do and works great. Its made out of tup-per-wear stuff (sorry
> can't spell) and a kyosho brass insert w/ nut. I have pic if you like.
> Let me know
> taus


Thanks,
--
Phil
 
 
 

Hirobo GPH 346

Post by Phil Col » Sun, 28 Nov 1999 04:00:00


Quote:

> I too have the GPH 346 and its one great heli.  Depending on your
> flying style and skill get the belt drive or the torque tube one. I
> would not get the wire driven one cause the wire has a tendency to flex
> plus the wire guide they give is not very good.  The belt drive is just
> like the shuttle, everything is from the frame back except the actually
> tail pitch bellcrank and the pitch plate.  As far as you breaking the
> gears everytime you touch why don't you add a wire to your fin or make
> a larger fin so your blades do not touch the ground. I have and it
> works out great!  Feel free to contact me if you like.
> good luck
> taus

I do have a longer tail fin. I have discovered the standard
clamp is not all that secure when I make that "special" effort
to crunch the tail. One of these days I'll fix it. All I need
is for someone to send me a 'round tuit' :)

--
Phil

 
 
 

Hirobo GPH 346

Post by Peter Christ » Sun, 28 Nov 1999 04:00:00


The belt drive is much better. The standard wire or torque drive has a very
assymetric pitch linkage. Its OK for cruising around, but no good for
backwards stuff or serious aerobatics. The belt drive version uses well
proven Shuttle parts and is fine.

Pete