Piccolo gears, which to use?

Piccolo gears, which to use?

Post by Chris Tricke » Fri, 31 Aug 2001 22:17:24



Hiya!!  Anyone here know the answer to this one please??

There are three small gears to use, one for the main rotor and one for the
back, but which combination should I use?

I have heard that the 9 tooth on the main and 8 on the back is a good one,
most people start with the middle sized ones and work it out themselves, I
thought it best to ask someone who has been flying a while :)

Chris

 
 
 

Piccolo gears, which to use?

Post by Paul Goe » Fri, 31 Aug 2001 23:27:56


On Thu, 30 Aug 2001 14:17:24 +0100, "Chris Tricker"

Quote:

>Hiya!!  Anyone here know the answer to this one please??

>There are three small gears to use, one for the main rotor and one for the
>back, but which combination should I use?

>I have heard that the 9 tooth on the main and 8 on the back is a good one,
>most people start with the middle sized ones and work it out themselves, I
>thought it best to ask someone who has been flying a while :)

Depends on your battery pack.  

For the standard 7 cell 250 mAH NiCd pack, the 9 tooth main pinion and
either the 8 or 9 tooth tail pinion would be good choices.  

Basically, you want as high a gear ration (smallest pinion) as you can
get away with and have acceptable power.  The faster the motor(s) turn
the higher the applied voltage and lower the current draw.  Lower
current means less power wasted as heat and better efficiency.... as
well as reduced brush wear.  

Either the 8 or 9 tooth tail pinion will work, but I have found that
the 9 tooth is quieter.  Make sure that the tail pinion is well CAd on
and that you don't get any CA in the bearing.  Best way I have found
to do that is put a small drop of thick CA on the very end of the
(roughed up) motor shaft.  Then in one smooth motion and while holding
the motor shaft DOWN, push the shaft into the gear and let it set for
maybe 30 minutes (CA takes a while to completely cure).  This way you
don't run the risk of getting CA in the bearing and the CA probably
does not have time to run out the other end of the pinion.  

Some people have been using epoxy instead of CA and report that it
holds better and has far less tendency to run into places where it is
not wanted.  I stick to CA but I am using some stuff that I found in
the car shop that is used for CAing car tires to the rims.  It seems
to work well but I can't say for sure if it is any better than regular
thick CA.

Paul Goelz
pgoelz at eaglequest dot com
Videoastronomy, music and model helicopter website:
http://www.eaglequest.com/~pgoelz

 
 
 

Piccolo gears, which to use?

Post by Chris Tricke » Sat, 01 Sep 2001 06:10:48


Hiya Paul :)

Well I have the bog standard Battery pack, plus two 9.6v 700mah Twincell
Nimh AAA Packs too.

I am also fitting the upgrade kit for out door flying at some point, as I
have the kit, would you recommend starting the Upgraded engine off on the
build NOW or wait until later??

If you now know what im about to do, does this change your opinion of what
gears to use?

Chris


Quote:
> On Thu, 30 Aug 2001 14:17:24 +0100, "Chris Tricker"

> >Hiya!!  Anyone here know the answer to this one please??

> >There are three small gears to use, one for the main rotor and one for
the
> >back, but which combination should I use?

> >I have heard that the 9 tooth on the main and 8 on the back is a good
one,
> >most people start with the middle sized ones and work it out themselves,
I
> >thought it best to ask someone who has been flying a while :)

> Depends on your battery pack.

> For the standard 7 cell 250 mAH NiCd pack, the 9 tooth main pinion and
> either the 8 or 9 tooth tail pinion would be good choices.

> Basically, you want as high a gear ration (smallest pinion) as you can
> get away with and have acceptable power.  The faster the motor(s) turn
> the higher the applied voltage and lower the current draw.  Lower
> current means less power wasted as heat and better efficiency.... as
> well as reduced brush wear.

> Either the 8 or 9 tooth tail pinion will work, but I have found that
> the 9 tooth is quieter.  Make sure that the tail pinion is well CAd on
> and that you don't get any CA in the bearing.  Best way I have found
> to do that is put a small drop of thick CA on the very end of the
> (roughed up) motor shaft.  Then in one smooth motion and while holding
> the motor shaft DOWN, push the shaft into the gear and let it set for
> maybe 30 minutes (CA takes a while to completely cure).  This way you
> don't run the risk of getting CA in the bearing and the CA probably
> does not have time to run out the other end of the pinion.

> Some people have been using epoxy instead of CA and report that it
> holds better and has far less tendency to run into places where it is
> not wanted.  I stick to CA but I am using some stuff that I found in
> the car shop that is used for CAing car tires to the rims.  It seems
> to work well but I can't say for sure if it is any better than regular
> thick CA.

> Paul Goelz
> pgoelz at eaglequest dot com
> Videoastronomy, music and model helicopter website:
> http://www.eaglequest.com/~pgoelz

 
 
 

Piccolo gears, which to use?

Post by Paul Goe » Sat, 01 Sep 2001 08:41:03


On Thu, 30 Aug 2001 22:10:48 +0100, "Chris Tricker"

Quote:

>Hiya Paul :)

>Well I have the bog standard Battery pack, plus two 9.6v 700mah Twincell
>Nimh AAA Packs too.

Both should be good choices.  What will you be charging them with?
The NiCds are not terribly fussy and can be charged up to 1A.  The
NiMh are a bit more fragile and should not be charged at more than
about 700 mA.  Your charger should be specifically designed for NiMh
if you are going to use it on NiMh cells, since the peak on a NiMh
cell is more subtle and a regular NiCd charger can miss it with
disasterous consequences.  

Quote:
>I am also fitting the upgrade kit for out door flying at some point, as I
>have the kit, would you recommend starting the Upgraded engine off on the
>build NOW or wait until later??

I frankly didn't notice much difference between the stock 295 and the
"tuning" 310 motor.  I'd build it with the stock motor and save the
310 for later.  The gears are available separately (you should have
some spares anyway) and you can fit one to the 295 and 310 (see below)
and use either.  It is simple to switch motors.  Break them in first,
though.  It is important.  

Quote:
>If you now know what im about to do, does this change your opinion of what
>gears to use?

Not really.  I found the 9 tooth to be ideal for the 295 motor on 7 or
8 cells.  Note that if you run 8 cells, the tail motor will not last
as long.  And also you should know that replacement tail motors are
available from Hobby People (see my web site under Links and
Resources) for about $9 for a two pack.  They are the same as used on
the Wattage B2 bomber.  

Good luck, and do check in on the Ikarus Piccolo BBS.  There are lots
of VERY supportive folks there.  It's a rather unique community with
the best signal to noise ratio I have ever seen.  

Feel free to Email me with any questions, too.  And be careful.
Flying the Piccolo can be HIGHLY ***ive when you get the hang of
it.  

Regards,
Paul

Paul Goelz
pgoelz at eaglequest dot com
Videoastronomy, music and model helicopter website:
http://www.FoundCollection.com/~pgoelz