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Feb 28, 2003, 12:22 PM
Thomas Nilsen
Thomas Nilsen
Guest

OS FX46-H Carb mod?


Does anyone know if OS ever fixed the problem with the 46FX-H carburator? If
I bought a replacement throttle body today, would I still have to drill the
1mm hole in the carb to get it to throttle properly on idle/midrange?

Regards, Thomas


Mar 04, 2003, 05:32 PM
Carl Farrington
Carl Farrington
Guest

Re: OS FX46-H Carb mod?


"Thomas Nilsen" <thomas.nilsen@doc-s.co.uk> wrote in message
news:3e5f91aa$1@news.broadpark.no...
> Does anyone know if OS ever fixed the problem with the 46FX-H carburator?

If
> I bought a replacement throttle body today, would I still have to drill

the
> 1mm hole in the carb to get it to throttle properly on idle/midrange?
>



the hole-drilling is just a modification you can do to any 2-needle carb to
help out in the mid range. OS introduced 3-needle carbs making this mod a
waste of time. Surely with careful stetup, you could get a regular-ish
running engine without having to drill the hole.

erm.. thats all I can say, 'cause that's what I read somewhere. Someone on
here must be using the engine you mentioned though.

good luck

> Regards, Thomas
>
>



Mar 05, 2003, 10:22 AM
Thomas Nilsen
Thomas Nilsen
Guest

Re: OS FX46-H Carb mod?


Well, apparently there is a well know issue with the first version of th 46
FX-H carb. As I don't have a very good workshop to do the modification
myself, I thought it would be easier to just go out and by a new and proven
carb-house... but I'm a bit uncertain about it all as i've not been able to
find any good info on this...

I would have thoght that this would be a much used engine amongst the
enthusiast on this forum... but maybe not?

Regards,
Thomas

"Carl Farrington" <carl@000compsup000.net> wrote in message
news:b438pp$s6q$1$8302bc10@news.demon.co.uk...

>
> the hole-drilling is just a modification you can do to any 2-needle carb

to
> help out in the mid range. OS introduced 3-needle carbs making this mod a
> waste of time. Surely with careful stetup, you could get a regular-ish
> running engine without having to drill the hole.
>
> erm.. thats all I can say, 'cause that's what I read somewhere. Someone on
> here must be using the engine you mentioned though.
>
> good luck
>
> > Regards, Thomas
> >
> >

>
>



Mar 06, 2003, 07:12 AM
Beav
Beav
Guest

Re: OS FX46-H Carb mod?



"Thomas Nilsen" <thomas.nilsen@roxar.com> wrote in message
news:3e661367@news.wineasy.se...
> Well, apparently there is a well know issue with the first version of th

46
> FX-H carb. As I don't have a very good workshop to do the modification
> myself, I thought it would be easier to just go out and by a new and

proven
> carb-house... but I'm a bit uncertain about it all as i've not been able

to
> find any good info on this...
>
> I would have thoght that this would be a much used engine amongst the
> enthusiast on this forum... but maybe not?


The 46 sized motor's were never as popular as the 30-32 sized and when the
push came to drive us into the slightly bigger versions, the push went all
the way to 50 sized. OS, Webra, Rossi and others all now make a 50 engine so
the 46 was left behind.

Having said that, for SOME heli's the OS 46 is perfect and I've had more
than a few over the years, during which I never found the need to modify the
standard carb. This isn't a case of me getting good examples either, because
I've never seen anyone else drill the carb in all the years I've been
involved in the hobby, and some of my pals are still using the OS 46 as it
came out of the box.

If you're not having engine problems, then the carb mod is just another
"thing" to do with no real benefit.


--
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


Mar 06, 2003, 08:02 AM
MPA
MPA
Guest

Re: OS FX46-H Carb mod?


On Thu, 6 Mar 2003 11:18:40 -0000, "Beav"
<beavis.original@ntloxoworld.com> wrote:

>
>"Thomas Nilsen" <thomas.nilsen@roxar.com> wrote in message
>news:3e661367@news.wineasy.se...
>> Well, apparently there is a well know issue with the first version of th

>46
>> FX-H carb. As I don't have a very good workshop to do the modification
>> myself, I thought it would be easier to just go out and by a new and

>proven
>> carb-house... but I'm a bit uncertain about it all as i've not been able

>to
>> find any good info on this...
>>
>> I would have thoght that this would be a much used engine amongst the
>> enthusiast on this forum... but maybe not?

>
>The 46 sized motor's were never as popular as the 30-32 sized and when the
>push came to drive us into the slightly bigger versions, the push went all
>the way to 50 sized. OS, Webra, Rossi and others all now make a 50 engine so
>the 46 was left behind.
>
>Having said that, for SOME heli's the OS 46 is perfect and I've had more
>than a few over the years, during which I never found the need to modify the
>standard carb. This isn't a case of me getting good examples either, because
>I've never seen anyone else drill the carb in all the years I've been
>involved in the hobby, and some of my pals are still using the OS 46 as it
>came out of the box.
>
>If you're not having engine problems, then the carb mod is just another
>"thing" to do with no real benefit.


I still have mine and the only thing I noted (read the blurb about the
carb mod) was with the right mixtures it's a bit of a dog spooling up
sometimes but thats all, it doesnt seem to matter in the air and the
gov is throttling on and off all the way so I figured its a low rpm
thing and forgot about it.
The mod seemed to indicate it was a low speed issue.

Mar 06, 2003, 11:53 AM
Beav
Beav
Guest

Re: OS FX46-H Carb mod?


>
> I still have mine and the only thing I noted (read the blurb about the
> carb mod) was with the right mixtures it's a bit of a dog spooling up
> sometimes but thats all, it doesnt seem to matter in the air and the
> gov is throttling on and off all the way so I figured its a low rpm
> thing and forgot about it.
> The mod seemed to indicate it was a low speed issue.
>


It was supposed to address the mid range richness IIRC, but once the motor's
are warmed up, there was no problems with any of mine (or any I'vve flown
that WEREN'T mine)

Maybe some fuel combinations showed the problem up more than "our" usual
brew, but whatever the reason for the problem, like I say, it was never one
I've experienced.


--
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


Mar 08, 2003, 03:03 PM
S. Kruit
S. Kruit
Guest

Re: OS FX46-H Carb mod?


"Beav" <beavis.original@ntloxoworld.com> writes:

> >
> > I still have mine and the only thing I noted (read the blurb about the
> > carb mod) was with the right mixtures it's a bit of a dog spooling up
> > sometimes but thats all, it doesnt seem to matter in the air and the
> > gov is throttling on and off all the way so I figured its a low rpm
> > thing and forgot about it.
> > The mod seemed to indicate it was a low speed issue.
> >

>
> It was supposed to address the mid range richness IIRC, but once the motor's
> are warmed up, there was no problems with any of mine (or any I'vve flown
> that WEREN'T mine)
>
> Maybe some fuel combinations showed the problem up more than "our" usual
> brew, but whatever the reason for the problem, like I say, it was never one
> I've experienced.
>
>
> --
> Beav


I'm currently trying to setup my first heli with OS 46 and am having trouble ;(

What kind of fuel do you use. I'm using Coolpower with 15% nitro.

Bas ( Trying to fly a Moskito Sport)
Mar 08, 2003, 07:32 PM
Beav
Beav
Guest

Re: OS FX46-H Carb mod?


)> >
> > --
> > Beav

>
> I'm currently trying to setup my first heli with OS 46 and am having

trouble ;(
>
> What kind of fuel do you use. I'm using Coolpower with 15% nitro.


I use a simple "brew" consisting of 18% EDL oil from Model Technics, plus
any amount of nitro I think the engine will run on (usually 10-15% for the
OS46 one a tuned pipe). Obviously the rest is made up of methanol

Nothing fancy or special at all.


>
> Bas ( Trying to fly a Moskito Sport)


Should be fine in your Mozzie, it certainly is in Howards (one of the guys
I'm currently helping along)


--
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




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