Pipes - Plugging After Long Use - Cleaning?

[Brian Young]

Ok, I had thought of that now I know what size drill
to buy....lol
Funny how the acetone and alky run up and down the
pipe so well but exhaust wont.

--- Rick Wallace <rickwallace45 at hotmail.com> wrote:
> I had a similar problem on a Bolly 480 muffler -
> after several hundred
> flights. Acetone / alcohol soaks didn’t seem to do
> much good, so I
> finally took a long ¼ dia drill and drilled 6-8”
> straight up the center
> line through the exhaust end of the muffler. It
> seemsed to relieve the
> obstruction problem, and is still one of the
> quietest setups at the
> field. 
> 
>  
> 
> -----Original Message-----
> From: discussion-request at nsrca.org
> [mailto:discussion-request at nsrca.org]
> On Behalf Of jim ivey
> Sent: Thursday, June 19, 2003 11:23 PM
> To: discussion
> Subject: Re: Pipes - Plugging After Long Use -
> Cleaning?
> 
>  
> 
> Brian
> 
>  If I remember correctly the Carb cleaners will
> attack aluminum and
> maybe ruin the pipe.
> 
> Jim Ivey
> 
>  
> 
> ----- Original Message -----
> 
> From: Brian Young
> 
> Sent: Thursday, June 19, 2003 10:23 PM
> 
> To: discussion at nsrca.org
> 
> Subject: Pipes - Plugging After Long Use - Cleaning?
> 
>  
> 
> I think Ive heard of this before but has anyone ever
> experienced a pipe becoming plugged after prolonged
> use. This is a Bolly 590 which has been used for
> three
> seasons now. I couldnt figure out why I was down
> 500-600 rpm, 2 stroke engine is fairly freshly
> rebuilt, runs ok, just down on RRRRsss. I finally
> put
> the thing on my test stand and noticed the pipe was
> hard to blow through, swapped the pipe with another
> one and found 1000 rpm.
> 
> Now it turns 17x10N at 8500 on 25% w/ Bolly 565n
> Was at 7500 on 25% on the plugged Bolly 590.
> 
> Normally I run on 15%, but was curious whether nitro
> would pickup the rpm before I figured the pipe must
> be
> restricted.
> 
> Is it possible to clean the semi plugged pipe out?
> Ive
> been trying carb cleaner.
> 
> =====
> Brian Young
> Tulsa
> b4598070 at yahoo.com
> 918-745-6046h
> 918-838-0900w
> 
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=====
Brian Young
Tulsa
b4598070 at yahoo.com
918-745-6046h
918-838-0900w

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