Webra Bragging

[Brian Young]

I used a 1/8 ply firewall in my recent plane. Havent
noticed any problems, engine is a Webra 1.45. 

--- GW <gw at gwair.com> wrote:
> Great info Matt.  Thanks!
> 
> I have often thought about using a 1/8" firewall for
> weight saving purpose, but most kits call for a
> 1/4".
> I say I am going to try it each time, but back out
> at the last minute. 
> Might do the 1/8" on the next fiberglass kit with a
> homemade Hyde-like  mount I have made from the info
> on Bobs site as well.
> 
> I have always thought the pipes were  louder than
> mufflers, you seem to prove otherwise, at least
> according to Mike and Emory regarding the
> "Stealthness" of your plane.    Gotta love that word
> Stealth.  I plan on using either the Bolly 480 or
> ES140XL pipe.   I have not commited ,yet, to either
> one.
> Later,
> GW
> Gerald Williams
> Webpage :  www.gwair.com
> Email: gw at gwair.com
> 
> 
>   ----- Original Message ----- 
>   From: Rcmaster199 at aol.com 
>   To: discussion at nsrca.org 
>   Sent: Thursday, September 19, 2002 7:46 PM
>   Subject: Re: Webra Bragging
> 
> 
>   Gerald,
> 
>   My set-up is straight forward as follows:
> 
>   Webra 145R, black head, with the standard Macs
> header. Both purchased from Piedmont (Lee Davis)
> 
>   OS/Hatori tuned pipe for the OS 140 RX or EFI. 23
> 1/4" from the exhaust flange to the first baffle,
> straight line
> 
>   My own soft mount I described in the March K
> Factor. It is based on the HYDE mount, is all wood
> including the beams. Bob Pastorello has some of the
> drawings on his web site. I followed his drawings
> for the absorber portion. Mine differs in that the
> beams are glued to the front plate and a box is
> built around the case with balsa and lite-ply. A
> standard HYDE soft mount is a must if you don't make
> your own.
> 
>   I use a ply wood nose ring of my own design but
> any standard nose ring will do the job, as long as
> it fits
> 
>   Model is a ZN-Line kit, Alliance. Their
> construction technique includes foam sheeting on the
> Kevlar for stiffness and sound suppression. This
> simple technique is extremely effective. You will
> find that Lance VanNostrand's and Grey Fowler's
> (AeroSlave) offerings have a similar construction.
> Also, take a look at the new Temptation offered by
> Piedmont; Lee Davis describes a similar sandwich in
> the shell of their fuselages
> 
>   My firewall is 1/8: aircraft ply for the front
> face plus a 1/8" lite ply "U" shaped crutch behind
> the firewall, extending about 4" toward the canopy.
> It keeps the fuselage from drumming in this area
> just behind the engine.
> 
>   Fuel I use is a special blend of Cool Power heli
> and standard fuel, to 15% nitro and 19% thinner oil.
> I have the details on Ed Hartley's RCPattern page
> 
>   Props are: take your pick, the stealthiest is a
> 15.5x12 apc 4 blade. The model is practically
> inaudible and a little spooky to fly because it's
> too quiet. The rest are about the same 17x12, 16x14
> std and N, 16.5x13 std, all apc's. The 16.5x13 was
> used nearly exclusively during early running. The
> engine turns anywhere from 7500 to 8000 r's
> depending on the prop. It will run faster but does
> not have to. Power to burn on the 45 deg up 1 1/2
> snap or the figure 9 with 3/2 rolls.
> 
>   Should you decide on a similar set-up, please
> contribute your findings to Ed Hartley's page
> 
>   Matt Kebabjian
> 
> 
> 
> 
>   In a message dated 9/19/2002 7:36:02 AM Eastern
> Daylight Time, emorydmd at earthlink.net writes:
> 
> 
> 
>     Subj:Re: Webra Bragging 
>     Date:9/19/2002 7:36:02 AM Eastern Daylight Time
>     From:emorydmd at earthlink.net
>     Reply-to:discussion at nsrca.org
>     To:discussion at nsrca.org
>     Sent from the Internet 
> 
> 
> 
>     Gerald,
> 
>     Matt's set-up is probably the most quiet I have
> ever heard. It makes almost no noise when it's
> flying. I had a chance to fly his Alliance and the
> Webra is a very strong engine. If my Tigers ever
> fail me, I think that would be a good choice.
> 
>     Emory.
> 
> 
>       ----- Original Message ----- 
>       From: GW 
>       To: discussion at nsrca.org 
>       Sent: Wednesday, September 18, 2002 9:32 PM
>       Subject: Re: Webra Bragging
> 
> 
>       Mike,
> 
>       I have very little personal experience with
> big 2S engines, but I witnessed yours and Emory
> Schroters <sp> 2S equipped planes this weekend at
> Huntsville , and was truly impressed with the lack
> of "noise" these planes made. Truly amazing.
> 
>       I believe it is a combination of many things
> that it took to make these 2 planes this quiet, not
> just a good muffler, or just a soft mount, or any
> one thing. A combo of all is what seems to be the
> ticket. Hope to accomplish this myself with my new
> T2K soon as well.
> 
>       If Matt's is quieter than yours and Emory's,
> then it must truly be a extremely quiet setup. 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 


=====
Brian Young
Tulsa
b4598070 at yahoo.com
918-745-6046h
918-838-0900w

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