Webra Bragging

Thu Sep 19 16:46:18 AKDT 2002

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:<A HREF="mailto:emorydmd at earthlink.net">emorydmd at earthlink.net</A>
> Reply-to:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> To:<A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A>
> 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: <A HREF="mailto:gw at gwair.com">GW</A> 
>> To: <A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A> 
>> 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. 
>>  
>> I am assuming Matt is on the list,  Matt? What is the setup of motor, 
>> motor mount,header pipe,muffler ,fuel,prop you have found to be to your 
>> liking?
>>  
>>  
>> Later,
>> GW
>> Gerald Williams
>> Webpage :  <A HREF="http://www.gwair.com/">www.gwair.com</A>
>> Email: <A HREF="mailto:gw at gwair.com">gw at gwair.com</A>
>>  
>>  
>> 
>> >>> ----- Original Message ----- 
>>> From: <A HREF="mailto:kerlock at attbi.com">Mike Hester</A> 
>>> To: <A HREF="mailto:discussion at nsrca.org">discussion at nsrca.org</A> 
>>> Sent: Wednesday, September 18, 2002 10:15 PM
>>> Subject: Re: Webra Bragging
>>> 
>>> 
>>> Ford, Chevy, OS, Webra, YS......
>>>  
>>> If it works and you understand it and can make it perform for you, it's 
>>> your engine. If you're having a bad experience, it's probably worth 
>>> trying something else.
>>>  
>>> The OS, Webra and the new DZ are all capable engines in the right hands. 
>>> For instance I can't make an OS run bad to save my life, but the only 4 
>>> stroke I ever owned tore up 3 times in 4 weeks. So I'm a 2 stroke guy =P 
>>> Plus is it just me, or are some of the 2 strokes unbelieveably quiet? 
>>> Mine purrs, but Matt Kebabjian's is practically in stealth mode. 
>>> Technology has come a long way.
>>>  
>>> I for one am just glad we have REAL alternatives in engine selection.
>>>  
>>> -Mike Hester
>>> 
>> 
> 

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