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Greg,
So you should get a cruise of about 225 Knots at 6K. That is right in the
ballpark for the Legacys. I flew with Kevin Roberts a couple of weeks ago
and he was cruising at 222 knots. There is another Legacy at Deland, Fl
that I heard was getting about 240.
I am really curious about the takeoff and climb performance you will get.
I am concerned about my prop with only 88" of pitch. You have an extra
blade to help there though.
I never heard what diameter and pitch Tracy has on his Catto prop for the
20B. He should be able to cruise that RV-8 close to Vne!
I am hoping for 200 mph with my fixed gear and Renesis. If it ever gets
itself finished. (I need to move next door to Rusty!)
Bill B
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Greg Ward
Sent: Sunday, June 08, 2008 9:33 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Muffler failed designs.
Hey Bill;
It's a 76" prop, 130" pitch. Target rpm 310 mph@2456 rpm. Now you know why
I need a turbo. Lead time varies.
Greg
----- Original Message -----
From: "Bill Bradburry" <bbradburry@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, June 08, 2008 3:07 PM
Subject: [FlyRotary] Re: Muffler failed designs.
> That is a LOT of pitch! What are the dimensions of that prop? How long
> was
> the lead time?
>
> Bill B
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of Greg Ward
> Sent: Sunday, June 08, 2008 5:09 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Muffler failed designs.
>
> Shortly Bill, just got my prop from Craig Cato today, and want to hang it,
> then take a bunch of pics. Enclosed is a little teaser from this morning.
> Greg
>
> ----- Original Message -----
> From: "Bill Bradburry" <bbradburry@bellsouth.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Sunday, June 08, 2008 7:36 AM
> Subject: [FlyRotary] Re: Muffler failed designs.
>
>
>> Greg,
>> Do you have any pictures anywhere of your install?
>>
>> Bill B
>>
>> -----Original Message-----
>> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
>> Behalf Of Greg Ward
>> Sent: Saturday, June 07, 2008 10:25 PM
>> To: Rotary motors in aircraft
>> Subject: [FlyRotary] Re: Muffler failed designs.
>>
>> A little off of the subject, but close. Just got my engine and turbo
>> mounted on the Lancair, and was wondering if anyone had ever exited the
>> 3"
>> downpipe right out of the side of the cowling, ala turbine exhaust types,
>> (thrust???) it would eliminate 2 bends, and about 3' of pipe, and with
>> the
>> turbo, it should be relatively quiet. Any thoughts?
>> Greg Ward;
>> Lancair Legacy RG 20B getting closer to startup.......
>>
>> ----- Original Message -----
>> From: <neilak@sympatico.ca>
>> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>> Sent: Saturday, June 07, 2008 4:08 PM
>> Subject: [FlyRotary] Muffler failed designs.
>>
>>
>>> Al,
>>>
>>> If you go through the archives, you'll find lots of examples of
>>> failed muffler designs. Many by your's truly. I think I've tried every
>>> concoction known to man and the Swiss. They all worked... for a while.
>>>
>>> Actually, the many variations of the Swiss muffler I tried had the
>>> best exhaust note by far. None lasted more than an hour, some less than
>>> a
>>> few minutes. Heat wasn't so much the problem since I had found many
>>> materials good to 2200F but none could stand the pounding.
>>> http://www.piteraq.dk/flight/muffler.html
>>>
>>> My best overall design (see attached) is a 2" tube, full of holes
>>> inside a 5" tube. All made of 16ga SS, all welded together. Needless
>>> to
>>> say, the flange is more like 3/16" - 1/4" SS. The inside end of the 2"
>>> tube
>>> is welded to the end cap of the 5" tube. That blocks off the one end of
>>> the
>>> 2" tube and secures it from movement. The exhaust end of the 2" tube is
>>> welded through a 2" hole in the other 5" end cap. Rather than drilling
>>> the
>>> 2" tube full of round holes, we cut slots with a saw. Then take a big
>>> flat
>>> blade screwdriver, stick it in the slot and bend it over. This creates
>>> an
>>> oblong hole. (Much easier than drilling into SS. This is what will go
>>> on
>>> the Volmer.
>>>
>>> The sound is quite acceptable, it fits inside the cowl and Jim M.'s
>>> version lasted the life of the aircraft... 600+ hours.
>>>
>>> Neil
>>>
>>> PS: Are you considering Rough River?
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
>>> Behalf Of Al Wick
>>> Sent: Saturday, June 07, 2008 4:57 PM
>>> To: Rotary motors in aircraft
>>> Subject: [FlyRotary] Re: Mistral Crash Analysis
>>>
>>> C'mon guys. You do this every time there's a crash. Instantly go into
>>> rationalization mode. It's unhealthy. Greatly increases risk builders
>>> won't
>>> take action. Increases risk you won't research it thoroughly.
>>>
>>> A healthy response would be:" Here's another example of how our engines
>>> produce unusually destructive exhaust temperature and pulses. We have a
>>> rich
>>>
>>> history of broken exhaust components. We need to be very thorough when
>>> designing and building exhaust."
>>>
>>> I designed my own muffler. It had two inlets, two outlets. So if (when)
>>> my
>>> muffler failed, it could never block both pipes. I also put loose safety
>>> wire around my pipes, because on a pusher loosing pipe wipes out prop.
>>> So
>>> basically, I assume stuff will fail, then design it to control the way
>>> it
>>> fails. I've heard of rotary guys doing same type of thing. This is a
>>> good
>>> time to share those key items.
>>>
>>> On your car, they deliberately design products to fail a certain way.
>>> They
>>> will make a component weak, so it fails first. They do that with wheels
>>> and
>>> hubs. So when the muffler fails, little pieces come apart, not big
>>> sections?
>>>
>>> You guys do a great job of sharing successes, design and construction
>>> details. This is another opportunity.
>>>
>>> -al wick
>>>
>>>
>>>
>>>
>>> <No doubt you are on the money, Rusty. When folks are already
>>> predisposed
>>> to bad mouth the rotary - this will only be more ammunition. "See! even
>>> with umpteen million dollars you can't get one to fly" {:>). But, I
>>> serious doubt it will effect many who have researched the rotary and
>>> come
>>> to
>>>
>>> understand its benefits - as for the rest, who cares {:>)
>>>>
>>>
>>> I'm certain it was a relief to Mistral that the culprit was not one of
>>> their engine components.
>>>
>>>
>>>
>>> Whew! a close one for sure.
>>>
>>>
>>>
>>> Hi Ed,
>>>
>>>
>>>
>>> Unfortunately, I bet the majority of people will only hear "Mistral
>>> rotary", "lost power", and "crash" :-(
>>>
>>>
>>>
>>> Rusty (RV-3 taking forever.)
>>>
>>> ____________________________________________________________
>>> Orlando Vacations - Click Here!
>>>
>>
>
http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3nK7u59LkagfZ5IcEgGqYcvPRC
>>> wA85GgQITbFK9vE7wPGKFP/
>>>
>>> --
>>> Homepage: http://www.flyrotary.com/
>>> Archive and UnSub:
>>> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>>>
>>
>>
>>
>
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>> ----
>>
>>
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>>
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>
>
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