Subject: Rotamax powered Sadler Vampire crashes.
From: Rotary Engine
Date: 10/5/2008, 10:57 AM
To: AAA Put this in the To box



     "NTSB Identification: CHI08LA274
     14 CFR Part 91: General Aviation
     Accident occurred Wednesday, September 03, 2008 in Findlay, OH
     Aircraft: Sadler Vampire, registration: N333SV
     Injuries: 1 Minor.

     This is preliminary information, subject to change, and may contain
     errors. Any
     errors in this report will be corrected when the final report has
     been completed.

     On September 3, 2008, at 1257 eastern daylight time, a Sadler
     Vampire, N333SV,
     received substantial damage on impact with terrain during a forced
     landing. The
     airplane experienced a total loss of engine power after takeoff from
     Findlay
     Airport, Findlay, Ohio. Visual meteorological conditions prevailed
     at the time
     of the accident. The 14 CFR Part 91 test flight was not operating on
     a flight
     plan. The pilot sustained minor injuries. The local flight was
     originating at
     the time of the accident."

     Paul Lamar


A picture from Lakeland [Sun n Fun 2008] is available at:
http://futurshox.net/aeroview.php?level=image&id=6602


Lynn E. Hanover

I took some too. Here they are. Ostensible Bill Sadler flew it at Sun n Fun
with no problems. I don't think Bill Sadler would have told me
if there were problems :)

Also this report:
https://www.aero-news.net/EmailArticle.cfm?ContentBlockID=2c83f283-80f8-40e4-9cc4-54c13af7eaaa


They mentioned a cooling problem. I had a long discussion with Eric just before
OSH at his place in Ohio about the cooling. They were attempting to pressurize
the cowling to force the air through the rad but that never works. Too many
leaks. I suggested dedicated ducts and scoops. I don't know if he implemented
my suggestions and if so how well they were constructed.

Too bad it burned. We will probably never know what happened.

Paul Lamar

Here are some pictures I took in Ohio before OSH.
The rad looks plenty big enough to do the job but the arm pit scoops
merely pressurize the cowl. When you have a cowl that large
the forces on the large panels add up to a lot of force
that tends to separate the seams causing massive air leaks
reducing the flow through the rad. In fact you can see holes in
the cowl where the muffler went through by looking in the arm
pit scoop. It was nearly impossible to directly connect the arm
pit scoops with the rad with out cutting through the main spar.

I suggested dedicated  boundary layer bleed RAM air scoops like
the ones on the Adam A500 huff and puff with ducts directly to the
rad. I don't think Eric implemented this before the ill fated flight.


Paul Lamar

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