It has taken us 20 years to begin to get a good start
on this dream. Hopefully this newsletter is accelerating the
process. I found this among some papers somebody
sent me awhile back on Dave Garber huff and puff.

Paul Lamar

I still think this is a copy of the German WWII "Anteater" design! Check
that fighter bomber out. Faster piston powered german plane of wwII. To bad
it had bmw engines.

Marc Wiese

Marc is, I believe, referring to the Dornier Do-335 "Pfeil" (Arrow).
Produced in very few numbers, perhaps a dozen or two.  Engines were
Daimler-Benz DB603 inverted V12s (similar to Bf109 engines)  in
most versions and a few were built with the Junker Jumo 213 engines.
A VERY interesting design, used a ring cowled radiator for the front engine
(looked like a radial aircooled cowl) and a P51 inlet with Paul Lamar's
recommended location for the outlet (under the horiz stab) with exit cowl
flaps.  I believe that the ring-cowled radiator would be very low drag
due to the external diffusion occuring naturally.  The aircooled radial is
widely thought to have a high drag cowl, esp without a big spinner, when
actually the spinner does nothing due to the natural diffusion occurring
at the front of the airframe, and the drag is relatively little more than
the drag of the plain airframe.

Tricycle gear, ejection seat with a jetisonable vert fin and rear prop,
very advanced in many ways, but probably too high a wing loading for
a day fighter.  Weighed 18K lbs.  They made a night fighter version with
a backseat canopy.

To verify that just adding HP does not get a lot more speed, the Do335
could do 350 mph on one engine and 425 with two.

Max of  425 mph @ 26K ft with full military equipment.  Too late (good!)
and not many built, as the US bombed the factory into rubble. One survives
in the Smithsonian.  It was sent to Dornier in the 80s and they restored
it to mint condition.  Unfortunately I have seen it as it sits disassembled
 forlornly in a warehouse in Silver Hill cocooned in plastic wrap because
they don't have the space.  I hope it makes display at the new Dulles
facility.

A couple of pix show the interesting and innovative water cooling
solutions.  Anybody up for doing the ring cowl on a RV6?  I'll bet
it is pretty low drag and has a very high pressure on the front of
the radiator for great cooling!  It would sure look different, too.

Bill Freeman

Long EZ builder & pilot
BSME, MSME
EAA Technical Counselor

 
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