REFLECTOR: DH engine vs. Velocity Beauty

[Steven Oakley]

I am also interested in a DH engine, it does occur to me that the model of
velocity they are using for testing has no NACA scoops on the top and was
possibly an older velocity that had a different Engine airflow system. I am
hoping that with the proposed "velocity produced firewall kit" that a way of
using the NACA scoops on the top of the fuselage would be found that would
give sufficient cooling, also that engine alternatives will be available to
reduce the need for cowl mods.

Anyhow I hope they have thought about this, bat as an alternative I could go
for the superior XP360 or the IO-390X or even something else, who knows what
will hit the streets in the next 3 or so years.

Steve.  

-----Original Message-----
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Keith Hallsten
Sent: Sunday, February 12, 2006 9:49 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: RE: REFLECTOR: DH engine vs. Velocity Beauty

The DeltaHawk "A"-series or "inverted V" will fit in the standard cowl
designed for an IO-360.  That will take care of the top cowl modification.
However, it is not yet available.  In all likelihood, this will be an option
by the time you need an engine.

The consideration of the cooling scoops is a tougher problem.  It's in the
very nature of compression-ignition engines that they run hotter and have
more significant cooling requirements.  See, for example, the air intake for
the C-182 STC installation of the SMA SR305-230 turbo-diesel.  It's HUGE.
>From what I know, you will need a big scoop to keep a diesel happy.  
>(The
original SMA was liquidated last year after losing $millions$ trying to
solve the technical and marketing problems of putting their turbo-diesel
into planes.  The engine is coming back to market under SAFRAN Group, see
www.smaengines.com.  So far, it looks like DeltaHawk is having better luck!)

Keith Hallsten