REFLECTOR: Top NACA Inlets

[lawrence epstein]

Ken-

Doug is the one who told me to go ahead and install the scoops (I spoke to him about a week ago). He is in the process of installing the 3rd DH on a Velocity (also an inverted engine).  He is using the stock NACA's on top, but the aft lip is elevated to increase the inlet area. In addition, there will be a 3rd NACA midline on the bottom (for the intercooler).

Thanks
Larry


From: KMis178813 at aol.com
Date: Sat, 19 Apr 2008 19:57:10 -0400
To: reflector at tvbf.org
Subject: Re: REFLECTOR: Top NACA Inlets








Larry
   I installed the only other Deltahawk on a Velocity, other than 
themselves (as far as I know). From my experience, there is no way that the 
stock top NACA scoops will give adequate airflow to keep the coolant, or 
oil coolers, cool. I also don't believe that it will be enough to keep the inter 
cooler sufficiently cool. We had a hard time doing this as I wanted low cooling 
drag and Deltahawk wanted a lot of cooling. I went with my theory to make it low 
drag. I eventually (after some engine damage from heat) moved to Doug's way of 
thinking and kept it cool. If you are going to go with the stock NACA 
scoops, have a Plan B for changing them in the future. They use a lot of 
air!!!!
 
Just my .02 cents.
 
Ken
 
 

In a message dated 4/19/2008 12:13:48 P.M. Eastern Daylight Time, 
ljepstein at hotmail.com writes:

  I am about to put in the NACA inlets on the top. 
  (I have an older "SE" fuselage). I am doing this by cutting out the shape, 
  except the forward edge, then flexing the cut out down and glassing the sides. 
  Scott sent me a template for the shape, but did not specify the depth of the 
  inlet at the aft end.

Could someone give me the depth (measured from 
  the outer fuselage skin to the "outside" skin or the "floor") of the inlet at 
  the firewall?  

This is for a Standard fuselage with a Lycoming 
  (actually, it is for the inverted Deltahawk, but will be using the same 
  inlets)..

Thanks

Larry Epstein
173 FGE




  
  > Date: Tue, 1 Apr 2008 17:11:59 -0700
> From: 
  doug.holub at tx.rr.com
> To: reflector at tvbf.org
> Subject: Re: 
  REFLECTOR: antenna mounting
> 
> I installed that same ELT a 
  couple of weeks ago. I made a copper foil dipole with each leg the length of 
  the external antenna. Picture attached.
> 
> ---- Lou Stedman 
  <stedmanlou at adelphia.net> wrote: 
> > I purchased a Ameri-King 
  AK-450 ELT from ACS to replace my old ELT. Now I need to mount an external 
  antenna. According to the instructions a fiberglass aircraft needs a 
  supplemental ground plane with a minimum diameter of 36". That is huge. I 
  called the manufacturer and was told that 36" was overkill. They say 18" will 
  do. Have any of you guys installed this unit? If so where did you install the 
  unit and antenna and how? Thanks for your input.
> > 
> > 
  Lou Stedman
> > Velocity N7044Q
> > Olean, 
  NY
=

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