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Re: 320/360 Cowl Sizes

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  • christopher_skelt
    Will, It s 2 3/8 inches measured with a gauging caliper inside the recess of the intake hole from the outside of the moulding. Regards, Chris.
    Message 1 of 4 , Jan 1, 2007
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      It's 2 3/8 inches measured with a gauging caliper inside the recess of
      the intake hole from the outside of the moulding.
      Regards, Chris.

      --- In lancair@yahoogroups.com, "holdenwaca" <holdenwaca@...> wrote:
      > Chris,
      > Thanks for taking the time to write all that. It helps. As it
      > happens, I have both engine mounts and both sets of cowls. I am going
      > with an IO-360 so I want to use the longer mount, which is on the
      > plane now. I am selling all of the "short" stuff, and I just want to
      > make sure I pair it all up right. What I meant by larger was the grey
      > cowl seems to have a deeper from part in front of the air scoop. This
      > is, I assume, what you were talking about the area needed for the
      > forward mounted injector. My part numbers are the same, too...for
      > both parts. That's what's thrown me off more than anything. If it is
      > not too much trouble, can you tell me what the inlet hole cutout size
      > is on your short set? Thanks so much!
      > Will
      > --- In lancair@yahoogroups.com, "christopher_skelt" <cskelt@> wrote:
      > >
      > > Will,
      > > By "larger" do you mean "longer?"
      > >
      > > The answer may be "it depends on your engine mount, engine and
      > > possibly prop and spinner." My 320 FB was shipped in June 1990 and
      > > came with grey cowling halves with score marks about two inches
      > > forward of the aft edges. The top half is P/N 150T serial number 1115P
      > > and the bottom is 150B serial number 2007P. They are dated November
      > > 1989. Their overall length is 36 1/2 inches.
      > >
      > > The distance from the front of the firewall to the aft side of the
      > > starter ring is 30 3/8 inches with an IO-360 M1A/B engine from
      > > Lycoming delivered a few months ago hanging on a black painted
      > > dynafocal type 1 mount that I received from Lancair in December 1994
      > > once it became clear that I wasn't going to use a conical mount
      > > engine. This is a "short mount" which I understand is about three
      > > inches shorter than the "long mount" that some newer LNC2s have. I
      > > will need to trim about half an inch off the aft edge of the cowling
      > > halves to fit to length with a Hartzell prop with the spinner from
      > > Lancair. The score marks happen to line up with the front of the
      > > joggles around the firewall, so if I were to trim to the marks there
      > would
      > > be no way to attach them to the front fuselage.
      > >
      > > These cowling halves are therefore too short by a few inches if you
      > > have the long mount.
      > >
      > > The scoop on the lower half is moulded for a bottom mounted
      > > carburettor or injector. With a forward mounted injector you need to
      > > fit a modified scoop. It's described in the manual and the scoops are
      > > available from Lancair.
      > >
      > > Hope this helps. Let me know if I can make any more measurements to
      > > clarify.
      > >
      > > Regards, Chris.
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