Hi Mike,
Per ATC 787, p. 8, item 106. "in accordance with Note 4" which, on p.
11, (b) requires the oil tank baffles when McCauley or Sensenich metal
props or the Beech controllable pitch prop is installed on a 415-D with
the C-75 to C-85 engine "upgrade".
While it is true in a practical sense that anything one can get
installed and approved with a 337 must be OK without a 337, the
difference is one of prudence and legality. You can operate 10%
overgross in Alaska, but don't try to do it in the lower U.S.!
The "FAA/PMA approval" for the skull cap as part of the prop, as
opposed to part of the airframe, is interesting. Some Ercoupes have
the CF McCauley (elliptical tip) prop which is apparently not approved
;<)
Regards,
William R. Bayne
.____|-(o)-|____.
(Copyright 2009)
--
On Aug 30, 2009, at 14:31, mbpowell wrote:
I thought the oil tank baffle was called for when a variable pitch
prop was installed.
I'm still looking for my Coupe book with no luck. I did find "Stick
and Rudder" and did some review. Reading or rereading "Stick and
Rudder" is way more important in my eyes than worring about the
cooling loss with a skull cap spinner. If you can get it installed and
approved with a 337 it must be ok with out a 337. It is approved for
certain props. FAA/PMA'd. Skull Cap for Small Size Spinner. Diameter
5-1/4". Sensenich 74CK-0, 74CK-2, 76AM6-2, 76CK, 72CK, 76AK-2, 74FKT,
74FK; McCauley CM74, CM73, CM71, CM70, LM72. Code 4
Mike @ KDLL
--- In [email protected], Glenn Putnam <putp...@...> wrote:
No one clalms you will have cooling problems but it will cool
slightly better with the correct spinner .Your plane came with a
skull cap because someone was to cheap to buy the correct one
Speaking of cooling I have seen many 85hp without the baffles on the
oil tank they still cool within limits.glenn
On Aug 26, 2009, at 5:03 PM, Bob Swinney wrote:
I have one that came on the plane when I purchased it 5 years
ago....No cooling problems at all; in Florida....
Bob
--- On Wed, 8/26/09, Glenn Putnam <putp...@...> wrote:
From: Glenn Putnam <putp...@...>
Subject: Re: [ercoupe-tech] Skull cap spinner
To: "Glen Davis" <g...@...>
Cc: [email protected]
Date: Wednesday, August 26, 2009, 4:51 PM
No! it does not give proper air flo for cooling Glenn Putnam
On Aug 26, 2009, at 1:01 PM, Glen Davis wrote:
Does anyone know if the Skull Cap spinner is legal for use on an
Ercoupe with a metal prop?
Thanks
Glen
Glen Davis
917 297 1111
www.ishootpictures. com
