Steve have you got any pictures of the installed duct?  That might help us
to get a better 'picture' [pardon the pun] and be better able to offer some
help.

Jarrett Johnson

----- Original Message -----
From: "Steve Brooks" <steve@tsisp.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, July 16, 2004 12:24 PM
Subject: [FlyRotary] 11th test flight


> I made a test flight today with the new scoop, but also wit cooler OAT
(70F)
> than I've seen in the last couple weeks.  I flew for 6 tenths of an hour
> with temperatures for the oil at 207 and coolant 200 stabilized at 4700
> RPMs.  I increased the throttle to 5300 RPMs and the coolant stayed put,
and
> the oil increased by only 3 degrees.  I was about 1500 AGL for the entire
> flight. I did descend a few hundred feet and climb a few hundred feet to
> watch the temperatures, but usually was flying a level circle around the
> airport.  I reduced the throttle to 4300, and maintained level flight at
> about 105 kts.  Oil dropped to 195 and coolant to 190.
>
> I guess that the good news is the I could fly all day at those
temperatures,
> and I never saw any temperatures higher than 210, though I really didn't
do
> an extended climb.  I really didn't push level cruise higher than 5300
(135
> kts), but the temperatures seemed to be holding, and actually the oil
> dropped a degree after letting it stabilize a couple of minutes.
>
> The bad news is that the scoop appears to be costing me about 10 kts,
which
> I was expecting.  I also don't have any wheel pants yet on the main gear,
so
> it's not like I'm out to win any speed test at this point anyways.  My oil
> continues to run higher than the coolant which indicates to me that I need
> to do some more baffling to divert more air to the oil cooler.
>
> I also have not done any filling or finishing to the scoop, so it's
surface
> is more like sandpaper right now.  Finishing it will probably improve air
> flow some more, and also reduce some of the drag.   I left the scoop on
the
> plane for now, so that I can hopefully get another flight in tomorrow
> morning.  My plan tomorrow is to climb up to 5000' and see what I get
there.
> Then I'll remove the scoop, which takes about 5 minutes, and bring it home
> for some filling and sanding.  And after a few more flights, and more
> filling and sanding, some primer and paint.
>
> I am still looking at this as a "hot weather scoop".  My plan is to remove
> it during cool weather, and re-install it for June-August.  I mount the
> scoop using 6 10-32 SS screws into nutplates embedded in the landing gear
> cover, plus 2 of the screws that mount the landing gear cover to the
> fuselage.  It's not likely to come off on its own.
>
> Steve Brooks
> Cozy MKIV
> Turbo Rotary - 6.3 hours and counting
>
>
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>