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Congratulations, Hank!
Must have got your attention when the rudder trim kicked in. Your temps
are not surprising, it seems that at least 90% of all rotary powered first
flights have an over temp oil and/or coolant. Even with our sharing of what
works, the devil appears to remain in the details of how its implemented.
My experience indicates that generally there is a problem with either the
oil or coolant cooling system that needs tweaking, its seldom that both have
problems. Once the heat goes up in one, the additional heat bleeds over
into the other system.
I had both oil and coolant overtemps on my first flight. When I finally
solved the oil over temp the coolant temps fell right into place. Here is a
photo of what the front of my rotary powered aircraft looks like - looks
like a flying fin factory.. All ducts are fiberglass from entry point to
radiator surface with no holes at all and no sealing required (except I do
where the duct touches the outer perimeter of the fin area with foam rubber
strips.
My nominal temps for coolant and oil are now 170-190F at cruise depending on
OAT. With OAT of 95+ I will see 210F on both oil and coolant during take off
which settles to 200F on initial climbout and to the cruise figures once
power is reduced.
Lets see some photos of your rotary bird/
Best Regards
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
eanderson@carolina.rr.com
----- Original Message -----
From: <Bahahud@aol.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, August 01, 2003 7:30 PM
Subject: [FlyRotary] First flight - another Rotary
> Today, 08/01/03 I completed the first flight in my rotary powered Lancair
235
> from Half Moon Bay Airpoprt in CAlifornia.
>
> The flight was uneventful with the following exceptions. These Lancair
> airplanes are REALLY twichy on the controla.
>
> 1. I found that when i pushed the transmit button on my radio the rudder
> trim went to full left deflection. Bit of a surprise there until I
figured out
> what was happening. The radio worked OK but I quit talking.
>
> 2. The coolant temperature went to 240 deg. F. / oil to 230 deg F.
>
> These temps. did not happen during taxi testing but I was unbable to keep
the
> power up for more than 30 to 45 seconds without a takeoff.
>
> 3. Minor oil leak at rear seal on the PSRU.
>
> All other items appeared nominal but due to the high temps. I cut the
flight
> short to stop and consider the problem.
>
> Hank Huddleston LNC 235 Rotary N644H
>
> >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html
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