George Lendich wrote:

 > Cruise at full throttle 9500ft temp. 10 degrees C [50 F]. 6400

rpm

leaned

past peak

rpm. 130knots on the ASI. 30 liters/hr. [8 GPH] average included

1hr

very low level

OS  temp. 40+ d. C. [104 F]  Engine temps up top 90 {194 F] oil

85

[185

F] coolant.

Near ground 90 [194F]
and 90. Climb limited to 500fpm. Rather warm in the cab during

the

low

level

bit.
Fuel economy definitely suffers with increase in outside temps.

I

get

around

26 liters/hr  [6.5 GPH] in the cooler months.
Ian. Broome Australia.

BTW Ian's PSRU is  2.85:1 Ross.

What in the devil are you doing in the middle of the outback in

the

middle of the summer?  I hope they are paying you a lot Ian :)
Paul Lamar

Ian,
I'm trying to help the 80% scale Spitfire Supermarine guys (here in

Brissie)

get a 13B install sorted out, so I have some questions please.

Full power at cruise at 6,400 rpm and PSRU ratio, gives 2245 prop

rpm,

what

size prop are you running.

       72 1/2 inch by 81 pitch.

Is your take-off at 6,400 RPM, or are you running higher rpm for

take-off.?

About 6,300 rpm.

Note that at 2000' amsl on a cool day I get 7200 to 7400 rpm around 200

MPH

ground speed.

What size oil and water radiators are you running?

Mazda oil cooler. Two evaporator cores 9" X 10" X 2 1/2" from

memory.

What engine management system are you using?

Michrotech.

Ian Beadle

Ian,
Thanks very much mate.
Any down side with Microtech for aircraft use. I've been advised it will do
the job, but never used one before?

Do you like Paul's set-up with the radiator under the motor? I'm considering
that with the flaps etc.!!

Any other advice would be appreciated!
TIA
George

 
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