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

 
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