The Critical Numbers

The versatile 3-axis Microlight from Rainbow Aircraft, manufactured completetly in South Africa.

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rod smith
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The Critical Numbers

Unread post by rod smith » Fri Mar 13, 2009 10:10 am

Am I the only one who would like one page with all the critical numbers in one place?
I have had a go at compliling such a list, and even now have left a few off (e.g landing and take-off roll). I also have only listed figures for the 582. Any comments and pointing out of errors would be welcome as I hope to start flying soon.

Thanks

Rod Smith

CRITICAL SPEEDS

ROTATE 45MPH
CLIMB VX 65MPH
VY 60MPH
CRUISE CLIMB 80MPH

DOWN WIND 80MPH=MAX 1ST FLAP
60MPH=MAX 2ND FLAP
or
APPROACH 1st FLAP=60MPH
2ndFLAP=50MPH
LANDING OVER FENCE=50MPH
TOUCHDOWN 45MPH cut throttle


STALL clean 40MPH
STALL 2nd flap 35MPH

BEST GLIDE 65MPH
TURBULENCE 90MPH MAX
MAN.SPEED 90MPH
MAX CR WIND 30MPH
65% CRUISE 75MPH
VNE 125MPH


ENGINE REVS AND TEMPS
Warm up at 2 000 for two minutes and then 2 500 until at normal ops temp:cylinder head 110 to 130 C Max=150 C WATER=MAX 80 C MIN=65 C
GROUND IDLE 2 200RPM
TAKE OFF 6 800RPM (max 5 minutes)
CLIMB OUT 6 400RPM??? (FLAPS UP @ 300FT)
MAX CONT 6 400RPM
CRUISE 5 500RPM
APPROACH 3 800RPM (on the glide slope)


MASS ISSUES
Max take off weight 560kg (LSA 450 CCM 450) (Really an insurance issue, not so much one of safety)
Empty 248kg
Useful load 312kg (includes fuel) LSA cat
A TYPICAL MAX LOAD - LSA CAT
(A CCM a/c will not be able to accord with such a load as it has a limit of 450kg for max take-off weight.)
Empty 250kg (as equipped)
Two crew 168kg (88 plus 80)
Equipment 15kg (gps, fire ext, first aid, etc)
Full fuel 90kg
Luggage 30kg
Last edited by rod smith on Sat Jan 30, 2010 6:48 pm, edited 3 times in total.
rod smith
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Re: The Critical Numbers

Unread post by rod smith » Fri Mar 13, 2009 10:14 am

PS to above post

One or two columns seemed to shift in the posting wrt the LSA/CCM issue and weights. I shall correct later.

Rod Smith
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Stephan van Tonder
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Re: The Critical Numbers

Unread post by Stephan van Tonder » Fri Mar 13, 2009 12:21 pm

Blue line ( 1st flap) on the one I fly (912S) is marked at 80mph and on 1 notch of flap we approach at 70 mph altough I'm sure 60 is safe in good weather.
Full fuel is 90 litres so only about 67 kg?
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Re: The Critical Numbers

Unread post by Big Al » Fri Mar 13, 2009 1:39 pm

Hi Rod

I am still a student and my figures for my cheetah are

climb out at 60mph
max rpm on 912 - 5100
after take offs at 200agl - flaps clean, fuel pump off, rpm to 4900
cruise at 4600rpm
finals 1st flap only approach 60mph, 50-55mph at threshhold
best rate 60mph
best angle 65mph

Allan
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Re: The Critical Numbers

Unread post by rod smith » Fri Mar 13, 2009 1:46 pm

Stephan, Thanks

The official manual for our a/c lists fuel capacity as 100 litres. One day when re-fueling I'll empty it and check and ammend my sheet accordingly. The flap figure is given differently in different places, hence my listing as one max. for flap application and for flying with flaps extended (no differentiation shown in the manual) and then a different speed for landing purposes.(Also from the manual.) Well get there in the end.

Rod
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Stephan van Tonder
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Re: The Critical Numbers

Unread post by Stephan van Tonder » Fri Mar 13, 2009 2:02 pm

Official fuel capacity is 100l yes - :oops: but I think if you fill it like that there is no space for expanstion and it's going to stink in the cabin.
Ok make that 74 kg then at 100l.
Max speed flap extend and fly with it extended is both 80 mph.
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Re: The Critical Numbers

Unread post by John Boucher » Sun Mar 15, 2009 1:10 pm

ROTATE 45MPH
CLIMB VX 65MPH
VY 60MPH
CRUISE CLIMB 90MPH
The cruise climb does not look right?
Grammarly is a wonderful thing!
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Re: The Critical Numbers

Unread post by Stephan van Tonder » Mon Mar 16, 2009 7:09 am

I'd put cruise climb at 80mph as well as maneuvering speed.
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Re: The Critical Numbers

Unread post by rod smith » Mon Mar 16, 2009 1:58 pm

Thanks for the replies so far, Gentlemen. I shall up-date when the response dry up. In the meantime we have emptied the tank and Stephan is right; it is not going to take 100 litres. But in the meantime, let's remember that I have only taken figures from the official Rainbow manual that came with the plane. All I am hoping to do is get them all onto one page. - even better if they are ammended by the reality of what the owners experience.

Rod Smith
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Re: The Critical Numbers

Unread post by Darius » Fri Apr 24, 2009 12:34 pm

Hi Guys

Sorry to jump to something else.

What is the Running cost per hour on the Cheetah XLS 912S engine

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