Microlighters

What would the ideal RPM setting be for a 503 cruising straight and level at +/- 50 miles/h? Is 5800 rpm too high?

My engine goes up to 6900rpm at full throttle.... any problems with that?

thanks
Jodie

5900 rpm straight and level, bar nuetral at 5000 asl.

5000 straight and level at 1500ft ASL one up. Take off it revs up to a smidgen below the red, 6900. That is with the three bladed AEROS prop.

Smokin'

soekiwindni wrote:What would the ideal RPM setting be for a 503 cruising straight and level at +/- 50 miles/h? Is 5800 rpm too high?

My engine goes up to 6900rpm at full throttle.... any problems with that?

thanks
Jodie

Yes, you are overreving the motor. Max rpm for 5 minutes is 6800. Max cruise RPM is 6500

The pitch of your prop blade is slightly low or you have a smaller prop, or your rpm guage is not reading correctly.

I would say your plane climbs great but obviously suffers on the cruise.

You want to cruise at 75% power which is about 5500 max

Hi Morph, Make it 3000 posts and get it over with!!

I have found the tachs that run off the 503 motor can be way out, i set mine up with a hand held laser type.

Nick.