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Pulsar xp cruise speed


Guest harwis

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Different propellers will make a difference, do you know what prop the advertised aircraft's speed was? Is it the same as your friends.

 

By the way I'm no expert, just thought I'd throw that thought out there. 001_smile.gif.2cb759f06c4678ed4757932a99c02fa0.gif

 

 

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I know someone who has a TW Pulsar with the 80 HP Rotax motor with a ground adjustable Bolly prop, he reports a cruise speed of 125 knots.

I reckon thats the mark.Even though

the airframe is very efficent.On 80 HP 125 knots is great.I wouldnt ask for anymore than that.IMO

 

 

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I know someone who has a TW Pulsar with the 80 HP Rotax motor with a ground adjustable Bolly prop, he reports a cruise speed of 125 knots.

Do you know the ROTAX 80HP reduction 2.27 or 2.43? and propeller Diameter and Pitch. I think 2.27 reductin have higher speed then 2.43 and bigger pitch propeller can get higher speed in cruise but lost effciency at taking off. Is that right?

 

Harris

 

 

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Do you know the ROTAX 80HP reduction 2.27 or 2.43? and propeller Diameter and Pitch. I think 2.27 reductin have higher speed then 2.43 and bigger pitch propeller can get higher speed in cruise but lost effciency at taking off. Is that right?Harris

I don't know the gearbox ratio and I doubt the owner would either, a guess would be 2.43. From memory at the time there were two size Bolly prop blades available the Pulsar had the shorter ones. Again from memory the pitch angle was measured about 2/3 the distance out from the centre of the hub on the blade I am not sure but the angle may have been 17 deg. Yes you are right about the effect of pitch, the more pitch the faster the cruise (up to a certain point) and the climb on take off is reduced. I flew this plane a couple of times two up and found it a struggle to get off the ground but once you got to eighty knots (during climb out) everything started to work nicely, it really would have been a lot better with a constant speed prop. One up it was not really a problem, remember this is a tail wheel Pulsar the absence of a nose wheel would add a few knots.

Richard.

 

 

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