I have had my existing warp drive balanced and have a hard time to find the right pitch for my blades does anybody out there no what the correct pitching is and from what point of the blade it is measured from 582 with e box
Pitching of blades
-
Gaylord Focker
- Whats the right frequency?
- Posts: 287
- Joined: Sun Jun 05, 2005 3:27 pm
- Location: Lanseria International Airport
Pitching of blades
Hi to all everybody and anybody
I have had my existing warp drive balanced and have a hard time to find the right pitch for my blades does anybody out there no what the correct pitching is and from what point of the blade it is measured from 582 with e box
I have had my existing warp drive balanced and have a hard time to find the right pitch for my blades does anybody out there no what the correct pitching is and from what point of the blade it is measured from 582 with e box
Wild Chicks,Cold beer,KY Jelly and Gt450 Nothing else required!!!!!!!!!
THE FORCE IS STRONG ON THE DARK SIDE
THE FORCE IS STRONG ON THE DARK SIDE
Fiddler
this all depends on the plane and what you are trying to achieve.
Start with you static RPM, this is the max RPM the motor with rev to with the plane secured to the ground. Measure this.
If the Static RPM is lowish i.e. +/- 6000 it means that the blade pitch is set quite high. The advantage of this is a better cruise speed but poorer climb performance. If your static RPM is high, i.e. 6800 then the prop pitch is lower and you will get better climb and less speed. By increasing the pitch of the prop you increase the loading on the motor and thus reduces the max RPM the motor can run to.
Also check your EGT temps. If they are running high your engine is generally lightly loaded and by increasing the loading by increasing the pitch you can bring it down.
Make sure the plane is standing in a normal attitude that you can repeat eveytime, i.e. on all wheels, on a flat piece of ground.
Using a protractor measure the pitch on each prop at the same point. Stand on the left, rotate the prop until the blade is horizontal to the ground and measure the pitch. then rotate to the next blade and repeat etc. They should all be the same.
Now you need to decide what you would like to achieve. More speed or less, better climb or less, reduction in EGT temps. Increase/decrease the pitch by 1/2 a degree at a time, start her up and measure the static RPM.
Watch the EGT's all the time and make sure you don't get them too hot. Make sure you don't exceed the max revs of the motor according to the spec.
A few degrees change makes a massive change, 2 degrees was all I needed to take my plane from 6250 to 6800, but this then moved my cruise rpm up from 5000 rpm to 5400 solo and 5400 to 5800 dual. I didn't like running the motor so high so I eventually reverted to the static of 6250. Horses for courses they say.
Here is the website for WARP
http://www.warpdriveprops.com/
this all depends on the plane and what you are trying to achieve.
Start with you static RPM, this is the max RPM the motor with rev to with the plane secured to the ground. Measure this.
If the Static RPM is lowish i.e. +/- 6000 it means that the blade pitch is set quite high. The advantage of this is a better cruise speed but poorer climb performance. If your static RPM is high, i.e. 6800 then the prop pitch is lower and you will get better climb and less speed. By increasing the pitch of the prop you increase the loading on the motor and thus reduces the max RPM the motor can run to.
Also check your EGT temps. If they are running high your engine is generally lightly loaded and by increasing the loading by increasing the pitch you can bring it down.
Make sure the plane is standing in a normal attitude that you can repeat eveytime, i.e. on all wheels, on a flat piece of ground.
Using a protractor measure the pitch on each prop at the same point. Stand on the left, rotate the prop until the blade is horizontal to the ground and measure the pitch. then rotate to the next blade and repeat etc. They should all be the same.
Now you need to decide what you would like to achieve. More speed or less, better climb or less, reduction in EGT temps. Increase/decrease the pitch by 1/2 a degree at a time, start her up and measure the static RPM.
Watch the EGT's all the time and make sure you don't get them too hot. Make sure you don't exceed the max revs of the motor according to the spec.
A few degrees change makes a massive change, 2 degrees was all I needed to take my plane from 6250 to 6800, but this then moved my cruise rpm up from 5000 rpm to 5400 solo and 5400 to 5800 dual. I didn't like running the motor so high so I eventually reverted to the static of 6250. Horses for courses they say.
Here is the website for WARP
http://www.warpdriveprops.com/
Greg Perkins
Who is online
Users browsing this forum: No registered users and 4 guests