scawein

General Question:

A Saito 100 weighs 20 oz while a YS 91 weighs 26 oz

Will I get better performance from the YS even though I am increasing the overall weight of the plane by 6 oz. ???

I am trying to decide which engine will be a better application for the Ace RC Staudacher (60 size). I think the Saito 100 may be the better choice due to weight. The plane will weigh 7-8lbs full up. I know the YS touts more RPM, but does the RPM increase "outweigh" (no pun intended) the added weight of the YS over the Saito????

Thanks for any input

Ollie

The plane with the lightest wing loading will be able to fly slower and turn tighter. A six percent difference in wing loading only results in a three percent decrease in air speed in horizontal flight. The plane with the best static thrust to weight ratio will perform better on a vertical line. The force that is left over after weight and drag are subtracted from thrust is available to accelerate the plane vertically.

TerrellFlyer

MY CHOICE IS THE SAITO 100,IT'S LIGHTER AND OPERATES AT A LOWER RPM WITH A LARGER PROP AND LESS PITCH,MY .O2'S.

scawein

got both replies, thanks so much.....

Will the lower rpms from the saito 100 allow for better vertical??? I know pattern planes usually use lower pitch props than the 6-8 pitch I am used to using.

I would like to use this plane for hovering, etc.....but I am a sport flyer. I fly a SIG something Extra (40 size w/Magnum 91 4S) turning a 13x8 APC prop. It weighs 6 lbs ready dry and gives unlimited vertical. I would like to try to gain this same weight to thrust ratio with my new plane.

Does anybody know static thrust numbers for the Saito 100 and the YS91??? I know props make a difference, but a relative ballpark number would be helpful.

This rcu wokrs well, thanks for the input