Originally Posted by
jkr_1100
create a chart of all engines, there weight, and power and then map them out in a chart
you will find the Saito 1.25 has the highest power to weight ratio of any engine.
ahh statistics
Originally Posted by
SrTelemaster150
According to
SAITO'S OWN SPECIFICATIONS:
FA-115 2.1 HP 586g = 3.58 HP per Kg
FA-125 2.2 HP 620g = 3,55 HP per Kg
FA-100 1.8 HP 550g = 3.27 HP per Kg
Seems that the FA-115 has a slightly better power to weight ratio than the FA-125 and significantly better than the FA-100..
Comparing bore/stroke:
FA-115 31.7mm/24mm is 32% over square
FA-125 31.7mm/26mm is 22% over square
FA-100 29.0mm/26mm is 12% over square.
We are not pulling stumps here, we are turning propellers at near peak HP static.
Originally Posted by
the Wasp
but those numbers are at full throttle/peak power, what about at 1/2 (4500) throttle or 1/4 (3000) throttle or 3/4 (6500) throttle ??
Jim
The original post was all about how the FA-125 had the highest power to weight ratio. Which, if one is to believe Saito's own specifications, it does not.
But if you must insert added criteria to defend the FA-125
, how about the added fuel consumption of the FA-125 over the FA-115 which will necessitate added fuel load in the aircraft for a given flight time/range thus diminishing the power to weight ratio even further.
Last edited by SrTelemaster150; 12-14-2017 at 07:58 PM.