From 63bf166fab566bcd941d76ea058fe738f3a731c2 Mon Sep 17 00:00:00 2001 From: andy Date: Tue, 8 Feb 2005 20:24:52 +0000 Subject: [PATCH] Units bug in the moment doc. Discovered by Gerhard Wesp. --- Docs/README.yasim | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/Docs/README.yasim b/Docs/README.yasim index 27b6a6dbd..1c2c8cc66 100644 --- a/Docs/README.yasim +++ b/Docs/README.yasim @@ -184,16 +184,16 @@ propeller: A propeller. This element requires an engine subtag. will be) it should be set with an subelement. mass: The mass of the engine/propeller, in pounds. - moment: The moment, in kg-meters. This has to be + moment: The moment, in kg-meters^2. This has to be hand calculated and guessed at for now. A more automated system will be forthcoming. Use a negative moment value for counter-rotating ("European" -- CCW as seen from behind the prop) propellers. A good guess for this value is the radius of - the prop (m) times the mass (kg) divided by - two; that is the moment of a plain "stick" - bolted to the prop shaft. + the prop (in meters) squared times the mass + (kg) divided by three; that is the moment of + a plain "stick" bolted to the prop shaft. radius: The radius, in meters, or the propeller. cruise-speed: The max efficiency cruise speed of the propeller. Generally not the same as the