ImRich
Veteran
Location: Derry, NH USA
My Posts This: Topic Forum | Ok, Call me dumb, but I thought I heard my engine loading. people told me that I was just hearing the enging load and not the rotor disk!
Well, I checked and I was at about +14 degrees of pitch! Wow, could that baby climb!
it did load up slightly, but it flew and climbed very strong.
After I realised what I had done, I did a quick check and reduced the pitch a bit to what seemed to not load the engine. the climbs were not as rocket fast, but at least the engine didn't load up, I was happy! 
When I got home, I checked and found that I was at about +12 degrees of pitch. Hmm.. that can't be right! Everyone says they use +10 degrees of pitch or the engine will load up and not run correctly. So I backed the max pitch down to +10.
I went to the field to check this out, thinking that all would be well. i could fly around at full collective all day long! However there was hardly any climb authority! The engine didnt' even seem to notice the load.
I'm using wood 690mm blades, My head speeds are 1500 hover, 1600 idle up 1, and 1700 idle up 2.
I shot for the following pitch ranges:
1500 rpm Hover: -5, 0, +5, +10 (min, center stick, hover, max)
1600 rpm idle1: -9, 0, +5, +10
1700 rpm idle2: -9, 0, +5, +10
hold: -5, 0, +5, +12
This didn't feel right at all! I seemed to barely be able to climb at all. Forward speed wasn't very fast and full collective didn't even sound like a load at all.
It seems like the following feels better without placing a too heavy load on the engine as the head speed seems constant to my ear:
1500 rpm Hover: -5, 0, +6, +12 (min, center stick, hover, max)
1600 rpm idle1: -9, 0, +6, +12
1700 rpm idle2: -9, 0, +6, +12
hold: -5, 0, +6, +14
At least this range would climb out ok! Does this look right? Is this due to me using wood blades? Perhaps the stiffer carbon blades load differently than the woodies? Or do I simply have an exceptionally strong running G230PUH?
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Rich |
