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Fast Lad Performance . Ace Hobby . Esprit Model

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Beginners Corner > Hover Pitch question
 
 
Chris Hinds
Senior Heliman
Location: Houston, Renfrewshire, Scotland

I have now about two gallons of flight time on my Moskito and aside from it eating tail belts it has been reliable. Thing is I was looking at my curves and I think my headspeed may be too low. It is where the only other local pilot set it but it would seem to be too low.

I am running 73.5% on the pitch in the hover (about 7 degrees) with 60% throttle.

This is with an O.S. 50 and CP12.5 and the standard 51.5cm wood blades. I know the mossie has a low gear ratio (7.7:1) but I still think that I am over pitched in the hover. It is silky smooth, but just seems like I need too much hover pitch.

Any opinions?

Thanks

Chris
02-22-2002 Over year old.
 
 
Rotary Flyer
Senior Heliman
Location: North UK

I run 1500 rpm head speed on my Mozzies, or there abouts! I set them up from the start with about 5.5 / 6 degrees at half stick, and approx. half throttle barrel opening. This is a good ball-park and they will hover near enough at half stick with this. I then fine tune the throttle or pitch slightly with the hover throttle/pitch digital buttons (Sanwa RD6000). Mid stick is round about 55% throttle, 58% pitch looking at my radio. All my models vary slightly in the set-up but not far from these figures. I found the 10% expo on ail. and elev. was good as well, with 5% on rudder. Just makes it feel better.
If you are feeling flush, I would upgrade to the longer boom / belt and a longer set of blades. Standard blades from the Sport are 54 or 55 cms. Plenty of cheap wooden blades about that size, for less than 20 quid. Booms are cheap , not sure on belt price, but won`t be a fortune. You will know, seeing as how you`ve had a few !! (sorry Mate)
The longer blades certainly will make it hover better. I have gone to 60 cm sets on 2 of my Mozzies, they fly great on `em. The Robinson I`ve got has 58 cm NHP`s on it, cut down from a set of 60 class blades, big cord, high lift, semi`s. (used to have a Lazer 70 in the Heli so it needed some help)
JM2pW
02-22-2002 Over year old.
 
 
Chris Hinds
Senior Heliman
Location: Houston, Renfrewshire, Scotland

Think I might have had it a bit wrong thinking my headspeed was low... I tached the head this morning using my TNC (aircraft) tacho at 1900rpm!!! Could it be that the experience heli pilot set it up by the note of the engine and given the Mossie's low gearing of 7.7:1 not 9.3:1 has got him thinking the head is turning slower than it really is?

I an definately running just over 6.5 deg of pitch in the hover - sounds like the longer boom and blades are needed.

Thanks again Rotary


Chris
02-23-2002 Over year old.
 
 
1 page421 viewsPOST REPLY
Thunder Power RC . Mikado Modellhubschrauber . GrandRC

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Beginners Corner > Hover Pitch question
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