Throttle / Pitch curve

[chrisdownes]

Can anyone give me any indication as to what the throttle / pitch curve settings should be on my helicopter / transmitter set up.

I have a Shuttle + Heli with an MDS 38 engine in it. The heli has standard 550mm blades. Transmitter is a JR2610.

I find when taking off I can get into the hover, but the engine sounds laboured as it gains height, as though the pitch setting is too much for the engine power.

[marktigere1]

Hi

I run -4, +6, +9 for my Shuttle which gives a head speed of 1550.

This is perfect for the Shuttle as it does not like any more head speed.

My throttle from memory is as follows:-

Normal: 15,45,75,85,100 (Spool up only)
Idle up 1: 75,75,75,85,100 (Switched to before take off)

I will need to check the throttle setting but they are approx.

You really need someone to tacho your head so as not to overspeed it and adjust your throttle curve not your pitch curve when doing so.

Thats what I use. Others may disagree.

Cheers

Mark

[robgt]

Don't forget that if the engine is not tuned properly, that will also give you the effect you're seeing - this is a fine balancing act between getting your settings (pitch and throttle curves) right, plus also tuning the engine right.

Cheers,
Rob

[marktigere1]

Yep, what Rob said

[chrisdownes]

I think the engine is tuned right, as it will rev to full throttle without hesitation if I set the throttle hold to 100% on the transmitter. Likewise, if I have the heli in the air and its struggling, if I switch the throttle hold on it revs fine up to max, but this is obviously putting far too much head speed on.

This makes me think its the pitch / throttle curve settings. I will have another play later in the week and see if I can improve the situation.

[robgt]

Sounds like your engine is probably tuned ok in that case and you just need to play with your throttle curve to make sure theres anough power at the relevant parts of your pitch curve.

What are your pitch and throttle curves currently set to, and what do your pitch curve percentages equate to in terms of pitch on the blades?

i.e. Is 50% pitch 0° or 5° or... etc?

Cheers,
Rob

[chrisdownes]

Sounds like your engine is probably tuned ok in that case and you just need to play with your throttle curve to make sure theres anough power at the relevant parts of your pitch curve.

What are your pitch and throttle curves currently set to, and what do your pitch curve percentages equate to in terms of pitch on the blades?

i.e. Is 50% pitch 0° or 5° or... etc?

Cheers,
Rob

That I dont know at the moment as I am at work, however when I get home I will have a look and post them up. Thanks for your help