Announcement

**Baldie** · 11-03-2010, 03:53 PM

Hi there, Its a personal thing and different from heli to heli, But as a help for base settings, these are what i use behind the Revlock20

My curves are
Normal
Throttle , 0,,,, 30,,,,,57.5,,,,,,,,61,,,,,,,,63
Pitch ,,,,,,30.5,,,,inh,,,,,50,,,,,,inh,,,,,100 (If you cant set inh then set a value to half way between the two values)
Idle up 1
Throttle 85,,,,,73,,,,,60,,,,,,80,,,,,,100
Pitch ,,,,0,,,,25,,,,50,,,,,75,,,,,100

Hope this helps,
Simon

**jwmachon** · 11-03-2010, 05:50 PM

How does this look

Pitch cure -4,5.5,9 - 18,38,55,75,94

Throttle curve

20,40,50,60,100

this will be better transitioning on throttle to what i have at the moment no as bigger steps (smoother)

Cheers

**Farmer Giles** · 11-03-2010, 08:43 PM

I've put some comments on your other thread but I'll add something here to.

I use an OS37 on my Raptor and through trial and error I've tried to make the hovering head speed using my throttle curve mroe or less the same as when I engage my governor and I've ended up with a similar throttle curve to SILVERLYX above, with my 3/4 stick about 70%. So when I'm hovering about I can flick between normal and Idle up (which also sets the governor) and the headspeed does not change a great deal.

I presume you're not using a governor but my throttle curve is set a fair bit higher then your example through comparing the known headspeed with the governor to the throttle curve without the governor. I don't have a tach but my governed head speed is about 1850 RPM.

HTH

**jwmachon** · 13-03-2010, 12:19 PM

would 40,50,65,75,100 be better than 0,50,65,75,100 just wondering that revs will drop to much when desending

just asking

jonny

**Farmer Giles** · 13-03-2010, 04:38 PM

Originally posted by jwmachon View Post

would 40,50,65,75,100 be better than 0,50,65,75,100 just wondering that revs will drop to much when desending

just asking

jonny

With 40% as your bottom point you'll never get the engine to idle as it will always have 40% throttle opening when the stick is at it's lowest position. Also you'll be starting with 40% throttle and at 40% the clutch will almost certainly be engaged so you'll never be able to start it because as soon as it fires it will be racing away trying to turn the blades and that's not much help when you're in the pits and certainly very dangerous.

With the pitch curve you've got from the other thread your engine will probably never go below 65% or 70%, any less than that you're getting towards zero pitch and the heli will be losing height anyway. They say the hover point is about +6deg pitch so that would equate to about 75% throttle on the curves we said in the other thread so there is no issue with the head speed getting to low when your still flying around.

Hope that makes sense..

**jwmachon** · 13-03-2010, 06:24 PM

thats fine was just checking pal looking forward to next saturday to test i think i will be lifting at point 3 65% then i down to point 2 still at 50% when landing and negative pitch so that should be better no massive throttle changes to cause a kick

**trillian** · 13-03-2010, 06:40 PM

I took my Raptor 30 out today and after a few hovers and thinking the
elevator felt strange, someone else noticed one washout arm was loose
and when I tried to tighten it the threads in the washout guide were
obviously stripped as it just turned and didn't tighten so that grounded
mine for the day before I could fiddle with the curves.

**jwmachon** · 14-03-2010, 09:52 AM

one question i have not asked when doing these curves which i have now done where should my throttle trim be

Do i just increase the 0 - point 1 curve until i get a nice idle just before rotors turn and have trim in middle

Thanks

Jonny

**trillian** · 14-03-2010, 10:34 AM

My throttle curves always start at zero at the lowest point.

What you want on the trim is to have a reliable idle at some point on the trim but be able to shut the engine off by pulling it down. The trim won't affect the the rest of the throttle curve as it only comes into play when the stick is down (well, on the DX7 that's how it works).

**Mark_T** · 14-03-2010, 10:41 AM

I would suggest getting the mechanical linkage set right first then the rest rather follows from there.

Excellent walk-through of the process here - MyRaptor- R50V2 Throttle Linkage

**jwmachon** · 15-03-2010, 11:07 AM

if i try the throttle curves as suggested and it still does not work could it have anything to do with the Spektrum DS821 servo not been fast enough or not
Thanks
Jonny

**Farmer Giles** · 15-03-2010, 02:22 PM

having an old / slow servo on the tail will not help but if your still flying in rate mode then you're not giving the gyro a chance. In forward flight the gyro is not so important as you can fly the tail around it but when your trying to hover and land with continual changes in throttle and pitch then your gyro is working it's hardest to hold the tail in heading hold mode and you're not using that facility.

In the old days before HH gyros you had to program a mix into the TX to add more rudder as you increased throttle / pitch to counteract the additional torque. Have you set this mix up or are you just flying around it ?

Was it always like this or has the tail swinging habit started recently ??

**jwmachon** · 15-03-2010, 03:10 PM

think im going to hunt for a align ds650 servo then i know its all sorted on that front

**Farmer Giles** · 15-03-2010, 10:08 PM

Originally posted by jwmachon View Post

think im going to hunt for a align ds650 servo then i know its all sorted on that front

If you're thinking about buying a new servo then why not look on here for a s/h DS620 and GP750 combo. They come up all the time when people buy a heli combo deal but already have a tail servo and gyro.

It's a fit and forget set up IMO, it's what I've got on my Raptor 30 and it works great.

Even if you buy a great servo it's still connected to an clone gyro, and it's a clone of a gyro that's quite a few years old now.

2p

Announcement

Raptor 30 v2 Throttle Curve

Raptor 30 v2 Throttle Curve

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