Holy Throttle!

[looseskr3w]

Hey guys,

I have been flying for a while now (Raptor 30 V2)(JR XP6102), but I have had it in beginner mode.

..where the pitch gradually increases with the throttle.

I just recently had someone help me set it up for 3D 'cause I thought I may be ready to give it a whirl

.....but when I hear the heli running at almost full throttle without taking off, I can say that I am not quite as relaxed as I used to be. :shock:



What can I do to make it more timid, can I simply adjust the throttle curve down say 20% at all 5 positions?? ...and if so, will I have to adjust the pitch curve accordingly?

According to my pitch guage, it is -7.5, 0, 7.5 ...or something close to that.


Anyone have any suggestions on what to do, I am too scared to fly like this, I am simply not ready.

[DavidH]

I would not suggest making the throttle curve 20% at all settings.

Don't know what motor you have in the heli. But most 30 size helis can handle a pitch range of +9 to -9. With that as the pitch range you would want the throttle curve to look like this in idle up flight condition.
Point 1 100%, 2 75%, 3 50%, 4 75%, 5 100%

In Normal flight mode. The 5 point curve will be a little different.

Point 1 0%, 2 15%, 3 35%, 4 60%, 5 100%

The above is just an example. It is to just give you an idea what to do in normal mode. Point 3 and 4 is the ones you will have to basically mess with to get the hover rpm you want in Normal mode. The model will hover with the throttle/collective approx at the 3/4 position. Approx halfway between mid stick and high stick.

As for the idle up throtte settings I posted above. They will be fairly close. You may have to mess with the point 3 to keep the head from overspeeding when the collective pitch is at 0 at mid stick.

David

[looseskr3w]

I guess my question really is

How do I stay in 3D mode with the engine at lower RPM's?

....I want the overall engine speed to be a little lower....I don't want it screaming...just a little below screaming.

:)


...and as for the throttle curve, I did not mean to set all points at 20%, I wanted to LOWER all points 20%.

Right now I have the curve:

100, 75, 50, 75, 100


Can I make it 80, 55, 30, 55, 80??

[DavidH]

Yes you can make it as you have posted. Don't know what your calling a screaming headspeed. But from helping pilots with Raptor 30's. My experience has been that they hover best at about 1600 rpm on the rotor head. And for aerobatics they seem to perform best when turning in the 1800-1900 rpm range.
Don't try to do aerobatics with the head turning too slow. The blades may lag during hard cyclic inputs and cause a boom strike.


David

[looseskr3w]

How am I supposed to tell how many RPM's the head is turning at?

A timing light?

[WillJames]

Find someone with an Optical Tach to help you. There are a lot of pilots in the NY,NJ,CT area who can help.

[WayneBrown]

You might need a different approach to your linkages, especially throttle.
Scroll though your ATV settings and see if you are limiting the throws excessively.
Ideally you would shoot for ATV at 100% and mechanically limit your throw by relocating the ball link on either the servo arm, throttle arm or both.
By mechanically setting it up, your 'center' is actually at the center of travel.
I would try reducing point 3 (center) until you can switch from normal to idle 1-2 without a great deal of increase in RPM. (this can be done on the bench by watching the arms for movement.)
Adjust points 2 & 4 to maintain a linear curve to the upper/lower limit of 100%.
My reasoning is that you won't be uncomfortable initially changing into idleup, and you will have plenty of available throttle to punch out when you need it.

[looseskr3w]

Thanks LameBird

I will try what you suggested.

Good Explanation too!

:)

[WayneBrown]

No problem, just take care not to have your headspeed to low as Divid pointed out, you will chop the boom off in flight.
It gets ugly right afterwards... :(

[playfair]

..where the pitch gradually increases with the throttle.
.....but when I hear the heli running at almost full throttle without taking off, I can say that I am not quite as relaxed as I used to be.

Your heli will perform MUCH better when the head speed doesn't change with pitch, which means it's going to be spinning as fast prior to take off as it does in a full power climb. Assuming your friend set it up right, you just have to get used to it. I know what you mean though; the first time a buddy test flew my bird in idle up I had to hide behind him!

Even though you can still use your normal mode for hovering around, it's nice to have responsiveness to get you out of trouble when needed.

[looseskr3w]

Well, I am proud to say that I left it how it was, and I love it.

Now it just seems like the throttle 'clicks' in my TX kinda F everything up.


Has anyone ever opened their TX and took them out??

:D

[DavidH]

The 6102 should be simple to adjust the ratchet on the throttle. If your comfortable doing it. Take the back off the transmitter. There will be piece of metal over the cam of the throttle control. I have not done a JR radio. But on Futaba you can remove this piece of metal and then turn it over and put it back in place. Then you should be able to get the feel on the throttle stick you want by bending the metal out or in. You want the stick to operate smoothly but not be too loose that it will fall under its own way when the TX is sitting upright.

David

[looseskr3w]

Thanks man I'm gonna do it!