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Other › head speed
11-21-2006 11:11 PM  11 years agoPost 1
taterm6

rrNovice

Fayetteville, GA

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On my sa I am running the 13 tooth pinion. I had my normal throttle curve at 0, 65, 95 but have changed it to 0, 75, 75. It is alot easier to control it vertical. before it would be sensitive to bob up and down and now i just control with the pitch. my question is should i go higher than 75? I do not do 3d. For right now i am just learning and flying around slowly. i am using the align 430L 3550 kv motor with the 13 tooth pinion. I just want to make sure i have enough calculated head speed to control with pitch.

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11-21-2006 11:27 PM  11 years agoPost 2
ktm520

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newburgh, in

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i'm using a 11t on a 430L for hovering/FF. this has plenty of power/headspeed for flying around. i've actually bought a 9t, but i haven't tried it yet. you will get longer run times with the smaller pinion and still have plenty of headspeed for sport flying. i'm using a 0-65-85-90-95 throttle curve, and my pitch is setup for -3, +3, +9.

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11-21-2006 11:44 PM  11 years agoPost 3
3410253

rrApprentice

TUCSON,AZ

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head speed @2100??
is that a good head speed

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11-22-2006 12:09 AM  11 years agoPost 4
TrexRookie

rrKey Veteran

San Francisco, CA

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For basic flight you want your headspeed between 2200-2400rpm.

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11-22-2006 12:12 AM  11 years agoPost 5
3410253

rrApprentice

TUCSON,AZ

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Thanks

and 3D @ 3000 is this right

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11-22-2006 12:48 AM  11 years agoPost 6
taterm6

rrNovice

Fayetteville, GA

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What do you think is the best combo for battery life, head speed?

11 tooth, 85% throttle

13 tooth, 75% throttle

....or your suggestion

I am just trying to maximize my battery run time while maintaining the correct head speed. I am just doing normal flight (hovering, slow ff).

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11-22-2006 12:57 AM  11 years agoPost 7
Tail_BoomStrike

rrKey Veteran

N.A.

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2000 good enough for regular flying, be it hovering or circuits, less sensitive. 2400-2600 Very good 3D with +/10*. 3000 for hardcore.

I'm on the 2400-2600 @95% and could do a lot. Vertical and aileron tic toc not a problem. Got a lot of punch for climb out. I'm not hardcore so I guess I don't need 3000. Just mentioning cause it seems a lot of people think even basic 3D requires insane headspeed.

Even at 2200-2300 you could do tumbles, axial roll, loops, stationary flips, anything that doesn't require multiple succesive maneuver.

taterm6

11T with 0-60-95 or anything close to that so motor don't get too hot and flight is longer, thats with 3*/0*/10*

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11-22-2006 01:01 AM  11 years agoPost 8
taterm6

rrNovice

Fayetteville, GA

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Here is my calculation....

11.1 volt pack
150 tooth main gear
11 tooth pinion
3550 kv motor
.90 drag coefficent

HEAD SPEED 2601
@85% = 2210 Head speed

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11-22-2006 01:16 AM  11 years agoPost 9
Tail_BoomStrike

rrKey Veteran

N.A.

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Yup, but I tached mine on that same configuration 100%Thr 0*, Never got over 2500. Its different in real life than in on paper.

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11-22-2006 03:45 AM  11 years agoPost 10
taterm6

rrNovice

Fayetteville, GA

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Just spent the last few hours trying out my two configs above and to me it is so much better with the 13 tooth and 0, 75, 75. my pitch curve is -3, 0, +10. with the 11 tooth it wants to bobble up and down too much.....

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11-22-2006 03:50 AM  11 years agoPost 11
slider46

rrProfessor

Ocala Florida

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Go to 100% and quit worring about an extra 30 seconds of flite time I run an 11T on my XL and get almost 10 min. I have the 13 T on my SE and it is way more stable but I only get 9 min of flite time... I just fly it around until the timer goes off and grab the other bird while the battery is charging... Unless your doing 3D stuff your not going to use the 100% throttle for any turn or bail out.....

Tom..... No "D" flying....

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11-22-2006 04:00 AM  11 years agoPost 12
taterm6

rrNovice

Fayetteville, GA

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if i upgrade my main gear which brand would you go with? I am asumeing i would get a cnc aluminum but how does that stay cool...metal to metal.

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11-22-2006 03:42 PM  11 years agoPost 13
gullie667

rrVeteran

Brooklyn, NY

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It sounds like your speed control is in govenor mode. In govenror mode you should have a flat throttle curve. If you have three points it should be 0, 75 ,75 in normal and 85, 85, 85 in idle up. With five it would be 0, 75, 75, 75, 75.

Otherwise your ESC is going to be constantly adjusting the rotor RPM and producing the bob yuu mention.

If you want an actual throttle curve turn off govenor mode.

I don't use a governor mode on my TREX b/c it drains the battery much more quickly becasue it is really working the throttle to keep head speed very stable.

Gullie

Helicopters - 1000 parts flying in formation.

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