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Home✈️Aircraft🚁Helicoptere-AlignOther › Collective Management
07-20-2006 12:51 AM  14 years ago
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k_h_d

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Evansville

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Collective Management
Can someone explain what constitutes good collective management as it relates to standard forward flight as well as 3D? Now that I am getting pretty comfortable with fast forward flight I am trying to fly with the left stick as close to center (0 pitch) as I can without loosing altitude in forward flight. I am also trying to make as small as possible adjustments to collective for altitude changes. Will things like this increase flight times?

When I was hovering I would fly 10 minutes with plenty of capacity to spare. Now with fast forward flight and banking turns and stall turns I am seeing much more capacity drainage at 8 minutes (1900mah of the 2100mah total).


Thanks,
k_h_d
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07-20-2006 01:09 AM  14 years ago
copterklutz

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Western Massachusetts

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In my humble opinion, good collective management will make your FF flying seem more realistic and "scale". In 3D, good collective management will prevent nasty boom strikes....




" Well, Um.... it's fixable......"
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07-20-2006 02:40 AM  14 years ago
jh4db536

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Monterey Park, California

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when youre doing 3d, collective management/headspeed management becomes critical.

like if youre pounding it too hard during tic tocs for example, a 'thrust' will (bog the headspeed down/draw too many amps/voltage drop, etc - stressing the whole system) you wont have enough power for the 'rebound' (it takes some time after to recover the lost rpm). if youre doing this low, you might plant it because you might run out of power to rebound/recover. the tail could blow out during this moment of weakness too.

with collective management, you arent smashing the stick. you are giving it exactly enough thrust to go one way, then the perfect amount of thrust to stop it and rebound. on top of this, you are staying in zero pitch between thrusts to unload the head and let it recover headspeed. timing is very important too. cyclic management/avoiding the vortex effect/using translational lift/etc etc etc

i dont think we trex owners notice bogging as much as some nitros do. i seen a R50 lose so much power and headspeed during multiple tocs. you could hear it and it sounds like the engine is way overworked, but then you hear it recover a lot of rpm when they let off. it's probably even worst trying to 3d a 30 size.
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07-20-2006 02:47 AM  14 years ago
SuperCobra

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LV. NV. USA/Ca l.a

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So it would be really hard to learn Collective Management in a sim? Guess u cant get boom strikes in the simulator.Sammy
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07-20-2006 03:42 AM  14 years ago
3D WASP

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Home of the Reagan Library, CA

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So it would be really hard to learn Collective Management in a sim?
No sir, you can absolutely learn good collective management in the sim. Good collective management comes from stick time, period. The more you fly the better it gets. I wouldn't judge good collective management off of doing a boom strike or not, if your running carbon blades with semi-stiff dampening, it is going to be hard to have a boomstrike. To practice your collective management try to do real smooth stationary flips, or some tail slides with a nice smooth pull out. Learning to pitch pump really helps the collective management as well. And has been said before collective management is all about keeping that headspeed up!
Timing is everything
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07-21-2006 04:28 PM  14 years ago
jcrack_corn

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End of Time

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yeah, just give it stick time....at some point when things happen during a maneuver, you will be comfortable just correcting it...so you will do rolls/flips/whatever and you might be real gentle on the collective, nice power no bogging, and uh ohh, loosing a little bit of altitude there, let me give it a little more pos or neg pitch to correct that, and you will just bump it up.....instead of slamming it, lol.

Just takes time.....just like when you get to the point that your tail blowing out is more of a nuisance than a problem (instead of "oohh crap, i came out of the flip nose in, and at a 45 degree angle, DITCH" you say "GDAMN TREX TAIL" then you make an adjustment and try to recreate the problem, lol).

takes time for your ears to learn to really hear bogging and have your brain tell you why (instead of worrying about finishing the manuever, you actually can relax and pay attention to the sounds of the manuever)..
------------------------------------------------------------------
do it inverted
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07-21-2006 07:22 PM  14 years ago
AlanR8

rrKey Veteran

High Crompton, Manchester. UK

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The Rex has an excellent power to weight ratio...so does my Raptor 90! But, you can bog both down if you're not careful.

When you start to throw the heli round a bit, you tend to over pitch the dynamics resulting in a noticeable slow down of the head speed. Once you get more comfortable with aerobatics you'll naturally use less collective unless you really BEASTING it!

It amazes me how LITTLE collective it takes to flip my 90 in any direction, as fast as it will flip/roll! But, when I first did it the stick went from top to bottom!

CM comes with experience
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