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Blade 400 › 3D Lost my air 'Cushion' when close to the ground
07-10-2008 07:22 PM  9 years agoPost 1
biohzd79

rrNovice

SJ, jersey

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I am a new heliman with my Blade 400. I have flown about 25-35 times now. I broke a few pieces with the stock head and got sick of having order parts online so I decided to just upgrade to the CopterX full metal head. I figured that if I increase the pitch of the blades and decrease the head speed, I might have a slightly easier time learning to learn how to fly the heli without the tail pointing at me. I had a crash and replaced the blades with CopterX blades and now the heli flies horribly.

I followed sopals's videos and this other guy's videos on how to make everything level on the head. I set the transmitter back to stock throttle and pitch settings and it still flies horribly.

The problems in flight are:
1) It is extremely sensitive to throttle inputs and is hard to keep at a constant altitude.
2) When I first flew the heli, whenever I would get close to the ground, it would keep at a steady foot off the ground requiring no throttle input. Almost like a cushion of air. Now that cushion of air is gone.
3) The tail requires constant right stick. The gyro setting is at 78%, and before it would be at 65%.

What can I do to get this bird flying like it did when it was fresh out of the box?

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07-10-2008 08:38 PM  9 years agoPost 2
Heli 770

rrProfessor

USA.

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Put pitch and head speed back to were it was.

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07-10-2008 09:32 PM  9 years agoPost 3
biohzd79

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SJ, jersey

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I did. The throttle and pitch settings are the stock linear ones.

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07-10-2008 09:46 PM  9 years agoPost 4
Heli 770

rrProfessor

USA.

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I don't know about those blades, Did you balance them? If they are balanced. and your heli won't work right, I'd get the same blades you had on before. I think the vids you saw also has them on blade bal.
Good Luck!

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07-10-2008 10:19 PM  9 years agoPost 5
biohzd79

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SJ, jersey

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My blades are not balanced. I can't imagine it would affect it that much though.

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07-10-2008 10:22 PM  9 years agoPost 6
Heli 770

rrProfessor

USA.

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Are they of more than 2mm? If Yes you know what to do.

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07-10-2008 11:49 PM  9 years agoPost 7
biohzd79

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SJ, jersey

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I don't understand 'of more than 2mm'. I have never balanced the 3 set of blades that I have owned.

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07-11-2008 12:07 AM  9 years agoPost 8
Heli 770

rrProfessor

USA.

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biohzd79
Do a search on blade balance, here on RR. I always check for blade balance, If the blades are within 2 mm. of each other, than I don't balance, If it's more than 2 mm. off than I balance. There is three points to balance, You only have to get two of any of the three right.
It takes to long to give you a step by step. Do the search.
Good Luck!

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07-11-2008 01:02 AM  9 years agoPost 9
wthford

rrVeteran

Monticello, Illinois

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Cushion of air

This is called ground effect. It is not good to fly in ground effect. Better control of the machine will be obtained when out of ground effect. This is approximately as high as the blade span of any given machine. Picture it as a doughnut. If you want more information on this, try googling "helicopter ground effect".

Also, if you slow down head speed, you lose stability and control. I agree with the other guy... use the stock setup. It is actually a pretty good setup.

Horizon hit a home run with this machine. I couldn't believe that I could just take it out of the box, and it would fly so well. All I had to do was basically trim it in. The gyro isn't even all that bad. I do find myself flying the tail some though. I never really have been very patient when it comes to trying to dial a gyro in. When I first started flying helis, I didn't have one. I flew the tail all the time. My Schleuter Mini Boy had mechanical mixing throttle to tail. It actually sort of worked. I didn't start using a gyro until I started working at Horizon, about 5 years ago. It actually isn't that much different. But, I have had one on every heli I've had since. It does cut down on confusion when you are trying to learn nose in, and other such attitudes. But, I think that my lack of a gyro early on has made me more capable when it comes to tail/rudder control. I started flying planks later in my RC career, and it certainly helped me learning to fly them.

Anyway. Cheers! Happy flying!!

Oh, one more thing to research is the natural tendency for the heli to roll to the right (clockwise rotation) while in ground effect. There is no way to curcumvent this (other than manual contro (that I know of)). Even a machine in good trim will want to roll over to the right when lifting off. Be aware of this and be ready to compensate for it. This effect is most pronounced IN ground effect. Correct me if I'm wrong here guys.

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Blade 400 › 3D Lost my air 'Cushion' when close to the ground
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