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HelicopterMain Discussion › Tilting to the right when decending?
11-20-2006 06:52 PM  11 years agoPost 1
MrMel

rrProfessor

Gotland

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What is the cause for my Logo 14 want to tilt pretty hard to the right (you really have to correct) when doing a slow descend, doesnt matter if its windy or not.

I thought it was my paddles that was mis-aligned, but after fixing them today the problem still exists.

Swash is leveled through out the whole pitch range, so thats not it.

Any ideas?

Im running 600 mm radix blades and 85mm V-Paddles.

No issues in hover or FFF, even if descending in FFF its no issue.
Ps: Logo 14 does not have adjustable phasering, so that I cant trim.

- Fredrik

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11-20-2006 07:01 PM  11 years agoPost 2
Portblock

rrVeteran

Van Nuys, CA

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This is out of my area, but here is my 2 cents, when you spind the main blades, does the tail spin?

All I can think of is like the raptor 30, durring an auto, the tail does not spin.

So when spooled up, it tilts slightly to one side due to tail fan, but when you are slowing down, I wonder if your blades take over becouse they might not be slowing as fast as the motor slows, and the one way bearing comes into play, and you lose the tail fan.

Just an idea, and I may be totaly off base. in fact, I more than likely am way wrong, but it was an interesting idea

The voices in my head can beat up the voices in your head.

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11-20-2006 07:03 PM  11 years agoPost 3
MrMel

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Gotland

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L14 has driven tail, so thats not it in this case.

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11-20-2006 07:57 PM  11 years agoPost 4
shawgl

rrKey Veteran

Murrieta, CA

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I assume you are talking about it is tilting in the roll axis, if this is the case... Take this into consideration. It has a clockwise rotating blade and the advancing blade provides more lift than the retreating blade which causes your problem. You can correct for it by mixing but then it will throw off your forward flight characteristics or you can just leard to deal with it.

In God we trust, everyone else we monitor.

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11-20-2006 08:54 PM  11 years agoPost 5
Yug

rrMaster

UK. Herts

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is it eCCPM ?
How does it hover inverted as well as full power inverted climbouts?

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11-20-2006 08:57 PM  11 years agoPost 6
MrMel

rrProfessor

Gotland

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I assume you are talking about it is tilting in the roll axis, if this is the case... Take this into consideration. It has a clockwise rotating blade and the advancing blade provides more lift than the retreating blade which causes your problem. You can correct for it by mixing but then it will throw off your forward flight characteristics or you can just leard to deal with it.
Ok, I can live with it, just wondered if its was something I missed in the setup.
is it eCCPM ?
How does it hover inverted as well as full power inverted climbouts?
Yep, its eCCMP, and the eCCMP mixes is setup 100% perfect (no interaction at any command).
Inverted climb and hover is rock solid, and straight

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11-20-2006 09:01 PM  11 years agoPost 7
crcflyer14

rrApprentice

dallas

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dissymetery of lift!!!!!!!!!

it will really show its nasty characterists!!!!! When you start to approach retreating blade stall which is probally what is happening in your autos, keep them blads turning!!!! what kinda blades you using.

Chad

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11-20-2006 09:03 PM  11 years agoPost 8
crcflyer14

rrApprentice

dallas

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I see the blades in your post. Can't realy say I like my radix in auto!! Just my opinion.. the TT blades auto GREAT!!!!! if your into autos,

chad

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11-20-2006 09:07 PM  11 years agoPost 9
MrMel

rrProfessor

Gotland

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This dont only happenes in autos but in regular descent at full RPM as well (even more so then).

But when you come to say so, It can have started to happen when I changed to Radix, gonna bring a set of V-blades with me next time I fly to change so I can test back-to-back.

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11-21-2006 04:12 AM  11 years agoPost 10
crcflyer14

rrApprentice

dallas

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let us know how the test goes, I don;t have a set of 600 Vblades, and would love to hear your experiences with them, I betcha it has alot to do with the blades... but you never know till you try

Chad

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11-21-2006 12:22 PM  11 years agoPost 11
NitroPolymer

rrVeteran

Southeast Florida

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Does a making descent with forward airspeed vs. a descent in a hover change the amount of uncommanded roll you are getting?

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11-21-2006 04:55 PM  11 years agoPost 12
Barney

rrKey Veteran

Inverness Scotland

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Mr Mel Your Logo may have non adjustable phasing, but your Tx certainly will!

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11-21-2006 05:22 PM  11 years agoPost 13
MrMel

rrProfessor

Gotland

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Mr Mel Your Logo may have non adjustable phasing, but your Tx certainly will!
Your right, and in the radio I have setup the mixes so it flies like a dream (except this darn issue).

I was hoping to try the other blades today, but the weather here in sweden decided otherwise... as usual.. Ahhh

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12-03-2006 07:45 PM  11 years agoPost 14
MrMel

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Gotland

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To close this issue, it was the radix blades which this happened to, when I switched to VBlades the issue was totally gone.

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12-03-2006 08:00 PM  11 years agoPost 15
DaveInPA

rrNovice

Oxford, PA

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Check the gears in your servos. My SE 450 did the same thing. Here the servos were getting jammed on the gear where the missing teeth were.

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12-03-2006 08:08 PM  11 years agoPost 16
MrMel

rrProfessor

Gotland

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Ehh, See my last post, it was the Radix blades which caused it, I guess they dont hold well in turbolent air.

Im closing the topic now, added that last response for anyone searching in the future.

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