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HelicopterHIROBOOther › Freya 680 w/os 70 bogging
12-08-2004 08:34 PM  13 years agoPost 1
dlmob

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Andover, MA.

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I'm having problems with my freya bogging when I come out of a role. I'm running 680 blades, os70, cool power 30%, and a GV-1. Would this be caused by to low of a head speed on the GV-1. Any suggestions would be greatly appreciated

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12-08-2004 08:43 PM  13 years agoPost 2
dlmob

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Andover, MA.

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My headspeed in idle up 1 is 1736 should I bump it up to 1750 or 1800?

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12-08-2004 08:56 PM  13 years agoPost 3
RussR

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Tampa, Florida

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A couple of thoughts:

How much cyclic are you running? Is the motor running rich? Make sure your mechanical set up on the throttle linkage is spot on even with the GV-1 in place. How does it respond with the GV1 off when you roll?

Russ

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12-08-2004 09:24 PM  13 years agoPost 4
dlmob

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Andover, MA.

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Make sure your mechanical set up on the throttle linkage is spot on even with the GV-1 in place.

How would I check this?

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12-08-2004 09:33 PM  13 years agoPost 5
daved26

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NJ USA

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i use the same setup w/o the governor. i find that the os70 has plenty of power to do this. what is your throttle setting (%) at the bottom of your V curve?

dave d

"I wish my 9C had a reset button"

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12-08-2004 09:43 PM  13 years agoPost 6
dlmob

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Andover, MA.

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At mid stick i.e the bottom of the v curve it's set at 50%.

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12-08-2004 09:51 PM  13 years agoPost 7
daved26

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NJ USA

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i have mine set to about 53-55%. i don't know if this is the problem but as you go inverted and move the collective to negative, you could be bringing that throttle down to low to recover. if this isn't the answer, you might need to enter the roll with more velocity. hope this helps.

dave d

"I wish my 9C had a reset button"

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12-08-2004 09:59 PM  13 years agoPost 8
airdodger

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Johnston USA

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Are you talking about a stationary roll or a foward flight roll? The higher head speed will certainly help and as posted raise the bottom curve some.But I suspect you are running too rich because I have no trouble with a sixty .Chris

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12-08-2004 10:00 PM  13 years agoPost 9
blakka_1

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London/Enfield

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how much cyclic pitch are you running?. too much will bog your heli down.

definatley up the head speed up 2 1750.

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12-08-2004 10:10 PM  13 years agoPost 10
dlmob

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Andover, MA.

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I'll change the headspeed. I've never check my cyclic pitch I'll have to do that. What should i have, and when checking for aileron pitch should the blades be perpendicaulr to the tail boom or parrallel? It the opposite of the aileron pitch for forward and backwards pitch correct?

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12-08-2004 10:15 PM  13 years agoPost 11
airdodger

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Johnston USA

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Six degrees is pretty standard if doing 3d maybe seven. In line with boom aileron,it will be apparent when you do it,don't forget to lock flybar if necessary. Chris

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12-08-2004 10:24 PM  13 years agoPost 12
blakka_1

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London/Enfield

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yep i agree with airdodger, you should have 6 degrees on cyclics, 7 if you want quicker cyclics for 3d.

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12-09-2004 02:06 AM  13 years agoPost 13
dlmob

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Andover, MA.

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Well my cyclic pites were at about 8-9 dergrees so this could explain it when I'm giving full right aileron to do the roll. I also bumped up the headspeed to 1750 If it continues I'll go up to 1800. I won't be able to test it till the weekend though.

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12-09-2004 02:18 PM  13 years agoPost 14
blakka_1

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London/Enfield

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Well 8 degrees cyclic pitch you can get away with if you have good dampening in your head, but 9 degrees cyclic pitch is to much and will bog your heli down, especially if your collective and cyclic management isn't good.

Adjust your heli to get 6 degrees on cyclic mate, best to be on the safe side. Also increase your head speed to 1750, and make sure your engine is not running to rich.

Once you have done that, give it another test flight, and give us some feedback.

Good luck

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12-16-2004 01:37 AM  13 years agoPost 15
dlmob

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Andover, MA.

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Well I didn't get to try my adjusments this weekend to figure out the bogging problem because, all of a sudden my engine quit when I was about to lift off, and it felt like it was siezed up. When I dropped the engine out and pulled the fan off, I found that the brass tapered collar was disintegrated. Luckily that was it because it's only a five dollar fix. But I was wondering if this is a common occurance in the freya's or x-spec's and what can I do to prevent it. Someone told me that I might have had the split in the collar over the slot for the woodruff key. Don't know though. Any tips would be great!

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12-16-2004 08:54 AM  13 years agoPost 16
mrNoodles

rrProfessor

Borlänge, Sweden

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But I was wondering if this is a common occurance in the freya's or x-spec's and what can I do to prevent it.
Been flying my Freya for 2 years without any problems with the collet, the XSpec uses a woodruff key so no collet to worry about on that one, the woodruff can perhaps break but I havent seen or heard anythink like that happend.
Make sure that the slot in the collet is turned 180 degrees from the woodruffkey slot in the crank and that the fanhub and prop nut is tightend.

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12-16-2004 12:20 PM  13 years agoPost 17
Kinger

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Granville, OH

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When I had my Freya, I just bought the X-Spec fan hub so that I didn't have to mess with the collet.

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12-16-2004 12:20 PM  13 years agoPost 18
I3DM

rrProfessor

Israel

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this is not a common problem (collet being rubbed to death) - youre the first guy we heard this happen to, but you got all the answers on the second thread about this i think...

good luck.

www.liorzahavi.com

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12-16-2004 07:59 PM  13 years agoPost 19
Alistair

rrKey Veteran

no where land

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9 degrees cyclic pitch is to much and will bog your heli down, especially if your collective and cyclic management isn't good.
lol......... sure it will lug it... once you get to that point you need to be more concerned 'bout the boom being chopped off

i fly with 8 degrees with no bother, but i'm not mashing the sticks all over the place.

i've been meaning to try 10 degrees but for some reason i've been thinking that is just quite a lot.

9 degrees is a lot for a 70 if you're not working the sticks -right-...

you'll be fine once you learn how to work it...

squigle

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