RunRyder RC
 2  Topic Subscribe
WATCH
 1 page 777 views
Scorpion Power Scorpion Power
Helicopter
e-
Century Radikal E640 - Swift 16 NX
› Swift Sensitive to Balance?
08-09-2007 02:13 PM  10 years agoPost 1
LJS

rrKey Veteran

Minnesota, USA

My Posts: All  Forum  Topic

Hi All,

I've been flying my Swift quite a bit lately. I've been working on flying around inverted, and I'm finding that I have to hold a lot of up elevator when inverted. I also come out of rolls with the tail hanging low. The heli is well trimmed for upright flight.

The only thing that I can think of is that it needs nose weight. If I add weight to the nose (move the battery foward), then I'll require some up trim and that should take care of my problem.

The only reason I'm doing the post is because the heli already seems well balanced. When I pick it up by the grips, it hangs level (I haven't put a level on the boom yet, but I will).

What do you think?

Thanks!

LJS

Logo 600 VBar, 10S
TRex 600E VBar, 8S
Logo 500 VBar, 6S
TRex 600ESP, 6S

PM  EMAIL  GALLERY  Attn:RR  Quote
08-09-2007 02:30 PM  10 years agoPost 2
Pistol Pete

rrProfessor

Seffner, FL

My Posts: All  Forum  Topic

Try picking up by the blade grips and hold heli SIDEWAYS...this is the best way to to tell where to place batt for fore and aft balance.

By this I mean when viewed from behind or front...turn heli 90 degrees left or right...either way works.

(blades extended of course )

~~Enjoying the hobby one flight at a time~~

PM  EMAIL  HOMEPAGE  GALLERY  BLOGAttn:RR  Quote
08-09-2007 02:36 PM  10 years agoPost 3
LJS

rrKey Veteran

Minnesota, USA

My Posts: All  Forum  Topic

Excellent idea. I'll give it a try tonight.

What's an Ameros?

LJS

Logo 600 VBar, 10S
TRex 600E VBar, 8S
Logo 500 VBar, 6S
TRex 600ESP, 6S

PM  EMAIL  GALLERY  Attn:RR  Quote
08-09-2007 05:18 PM  10 years agoPost 4
Ronald Thomas

rrMaster

Gainesville, Fl, USA

My Posts: All  Forum  Topic

Some new kind of currency.

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

PM  EMAIL  GALLERY  Attn:RR  Quote
08-10-2007 01:26 PM  10 years agoPost 5
Climax

rrVeteran

West London, United​Kingdom

My Posts: All  Forum  Topic

A bit like the Euro...

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
08-10-2007 02:02 PM  10 years agoPost 6
LJS

rrKey Veteran

Minnesota, USA

My Posts: All  Forum  Topic

Hi All,

Well, I checked the CG according to Pete's recommendation. It was harder to do than I thought it would be. It's hard to support the shaft in two places when the heli is on its side. But I got it done.

I moved the battery forward about half an inch. It appeared to balance at that point pretty well. Next, I test flew it. It was better, but the tail still dropped in the rolls, and I still needed to hold up elevator in inverted flight.

So I went home and moved the battery as far forward as I can get it. The front of the battery is now a full inch in front of the battery tray. And it's a very heavy 5000 mah pack.

I'm hoping this takes care of it. I wanted to test it this morning, but I found something wrong with my airborne battery, so I'll need to make a trip to the hobby store at lunch for a replacement.

I'll keep you posted. In the meantime, I'll take any other ideas on how to make my Swift fly hands off right side up and upside down.

Thanks.

LJS

Logo 600 VBar, 10S
TRex 600E VBar, 8S
Logo 500 VBar, 6S
TRex 600ESP, 6S

PM  EMAIL  GALLERY  Attn:RR  Quote
08-10-2007 03:28 PM  10 years agoPost 7
sreuss

rrApprentice

Ontario, Canada

My Posts: All  Forum  Topic

I'm flying the Swift 550 and haven't found it too sensitive to balance. I check my heli's balance by supporting it by the flybar. NOTE: do this right where it goes into the seesaw/flybar carrier; any further out and you'll bend the flybar.

Rather than the weight distribution (and resulting trim requirements) I suspect that your CCPM linkage setup is not quite as good as it could be. Everything needs to be symmetrical about center stick/zero collective pitch. In order to do this, you'll need to ensure that all control rods are at 90 degree angles to their respective control arms when the servos are in the zero collective position. Note that if you use a lot of subtrim on the ail/elev/pitch channels, this can really thow things off.

Feel free to ask if you want more specific information.

Cheers,
Steve

PM  EMAIL  GALLERY  Attn:RR  Quote
08-12-2007 03:14 AM  10 years agoPost 8
soberflierross

rrApprentice

Cottage Grove, MN​USA

My Posts: All  Forum  Topic

When you find out how to get them to hover perfect upside down and right side up let me know I can get my swift, 600, and lepton close but they always need a little down elevator inverted to hover perfect but I think the swift is a little more touchy to balance than my other 2, Ross

PM  EMAIL  GALLERY  Attn:RR  Quote
08-13-2007 02:05 PM  10 years agoPost 9
LJS

rrKey Veteran

Minnesota, USA

My Posts: All  Forum  Topic

Well, I moved the battery all the way forward to just behind the little hood scoop/vent in the canopy. It is now about 1 1/4" forward of where it was originally. The heli now flies level right side up and upside down. I'm pretty happy with it except I still get a little tail drop in my rolls.

Ross, it sounds like you have the opposite problem that I did. It sounds like your helis are a little nose heavy. The nice thing about the electrics is that you can shift the battery around a bit for significant changes in CG.

BTW Ross, I'm from Eagan. Where do you fly?

Keep 'em flying.

LJS

Logo 600 VBar, 10S
TRex 600E VBar, 8S
Logo 500 VBar, 6S
TRex 600ESP, 6S

PM  EMAIL  GALLERY  Attn:RR  Quote
08-13-2007 06:01 PM  10 years agoPost 10
soberflierross

rrApprentice

Cottage Grove, MN​USA

My Posts: All  Forum  Topic

I fly next to my house most of the time Ive flown at sodbusters in woodbury its pretty nice there and a couple of times out in shakopee next to valleyfair and you

PM  EMAIL  GALLERY  Attn:RR  Quote
08-28-2007 02:35 PM  10 years agoPost 11
LJS

rrKey Veteran

Minnesota, USA

My Posts: All  Forum  Topic

I've still been having a bit of trouble in having to hold up elevator when flying inverted. I don't like holding up elevator because that's the control that pulls you into the ground when you're flying low and inverted.

I had been trying to correct this by changing the CG. I moved everything forward. That helped but did not entirely eliminate the problem.

I couldn't find anything in my linkages that was causing the problem. The swash plate was level throughout the entire range of travel.

So I decided to mix in a little elevator with the pitch. I experimented a little and ended up with a 15% mix on both positive and negative pitch.

The results? Fantastic. The helicopter is now "honest" and flies level inverted and upright. I was concerned that I would get some spiral in the rolls, but the rolls are still axial.

That's the first time I've ever used mix. I'm very pleased with the results.

Keep 'em flying!

LJS

Logo 600 VBar, 10S
TRex 600E VBar, 8S
Logo 500 VBar, 6S
TRex 600ESP, 6S

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 777 views
Scorpion Power Scorpion Power
Helicopter
e-
Century Radikal E640 - Swift 16 NX
› Swift Sensitive to Balance?
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Saturday, November 18 - 5:57 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online