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Other › 600 Flybar Paddles on a 450!!!
03-19-2009 07:27 PM  8 years agoPost 21
McRex

rrVeteran

AZ-USA

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I need to put 450 paddles on my 600s!
That's the ticket!

Daniel, AMA # 923248

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03-20-2009 01:05 AM  8 years agoPost 22
Waco

rrApprentice

Bernalillo, New​Mexico USA

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Align makes heavier paddles (8.84g) for the 450. Part # HS1192. Go to
http://www.readyheli.com/HS1192_Fly...ms_p/hs1192.htm
These also have a thicker airfoil and add a measure of control over the stock ones. I use these with weights also.

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03-20-2009 03:08 AM  8 years agoPost 23
Zaneman007

rrElite Veteran

Texas - USA

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Now thats a thought.

Old Guys Rule!

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03-20-2009 01:49 PM  8 years agoPost 24
snjbird

rrKey Veteran

Kissimmee, Florida-​USA

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Calculations

Trex 450 flybar paddles FRONTAL SA (CF) (50mm * 4.3) = 215mm^2
7.8g

Trex 600 flybar paddles FRONTAL SA (CF) (80mm * 7.5) = 600mm^2
12g

Drag coefficient is 0.05 (standard heli "wing" [blade] coefficient)

Fd = (p(u^2)Cd * A)/2

Fd is the force of drag, which is by definition the force component in the direction of the flow velocity
p is the mass density of the fluid
u is the velocity of the object relative to the fluid
A is the reference area, in our case this is the frontal Surface
Cd is the drag coefficient

p = 1.2kg/m^3 (air at 20C) = 1.2g/mm (thank God for the metric system)
u = 2200rpm and flybar paddle length from shaft is 170mm = Pi(170*2) * 2200 = 39145mm/sec (or 39.146m/sec or 87.56mph)

A = 215 for the 450 and 600 for the 600

Cd = .05

Fd(450) = (1.2(87.56^2).05 * 215)/2 = 49450g/mm

Fd(600) = (1.2(87.56^2).05 * 600)/2 = 138001g/mm

BUT

The 600 paddles are 1.54 times heavier so with inertial dampening of the drag effect you get an effectual resistance of 89611g/mm

Ok, so first, please check my calculations and logic. If you have any questions, please ask.

Conclusion: Through this data we see that the flybar paddles will require the motors total work load to be increased by a factor similar to that of the initial 450 flybar paddle. For the stability, its worth it for me.

Yes, my initial estimate to the size increase was wrong, and some of my units might be wrong here, but since they are all relative to one another, the comparison between the paddles is correct by my logic. Hope to hear from you guys soon.
Yes but can you fly inverted circuits?

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03-24-2009 04:24 PM  8 years agoPost 25
odbo255

rrNovice

Granite Falls, WA -​US

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mounting 600 flybar paddles

ok, im really interested in this as a noob with a 450.

how would you put the 600 flybar paddles on a 450?

my buddy has both and says that the flybar is a different diameter

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03-24-2009 05:02 PM  8 years agoPost 26
Craig9080

rrApprentice

Holland, MA USA

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The flybar diameter doesnt matter since they are secured with a grub screw.

"I hover like a Pro"

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03-29-2009 06:22 AM  8 years agoPost 27
odbo255

rrNovice

Granite Falls, WA -​US

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600 paddles, i dont think so

myaces and i tried putting the 600 paddles on the 450 flybar today. neither of us can see how they could be safely secured by just using the grub screws, we both looked at it and the flybar diameter is just too small in comparison to the paddle threads.

maybe if you fill the threads with epoxy or jb weld, got your paddles set to your liking (cause you arent going to be moving them again!), tighten down the grub screws and let the epoxy cure overnight. maybe, maybe, it would be ok. of course you will have to cut the flybar to remove it, as the paddles aren't going to be coming off after putting epoxy in them.

as it was, i had the heavier "learner" paddles that are mentioned earlier in the thread on hand, so we put those on instead.

thanks for the help myaces!

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03-29-2009 06:37 AM  8 years agoPost 28
Mr Scout.

rrNovice

milpitas,ca,USA

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dudes right!,why would anyone mount a 600 paddles on a 450.hypotheically,lets just say you were able to mount it,then what?!.you cant really do too much cause the fly bar paddles are too damm heavy now and besides you can get a boom strke!.lol.

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03-29-2009 02:00 PM  8 years agoPost 29
bah7566

rrVeteran

Colorado

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I really want to see someone put 450 paddles on their 600. Come on, someone out there will try it.

I am a Heli addict!!!

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