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RE: Official Aerobird Swift Thread - 4/21/2008 2:25:18 AM   
The_Mongrel



Posts: 2654
Joined: 9/19/2007
From: Murrumbateman, AUSTRALIA
Status: online
quote:

ORIGINAL: Zeta30

I would say that at half throttle I am going a little faster than WOT on the stock set up. I can't really estimate MPH, But 1/2 throttle is about the same speed as WOT on my Parkzone Trojan T-28, which would probably mean noting to you unless you've flown one.

The tail feathers are much stiffer than the original ones. They are about 1 1/2 times as thick though.

I know the Swift wasn't really built to be a speedster. I can live with it for now.

The plane does track well. I can get it up and flying level with very minimal trim adjustment.

I have to say that I really love the sound of the motor when I do give it full throttle.



Well maybe it is just something that you have to live with. If it is flying well now, and that is the only issue... then I would enjoy while you can.

Cheers
-J

_____________________________

Crashing is such sweet sorrow!

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       Post #: 876

RE: Official Aerobird Swift Thread - 4/21/2008 11:48:25 PM   
Swift427



Posts: 485
Joined: 3/15/2007
From: Minneapolis, MN, USA
Status: offline
quote:

I now have a different problem though. At very high speeds the plane develops a major shake to it I would say it's more than a vibration. It's as if someone is holding the plane and shaking it up and down. Slow the plane down and this goes away.

Planes not designed for speed start to vibrate and shake just before they break the speed of sound. If you go full throttle so as to penetrate Mach One it will either break into a million pieces or fly smooth as chocolate cream. My guess would be ..........a .................. ah ..................... ahhh ......................... I give up!


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Never Give Up, Never Slow Down, Never Grow Old, and Never Ever Die Young

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       Post #: 877

RE: Official Aerobird Swift Thread - 4/22/2008 12:19:26 AM   
Swift427



Posts: 485
Joined: 3/15/2007
From: Minneapolis, MN, USA
Status: offline
quote:

I think I got about 6-8 flights on the brushed motor before burning it up. I burned up 3 brushed motors with LiPos. (2 on my HZ Super Cub and the one on my Swift).


Do you know of anybody else that has burned up their SuperCub motor after converting to LiPo?

Does it or does it not use the same 480 motor as the Swift. According to the manufacturer specs it draws only 8 amps / 103 watts at 12v swinging a 11x7 prop resulting in 20oz of thrust with a 4:1 gear ratio. The SuperCub weighs about 24 ounces with LiPo.

The same motor draws 14 amps / 171 watts at 12v swinging a 6x4 prop resulting in 17 oz of thrust direct drive. The Swift weighs about 22 ounces with LiPo.

Hard to believe that both of your SC motors were duds. Does any one else know of someone that has burned out a SC motor after converting to LiPo???

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Never Give Up, Never Slow Down, Never Grow Old, and Never Ever Die Young

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       Post #: 878

RE: Official Aerobird Swift Thread - 4/22/2008 1:19:14 AM   
Zeta30



Posts: 230
Joined: 8/17/2007
From: Portland, OR, USA
Status: offline 		I thnk the motors are the same.

I have read plenty of posts from people saying they fly those brushed motors WOT with the 3S LiPo batteries and they have never burned any up so I don't know. I think I am in the minority of people reporting that they have burned up their brushed motors.

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       Post #: 879

RE: Official Aerobird Swift Thread - 4/22/2008 2:21:59 AM   
stanman242


 

Posts: 7
Joined: 5/20/2007
From: , VA, USA
Status: offline
quote:

ORIGINAL: Zeta30

I now have a different problem though. At very high speeds the plane develops a major shake to it I would say it's more than a vibration. It's as if someone is holding the plane and shaking it up and down. Slow the plane down and this goes away.


I had a swift that I put a Permax BL-400/8D inrunner in and had a similar vibration problem.
I found that if I pressed in on the sides of the fuse near the front of the motor it stopped.

The motor only being mounted by two screws was allowed to vibrate due to flexing of the housing.
I did a plastic tie-wrap mod that stopped it.

I did not use the wrap in front of the motor like most people do but rather poked two slots with a heated
pocket screwdriver so that the tie would go around the motor and squeeze the sides of the housing to
keep it from flexing.
Pic is a new housing with marks aprox where I ran the tie.
It stopped my vibes.

Attachments
Click to see fullsize image.
Click for fullsize

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       Post #: 880

RE: Official Aerobird Swift Thread - 4/22/2008 3:07:57 AM   
Zeta30



Posts: 230
Joined: 8/17/2007
From: Portland, OR, USA
Status: offline 		That is an easy fix. I'll give it a try.

(in reply to stanman242)
       Post #: 881

RE: Official Aerobird Swift Thread - 4/22/2008 4:27:19 AM   
stanman242


 

Posts: 7
Joined: 5/20/2007
From: , VA, USA
Status: offline 		Before you go to the trouble, try gripping firmly with hand and see if it stops vibration at wot.

I don't want you to spend two hours fishing the stupid tie-wrap through the holes and it not do any good!

(in reply to Zeta30)
       Post #: 882

RE: Official Aerobird Swift Thread - 4/22/2008 7:03:13 PM   
Swift427



Posts: 485
Joined: 3/15/2007
From: Minneapolis, MN, USA
Status: offline
quote:

That is an easy fix. I'll give it a try.




I thought all of us Swift DieHards learned this way, way, way back at the dawn of Swift101 from Aeajr and others.
It's the first mod every 'level-headed tinkering addict' (is that a contradiction of terms) does to their Swift RTF.

And if it's that important on a Swift RTF its mathematically twice as important on a brushed 480 that's been
converted to LiPo, and 2x2x2 as important on a brushless/lipo Swift with a MachOne powerplant.

How are you going to solve the wing flapping problem. There's a limit to how many warts duct tape can remove.
Or maybe, NOT, and then again aren't real wings suppose to flap.

Oh, almost forgot You need to go to HomeDepot or whoever to pay more money than necessary for a
multicolored 100+count package of 50lb test tie straps so you can use just one yellow tie strap that perfectly matches the yellow fuselage. Well, I'll take back just 1 as you break the first one to determine how tight you can squeeze the tie wrap tool before the tie wrap breaks. Then on the second one you apply as much force as possible
without breaking the tie to make sure that big-beautiful BrushlessBrute won't Shake Rattle or Roll.

It's also advisable being that you have extra tie wraps to use two (another one toward front of cowl recess)
especially with a MachOne setup. Was that loud ear deafening sound I just heard what I think it was?
340.29 m/s and still Going, Going, ... Gone

< Message edited by Swift427 -- 4/22/2008 9:31:25 PM >

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Never Give Up, Never Slow Down, Never Grow Old, and Never Ever Die Young

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       Post #: 883

RE: Official Aerobird Swift Thread - 4/26/2008 6:12:59 PM   
Zeta30



Posts: 230
Joined: 8/17/2007
From: Portland, OR, USA
Status: offline 		I tried the plastice tie and did not solve my vibration problem. On closer inpection of one of my wings I found a large crack that goes all the way from the front of the wing to the yellow plastic that covers the servos. I will try gluing that and see if that is the cause.

I have to think what I'm going to do if it doesn't, I was kind of hoping on making my Swift a speed demon but I don't wnat to put much more money in to it.

I've been thinking about building a Stryker and I think the motor I have in the Swift would be an awesome motor for that project.

(in reply to Swift427)
       Post #: 884

RE: Official Aerobird Swift Thread - 4/27/2008 10:25:32 PM   
Zeta30



Posts: 230
Joined: 8/17/2007
From: Portland, OR, USA
Status: offline 		I through with the Swift. (this time I mean it).

I did some wing repair concerning my last post and flew it again today to see if that took care of my shuddering problem. I got the plane up to speed and still no go. Actually it seems to be getting worse. to make it even worse it shuddered so bad that I crashed it nose first in to the ground. Broke the rod that holds the tail feathers, one of the wings and the body now looks like an accordion.

I figure I can spend $45 for a new fuselage and tail feathers or use that money to start buying the parts for a Stryker. I think I will do the latter.

I do have to say that adding the brushless motor is probably the best upgrade someone can do to this Albatross but I never had much fun flying it so I'm moving on to my next plane.

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       Post #: 885

RE: Official Aerobird Swift Thread - 4/28/2008 1:25:46 AM   
The_Mongrel



Posts: 2654
Joined: 9/19/2007
From: Murrumbateman, AUSTRALIA
Status: online
quote:

ORIGINAL: Zeta30

I through with the Swift. (this time I mean it).

I did some wing repair concerning my last post and flew it again today to see if that took care of my shuddering problem. I got the plane up to speed and still no go. Actually it seems to be getting worse. to make it even worse it shuddered so bad that I crashed it nose first in to the ground. Broke the rod that holds the tail feathers, one of the wings and the body now looks like an accordion.

I figure I can spend $45 for a new fuselage and tail feathers or use that money to start buying the parts for a Stryker. I think I will do the latter.

I do have to say that adding the brushless motor is probably the best upgrade someone can do to this Albatross but I never had much fun flying it so I'm moving on to my next plane.


Hi Zeta,

Sorry to hear about that - But like most... you have now seen the light and it is time to leave the Swift behind and go and fly a real plane!!

Cheers
-J

_____________________________

Crashing is such sweet sorrow!

(in reply to Zeta30)
       Post #: 886

RE: Official Aerobird Swift Thread - 4/28/2008 1:57:31 AM   
Zeta30



Posts: 230
Joined: 8/17/2007
From: Portland, OR, USA
Status: offline 		DOH!!!

I was salvaging the parts from the Swift and the crash bent the shaft on my motor, ARRGHH!!

Oh well, at least it was an inexpensive motor.

(in reply to The_Mongrel)
       Post #: 887

RE: Official Aerobird Swift Thread - 4/29/2008 1:45:02 AM   
Swift427



Posts: 485
Joined: 3/15/2007
From: Minneapolis, MN, USA
Status: offline
quote:

ORIGINAL: Zeta30

DOH!!!

I was salvaging the parts from the Swift and the crash bent the shaft on my motor, ARRGHH!!

Oh well, at least it was an inexpensive motor.


I'm trying to figure out how an inrunner prop shaft on a pusher plane gets bent? I take it you wouldn't recommend someone buying this motor as a replacement for the brushed long can 400 (Swift 480) http://www.unitedhobbies.com/UNITEDHOBBIES/store/uh_viewItem.asp?idProduct=5203

It sounds like the extra cost of this one is a better investment? -
quote:

The ARC-28-37-4 for $50 looks similar to the one from UnitedHobbies. http://www.lightflightrc.com/HTML/products/ARC-28-37-4.htm


Having given the Swift your best effort what inrunner would you now recommend for aileron training and moderate aerobatic flying.



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Never Give Up, Never Slow Down, Never Grow Old, and Never Ever Die Young

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       Post #: 888

RE: Official Aerobird Swift Thread - 4/29/2008 2:16:54 AM   
tam popo