RE: Official Aerobird Swift Thread  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> Electric Aircraft Universe >> Park Flyers & Backyard Flyers >> RE: Official Aerobird Swift Thread
Page: <<   < prev  29 30 31 [32] 33 34 35 36 37 38   next >   >>  

Login
Message << Older Topic   Newer Topic >>
RE: Official Aerobird Swift Thread - 1/24/2008 2:32:41 AM   
DaxFX



Posts: 693
Joined: 10/6/2007
From: San Juan, PUERTO RICO (USA)
Status: offline 		those feathers are made from a very cheap plastic board called D-Board use most on signs. I use them a lot in the work shop for creating signs. let me know your experience with that feathers. I have never try them because have lots of internal channels that wind can pass thru them. if bad setting can give more drag or maybe can acts like a elevators pushing plane up or down.

_____________________________

Sorry you need to play Tetris with my english !!
www.youtube.com/daxfx

(in reply to DaxFX)
       Post #: 776

RE: Official Aerobird Swift Thread - 1/26/2008 2:05:26 AM   
Swift427



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

Zeta30

I've already got a spare 36amp esc and RX so I just need to decide on a motor. I was thinking about this one

http://www.unitedhobbies.com/UNITEDHOBBIES/store/uh_viewItem.asp?idProduct=5203

Let us know what motor you decide on and how it works, I'll do the same.


Megas are too expensive. The ARC-28-37-4 for $50 looks similar to the one from UnitedHobbies. If you want the Swift to go ballistic go with the ARC-28-47-3 for $60. The specs for these motors are shown at http://www.lightflightrc.com/HTML/products/ARC-28-37-4.htm


_____________________________

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

(in reply to Zeta30)
       Post #: 777

RE: Official Aerobird Swift Thread - 1/26/2008 9:46:24 AM   
Zeta30



Posts: 230
Joined: 8/17/2007
From: Portland, OR, USA
Status: offline 		Thanks swift, that's a little too spendy for me though.

(in reply to Swift427)
       Post #: 778

RE: Official Aerobird Swift Thread - 1/26/2008 12:08:14 PM   
DaxFX



Posts: 693
Joined: 10/6/2007
From: San Juan, PUERTO RICO (USA)
Status: offline 		ok guys I think today is the Judgment Day on my Swift I am pcking up my stuf and head to the field with my Swift. I am praying to get a good day on my Swify but only God know what will going to happend.

i will post later what happend !! I hope that the new wing make the swift fly !

_____________________________

Sorry you need to play Tetris with my english !!
www.youtube.com/daxfx

(in reply to Zeta30)
       Post #: 779

RE: Official Aerobird Swift Thread - 1/26/2008 6:59:59 PM   
cbatters


 

Posts: 160
Joined: 7/19/2006
From: Stoughton, MA, USA
Status: offline 		IMHO - Many if not most of the problems flying the Swift are from flying too slow - largely due to reduced power output of the motor and battery iover time. Might be useful to have some minimum RPM posted here as a guide (I need to find the link to a free oscilloscope program that runs on a PC that can be used to check RPM via sound.)


Clint

(in reply to DaxFX)
       Post #: 780

RE: Official Aerobird Swift Thread - 1/26/2008 7:55:29 PM   
Swift427



Posts: 485
Joined: 3/15/2007
From: Minneapolis, MN, USA
Status: offline 		14,700rpm at 12volts = 17oz of thrust with stock motor and 6x4 prop
Only problem is that for $10.44 some motors are better than others. One pilot may get 30 flights with a conservative flying pattern and another pilot may only get 5 flights before frying the motor. At 12volts this long can brushed motor will last longer if a larger prop is gear driven like on the PZ warbirds and the HZ SuperCub.

This is the same brushed motor used in the Stryker 27B. However, PZ recommends & sells a 5x3 prop for use on the 27B when converting it to 3S Lipo power to reduce motor overheating.

Even though the Swift and Stryker weigh about the same one is a "lumber wagon" and the other is a sleek speed machine. Using a 5x3 prop on a Swift w/11.1v Lipo power doesn't offer the same advantage even though the smaller prop is turning more rpms.







< Message edited by Swift427 -- 1/26/2008 8:03:25 PM >

_____________________________

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

(in reply to cbatters)
       Post #: 781

RE: Official Aerobird Swift Thread - 1/27/2008 4:25:35 AM   
enufwind



Posts: 22
Joined: 6/28/2005
From: Denver, CO, USA
Status: offline 		I expect Hobbyzone or Parkzone will introduce a replacement to the Swift in the next coming years. When it's all working well add some X-Port modules. www.TheXPortZone.com

(in reply to DaxFX)
       Post #: 782

RE: Official Aerobird Swift Thread - 1/27/2008 8:35:46 PM   
Swift427



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

Zeta30,
Let us know what motor you decide on and how it works, I'll do the same.


Anyone, anywhere have an Align 450 Turbo that's slightly used in good condition.
http://www.aero-fever.net/product_info.php?cPath=5_13&products_id=46

Even this more excellent brushed motor weighing 2.96oz isn't designed for use direct drive with a 6x4 prop. According to the specs any prop larger than 5x3 should use a 4:1 gear reduction ...
http://www.align.com.tw/html/ch/al200/al200-8.html

This is why the HZ SuperCub and PZ warbirds (same motor as Swift) with their larger prop and gear reduction can be converted to 11.1v lipo without frying the motor after a few flights.

So I've got to believe that Hobby-Lobby's direct drive 12v specs using a 6x4 prop on the stock Swift motor are in ERROR. That also explains why PZ recommends/supplies a replacement 5x3 prop for those that convert the Stryker 27B to 3S Lipo (identical brushed motor as Swift). The Swift is not the sleek speed machine as the Stryker so converting the Swift to 3S Lipo and using a 5x3 prop still wouldn't provide enough thrust to significantly satisfy the aerobatic maneuvering of an intermediate pilot. Plus the difference in aerogynamic drag between the Swift and Stryker would mean that the Swift's stock motor would still tend to overheat even with a smaller 5x3 prop and an aggressive aerobatic flying pattern.

My two cents on another brushed motor option (Permax 450 Turbo) to follow ...


_____________________________

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

(in reply to Zeta30)
       Post #: 783

RE: Official Aerobird Swift Thread - 1/28/2008 12:02:33 AM   
Swift427



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

Zeta30,

Let us know what motor you decide on and how it works, I'll do the same.


I'm buying a used Multiplex Permax 450 Turbo (4.9oz) w/18amp Jeti brushed ESC. This motor can still be purchased new at RCHobbies for $35 (power output similar to 540 can motor in Aerobird Xtreme -- cheaper route than b/less conversion).
http://www.rchobbiesandmore.com/product.php?productid=23021

Motorcal1 rates it at 2,189 rpms/volt and 1.2 amps/volt. This is the only 28-29mm diameter brushed motor I know of that won't overheat and fry with a 3S Lipo battery spinning a 6x4 prop fast enough to generate at least 20oz of thrust . Motor weighs 1.2oz more than the Swift motor. CG may be OK IF Swift is indeed too nose heavy as aeajr and others have implied. CG can be adjusted by weight & position of battery in canopy as aeajr and others have mentioned.

NOTE: When a plane is underpowered it can behave as if it is TOO nose heavy, but with adequate power it really isn't too nose heavy.

The following is from the MultiplexCalc using a fully charged 3S 2000mAh Lipo spinning an APC 6x4 prop on an Aerobird Swift.
18.37 Motor Amps.
15,693 Prop RPM
26.5 Prop Static Thrust oz
59.4 Prop Pitch Speed mph
8:25 Minutes at Full-throttle
120 Watts Out (67% efficiency)

The following is an approximate comparison with the Challenger's stock 380 using a fully charge 7-cell(8.4v) 1000mAh NiMH.
7.5 Motor Amps
10,700 Prop RPM
9.7 Prop Static Thrust oz
40.5 Prop Pitch Speed mph
8.25 Minutes at Full-throttle
32 Watts Out (52% efficiency)


< Message edited by Swift427 -- 1/28/2008 8:46:56 PM >

_____________________________

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

(in reply to Zeta30)
       Post #: 784

RE: Official Aerobird Swift Thread - 1/29/2008 1:44:09 AM   
r72cnvt


 

Posts: 60
Joined: 10/30/2007
From: Spokane Valley, WA, USA
Status: offline 		Swift427
I've done the Challenger/Swift prop test in actual use. Back to back runs. The Challenger prop makes it climb much better, but at the expense of a lot of speed. It will hand launch great, but the slow speed makes it a boring plane to fly. Just my $.02.

_____________________________

It takes longer to do it twice than to do it right the first time!

(in reply to Swift427)
       Post #: 785

RE: Official Aerobird Swift Thread - 1/29/2008 5:09:52 PM   
DaxFX



Posts: 693
Joined: 10/6/2007
From: San Juan, PUERTO RICO (USA)
Status: offline
quote:

ORIGINAL: r72cnvt

Swift427
I've done the Challenger/Swift prop test in actual use. Back to back runs. The Challenger prop makes it climb much better, but at the expense of a lot of speed. It will hand launch great, but the slow speed makes it a boring plane to fly. Just my $.02.


that is an exellent news for me. so with challenger prop will fly better at low speed. thats means no wing stall at low speed? I dont care about going too fast since I flew most in a small baseball leage field. in fact I prefer have her fly slower. but since swift dont fly slow I never use it.

at least can do rolls and loops? if yes I will go get the prop right now !

_____________________________

Sorry you need to play Tetris with my english !!
www.youtube.com/daxfx

(in reply to r72cnvt)
       Post #: 786

RE: Official Aerobird Swift Thread - 1/31/2008 3:00:00 AM   
Swift427



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

ORIGINAL: r72cnvt

Swift427
I've done the Challenger/Swift prop test in actual use. Back to back runs. The Challenger prop makes it climb much better, but at the expense of a lot of speed. It will hand launch great, but the slow speed makes it a boring plane to fly. Just my $.02.

I compared the Challenger 6.5x3 prop to the Swift 6x4 prop last May.
I thought the 6.5x3 seemed to have a slight advantage in thrust, while the 6x4 has slight advantage in speed, but checkout the following links. Need to use same battery fully charged for each run to get a fair comparison. The difference in prop size, prop static thrust, prop pitch speed, motor, battery, amps, watts, motor rpms, efficiency, etc can be compared at:
http://brantuas.com/ezcalc/multiplexcalc.asp
In fact the 6x4 has 0.7oz more thrust than the 6.5x3 on either a 7 or 8 cell NiMH. An 8 cell NiMH generates 2oz more thrust than a 7 cell NiMH.

Prop Load Factor (PLF) between 6.5x3 of 824 and 6x4 of 864 doesn’t have that much of an affect on motor rpms and prop static thrust
http://www.ampaviators.com/index.php?option=com_content&task=view&id=51&Itemid=42

_____________________________

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

(in reply to r72cnvt)
       Post #: 787

RE: Official Aerobird Swift Thread - 2/1/2008 12:49:18 AM   
cblandin


 

Posts: 17
Joined: 12/15/2006
From: , TX, USA
Status: offline 		Haven't invested any more effort into my swift (even though it "only" needs a new motor at this point)...decided to get a Mini Ultra Stick - these two planes aren't even in the same league. The MUS flys like the bigger flow powered sticks (i.e. we also have a Big Stick 40 with an OS .46X on it), but I can fly it out of a local "lot" instead of having to cart it to the field 40 minutes away. I bought it used to minimize my investment. I managed to trash it (pilot error - note to self, you cannot see thru trees), but $6 worth of balsa wood and some left over monokote had it in the air again (note: took a few hours though). I'm still tempted to fix the swift, but it's almost a case of not really wanting to bother at this point...

(in reply to Swift427)
       Post #: 788

RE: Official Aerobird Swift Thread - 2/1/2008 5:25:42 PM   
Swift427



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

friedclutch 6/12/07 – Official Aerobird Swift - thread
Hey guys.... Chiming in here on the Swift. I have a Stryker C and a Swift. (And a buncha gas planes) I'm a very experienced RC pilot. I got the swift for a relaxing fly. It flys ok and does pretty much as I expected aside from being low on power.


quote:

friedclutch â€