RE: Official Aerobird Swift Thread

RE: Official Aerobird Swift Thread
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RE: Official Aerobird Swift Thread - 12/30/2007 10:48:02 PM

The_Mongrel

Posts: 2653
Joined: 9/19/2007
From: Murrumbateman, AUSTRALIA
Status: offline

OOOhhh! She looks as ugly as my battered bird!

I just swapped out the fuse yesterday. I am sorry to ask stupid questions of you, but do you understand the meaning of 1C? I am just curious as to why your batteries take so long to charge. 1C on a 2200mah battery is 2.2Amp. Now considering that the battery will still be reading above 9Volts, it should not take that long to stick the last 4 Volts back in the battery and 2.2Amp. If you look at the maths...

2.2Amp = 2200mah
Charging at this rate will take 1 hour to put all 2200mah back in the battery - but that is from dead flat. We don't run dead flat so it should be a bit under this.

Now if you do what I do and charge my 2200mah batteries at 3A, they charge even quicker.

Cheers mate.
-J

_____________________________

Crashing is such sweet sorrow!

(in reply to cblandin)

Post #: 701

RE: Official Aerobird Swift Thread - 12/31/2007 12:11:50 AM

cblandin

Posts: 17
Joined: 12/15/2006
From: , TX, USA
Status: offline

quote:

ORIGINAL: The_Mongrel

OOOhhh! She looks as ugly as my battered bird!

I just swapped out the fuse yesterday. I am sorry to ask stupid questions of you, but do you understand the meaning of 1C? I am just curious as to why your batteries take so long to charge. 1C on a 2200mah battery is 2.2Amp. Now considering that the battery will still be reading above 9Volts, it should not take that long to stick the last 4 Volts back in the battery and 2.2Amp. If you look at the maths...

2.2Amp = 2200mah
Charging at this rate will take 1 hour to put all 2200mah back in the battery - but that is from dead flat. We don't run dead flat so it should be a bit under this.

Now if you do what I do and charge my 2200mah batteries at 3A, they charge even quicker.

Cheers mate.
-J

Mongrel,

Actually, I'm not 100% on the whole mah vs. volts thing, but I don't think zero volts equals zero milliamps. The way I understand it the lowest safe voltage for a 3 cell lipo is about 8.4 volts. At that voltage I think the pack (regardless of milliamp capacity) is essentially depleted (or pretty dang close). For my 1300mah pack I charge at 1.3 amps (i.e. 1C), and for my 2000 mah pack I charge at 2.0 amps (i.e. 1C). If I run a pack all the way down to the ESC's lipo cutoff it seems like it is almost fully depleted from a mah perspective. You are right though, my 1300 mah pack seems to "fill" at about 1100 mah implying it still had a 200 mah reserve or so...still, that's generally about an hour because it starts to trickle as it gets right on top of the 12.6v mark. Now, I could push them above 1C as you are doign and substantially reduce the charge time.

Now, on to my next dilemma. I put the new tail feathers on and had a great flight this afternoon, but after several minutes she nose-dived in and now the motor won't run (tried two seperate batteries). The servos all move, but I get nothing from the motor. Now, this is the original stock brushed motor and I have run more than one full throttle lipo pack thru it (anf this was my longest flight yet with the new 2000 mah lipo...but part throttle most of the time). It's either the ESC (a GWS unit) or the motor...any thoughts?

Thanks!

(in reply to The_Mongrel)

Post #: 702

RE: Official Aerobird Swift Thread - 12/31/2007 12:49:10 AM

The_Mongrel

Posts: 2653
Joined: 9/19/2007
From: Murrumbateman, AUSTRALIA
Status: offline

Hey Mate,

Sorry to hear about the crash.

If you get servos and no motor it could be that the ESC has crapped it! The ESC is actually split into tow areas... ESC (Electronic Speed Controller) for the motor and BEC (Battery Elimination Circuit) for the servos. It could be that the BEC is OK, but the ESC is fubar! You may have cooked it.

I always run a higher ESC than I need, mainly because the BECs are better rated.

eg: I have a 20A ESC that only has a 1A BEC... but the 25A ESC has a 2A BEC. You can test the motor by putting it across 6 to 10v - it should spin. You wont hurt it.

Good luck.

Cheers
-J

_____________________________

Crashing is such sweet sorrow!

(in reply to cblandin)

Post #: 703

RE: Official Aerobird Swift Thread - 12/31/2007 2:58:23 PM

DaxFX

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

maidei maidei maidi.. huston we got problem. you copy huston. we got pr............ BOOOOM.. wow I crash .

I crash today 2 planes and my neighbor 1. today was a bad day. first I take my little phantom to the air I was flying inverted to ;ow and since no aileron I can not recover at so much low altitud. kaboom. first crash of the day tail wing bent and main wing have a dent from the propeller. 2nd crash. and 1 of the best my friend had a flyzone Sky something. is like the swift but normal tail no aileron and high wing. that thing is cool very fast on 7 cell. my friend was like 500 of altitud ( the fact is I dont know the altitud I just know was a little dot in the sky) he start to bring she down back but instead of going down in circle just the way I do , he go very far and start going down straight to us. that f u k c ing thing was going down super fast. I was looking at the plane and notice that the lights of the park are in the way of the plane. did the pilot see it ???? BBBBOOOOOOOOOMMMMMMMMMMMMMMMMMM. not he dont see it. just the sound if the impact bring out all the people near the park . the plane was in 100 parts and the battery travel 1/2 the field but without a plane.

after laugh 1 hour was my turn, I take my swift. and go up at the moment she take off start drop leftt wign down I correct and do again. it was like trimed to the left. I land and check everithing. trim on tx was centered trims on servo horns and flap arms are perfect, the throw of the ailerons was same in both side. so why ir rolling to the left. I think was the wind since all looks normal. and takeoff again. this time doing the same at the pont I went to a wing stall I apply up in elevator and she went a little crazy and I hit the fence of the park . I brack appart one wing and bent the other . the canopy cover lost the little rod that hold it close. battery plug still missing.

I just need to know what was causing the plane to drop left wing and not want to turn right. all wel trimmed

< Message edited by DaxFX -- 12/31/2007 3:01:56 PM >

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Post #: 704

RE: Official Aerobird Swift Thread - 1/3/2008 2:19:58 AM

cbatters

Posts: 160
Joined: 7/19/2006
From: Stoughton, MA, USA
Status: offline

1. Check for proper,elevator operation and alignmnet. lack of symetry in the tail will cause plane to roll.

2. Lack of air speed will cause swift to roll and crash - not responding to control inputs.

3. Don't be afraid to use the electronic trims to compensate for roll if you are 100% sure you have enough air speed.

Clint

(in reply to DaxFX)

Post #: 705

RE: Official Aerobird Swift Thread - 1/3/2008 3:12:58 AM

DaxFX

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

quote:

ORIGINAL: cbatters

1. Check for proper,elevator operation and alignmnet. lack of symetry in the tail will cause plane to roll.

2. Lack of air speed will cause swift to roll and crash - not responding to control inputs.

3. Don't be afraid to use the electronic trims to compensate for roll if you are 100% sure you have enough air speed.

Clint

everithing trim correctly. tail pefect simetrical trimed. servo throw is same on both wings. and keep rolling to the left and almost dont respond to right very wierd. if is was bad triming at least will respond to right. but is rolling very slow to the right and super fast to left. just krazy issue. everithing looks perfect I dont understand .....

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Sorry you need to play Tetris with my english !!
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Post #: 706

RE: Official Aerobird Swift Thread - 1/3/2008 2:33:48 PM

Zeta30

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

Have you checked the horns on the ailerons? Before I replaced mine they would come loose after a hard lading and especially after a crash. they will still look like they function correctly on the ground but they would be a little loose. Press down on the clips to make sure they are good and tight on the ailerons.

(in reply to DaxFX)

Post #: 707

RE: Official Aerobird Swift Thread - 1/3/2008 2:42:05 PM

DaxFX

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

if that was the case . does not matter now becaus since the last ccrash it have new wings now, but that is the only thing that make sence for what was happening and the only thing I dont check, thanks foe the tip i will pay attention on that in future crashes. once happend to rudder on my super cub just dont know why I dont think in that. lol I am almost sure that was the problem.

now wait again for a perfect day to fly again. !!

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

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Post #: 708

RE: Official Aerobird Swift Thread - 1/4/2008 4:58:36 AM

mx-pigg

Posts: 1
Joined: 12/24/2007
From: Lake Elsinore, CA, USA
Status: offline

I see quite a few comments in many different forums stating that the swift rolls even when trimmed. I had the same problem until I discovered the main wing was not perfectly aligned perpendicular to the fuselage. It's hard to notice with the naked eye. I was able to see this when I laid my bird on my tile floor and used the tiles to gauge the wing alignment.

Once I found the problem, I separated the wings and noticed my wires were pinching on one side and causing some misalignment (ouch). After fixing this, the wings were still misaligned from my maiden flight crash so I shimmed it with a small, thin piece of cardboard.

The swift flies very straight now. I'm glad I bought this as my first RC, excellent fun out of the box.

(in reply to DaxFX)

Post #: 709

RE: Official Aerobird Swift Thread - 1/4/2008 1:15:32 PM

DaxFX

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

I just still whant to know what was happening with mi SWFT and I go to the garbage to check the damage wings. arms on ailerons are tight. SO that was NOT the problem

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Post #: 710

RE: Official Aerobird Swift Thread - 1/4/2008 1:50:07 PM

The_Mongrel

Posts: 2653
Joined: 9/19/2007
From: Murrumbateman, AUSTRALIA
Status: offline

Dax,

I had a similar problem when I changed my wings... in the end I gave up and put up with it!

_____________________________

Crashing is such sweet sorrow!

(in reply to DaxFX)

Post #: 711

RE: Official Aerobird Swift Thread - 1/4/2008 2:16:42 PM

DaxFX

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

wow . I almost dismount the swift to make another one or made a swift with rudder and before I do that I flew for last time and was exellent have the problem but I think was bad triming since that fly was my only almost succesfully flew. i decide to keep the swift since i do lots of fun (read back) on that flew. next morning i check everithing all triming good all looks perfect pre flight test pass a+ and lift of from ground. getting speed an altitud. sudenly i wing start drop i recover and drop again, I was at the point that have to be complete right input on aileron stick to fly straight if I let out the stick plane enter in a roll again to left. i input right again and slowly recover .. that is what I mean when say toll faster to right. I was able to land hard one but safe no damage. I re-check everytihing all triming centeredn in tx all flaps centered in all wings high and low throw working good. I lift again and start do same ending in the fence with both wings damage and few scratch here and there.

can I cry ! what I am doing wrong.

_____________________________

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

(in reply to The_Mongrel)

Post #: 712

RE: Official Aerobird Swift Thread - 1/5/2008 1:48:26 AM

Zeta30

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

I feel your pain Dax!! I wish I had an answer for you but I don't. I am going to give my Swift one more chance, but I'm not spending any more money on it. I now have a modded HobbyZone Super Cub with brushless motor and ailerons, and just got a Parkzone T-28 Trojan for Christmas which is waaay easier to fly than the Swift, and a super blast by the way.

So if I can't get the Swift to fly I doubt if I will put any more effort in to it.

(in reply to DaxFX)

Post #: 713

RE: Official Aerobird Swift Thread - 1/5/2008 2:21:50 AM

The_Mongrel