RE: WALKERA 37

RE: WALKERA 37
View related threads: (in this forum | in all forums)

Logged in as Guest

Users viewing this topic: none

Printable Version

Ikarus ECO 8 - EP - ARF
Seller: gilweiss
Details: $400.00 | 7/5/2008 | Classified Ad
We will rotate YOUR AD in this spot if you select "Forum Featured" when placing or editing your ad!

All Forums >> RC Helicopters >> Electric RC Helis >> Walkera Helis - Dragonfly, etc.. >> RE: WALKERA 37

Page: << < prev 7 8 [9] 10 11 12 13 14 15 16 next > >>

Login

Message

<< Older Topic Newer Topic >>

RE: WALKERA 37 - 7/5/2006 4:32:10 AM

MikeU

Posts: 7
Joined: 6/24/2006
From: Laguna Hills, CA, USA
Status: offline

Heliwannabe,

Mine did come with the 400 motor and the green 12v 650 mAH battery.

I will be investing in a 1800 lipo when I get an ammo holder to charge and store the battery. After seeing the videos from Utah Flyer's I am going to be cautious with the lipo. Don't want one to catch fire and burn down the house. I know they went overboard with the charging demonstration, but better to be cautious than sorry.

I have adjusted the main blades but not sure if they are too high now. I had to adjust by two turns to lengthen the control on the blue blade. Maybe I need to buy the pitch guide.

Happy 4th to all,
Mike

(in reply to Heliwannabe)

Post #: 201

RE: WALKERA 37 - 7/5/2006 6:14:57 AM

MikeU

Posts: 7
Joined: 6/24/2006
From: Laguna Hills, CA, USA
Status: offline

I want to purchase the 11.1v 1800 maH 3-cell lipo. What discharge rate should I buy 10C or 12C? I will also need to buy the proper charger for the lipo.

Does anyone have an on-line reseller they like to puchase from or an eBay seller? I would like to buy the battery and charger from the same place.

Thanks,
Mike

(in reply to MikeU)

Post #: 202

RE: WALKERA 37 - 7/5/2006 12:34:01 PM

armycopter

Posts: 616
Joined: 2/10/2006
From: Biddeford, ME, USA
Status: offline

Hi Mike,

I have the following charger

http://www.align.com.tw/shop/product_info.php?cPath=22_34&products_id=201

You can get it from many different places, they run about $50. Just google it for the best price. The nice thing about this charger is that it will balance all three cells and also plug directly into a wall outlet. I don't charge in the field so I never wanted a charger to connect to a car battery. This one works great, however, mine usually requires a small household fan to be running on it to keep the circuits cool. I don't think they vented the casing enough (nothing happens if it gets too hot, except that it will not charge). My batteries never even get warm during charging and I am completely comfortable with this setup. This charger stops charging when peak power is reached.

I have both 10C and 12C lipos. Both work great. Both are 1800mAh at 11.1V. The 12C stays cooler after use for some reason, I'm not sure why. Both give me long flight times (I've gotten close to 1/2 hour before). This is where I got my 12C

http://cgi.ebay.com/Li-Poly-11-1v-12C-1800mAh-3-Cells-Rechargeable-Battery_W0QQitemZ6051420906QQihZ009QQcategoryZ34056QQtcZphotoQQcmdZViewItem

Take care

(in reply to MikeU)

Post #: 203

RE: WALKERA 37 - 7/6/2006 3:30:11 AM

Heliwannabe

Posts: 58
Joined: 3/30/2006
From: Scottsdale, AZ, USA
Status: offline

I might be living a bit dangerosuly but I have been charging mine through the output port with a current and voltage lab quality power supply (series charging). I set the current limit at 1 amp and the voltage limit at 12.60 volts (4.2 per cell X 3) and monitor the individual cell voltage to make sure they are coming up equally. So far they have come up and tapered off perfectly, never more that .01 volt split per cell. This probably works because the battery is new so I do have an equalizing charger on order.

That being said "TAKE ARMYS ADVICE AND GET THE PROPER CHARGER". It will monitor and charge each cell individually to keep you out of trouble. The other issue is to not over discharge them our you will damage the battery. They say 3.2 v per cell minimum and no less than 3 volts per cell (9 volts for the 3 cell pack) under a load. My experience with four discharges cycles under my belt is the second you start to notice a loss of power your are dangerously close to the end of the minimum discharge cycle. I let it go this far once and tested each cell and had 3.21, 3.18 and 3.17 respectvely (no load) eek. Fortunately thay came back perfectly and equally on the next charge.

The pack usually come almost fully charged so pay attention on that first charge as it may be short. Mine stays perfectly cool on the charge cycle as well, and is just barely warm after and high discharge.

With a little common sense I really think the danger part is overstated and the amount of power these things deliver is incredible. The 1800 mAH is lighter than the stock battery and delivers roughly three times the power (or run time). With is low internal resistance you will see a considerable increase in motor power because the voltage under load does not drop off as much as with the nicad pack. Hence my hot motor issue (see previous posts). Yes I do have a burshless motor and ESC on order.

Sorry that may be way too much information but I cycle nicad batteries on a daily basis at work (aircraft emergency batteries) and I am really impressed with the lipos.

Jim

(in reply to MikeU)

Post #: 204

RE: WALKERA 37 - 7/6/2006 9:59:32 AM

balance_mind

Posts: 209
Joined: 6/15/2006
From: --, SINGAPORE
Status: offline

Also planned to move forward after the DF04.

Any ideal which is better? DF37 or DF60?

So far the posts here have move positive comments than the DF60. However, DF60 posts were alot more.

(in reply to Heliwannabe)

Post #: 205

RE: WALKERA 37 - 7/6/2006 12:29:27 PM

armycopter

Posts: 616
Joined: 2/10/2006
From: Biddeford, ME, USA
Status: offline

I think it's all personal preference, however, it looks like the metal mainframe of the 60 causes serious glitches. From what I've read in the 60 thread, most people HAVE to upgrade the TX/RX (another $200). My 37 has been pretty much glitch free (knock on wood), although I am replacing the servo's today because of something that happened on my DF4 (they use the same servo's).

quote:

ORIGINAL: balance_mind

Also planned to move forward after the DF04.

Any ideal which is better? DF37 or DF60?

So far the posts here have move positive comments than the DF60. However, DF60 posts were alot more.

(in reply to balance_mind)

Post #: 206

RE: WALKERA 37 - 7/6/2006 11:54:32 PM

armycopter

Posts: 616
Joined: 2/10/2006
From: Biddeford, ME, USA
Status: offline

Just ordered 4 hitec HS-55 servo's for my 37. Decided to replace all four when I realized the stock servos were the same as my DF4. My DF4 had both servo's freeze up and die. Luckily it was on the ground. I didn't want that to happen to my 37 while in flight. I think my wife is going to shoot me tonight so this may be my last post... another $60...

By the way hobbypeople is having a $10 off sale if you spend $25. I got 4 servo's for about $46, which seemed pretty reasonable.

(in reply to armycopter)

Post #: 207

RE: WALKERA 37 - 7/7/2006 3:34:45 AM

balance_mind

Posts: 209
Joined: 6/15/2006
From: --, SINGAPORE
Status: offline

I have changed my DF04 servos the 2nd day it arrives. Totally crapy. They just stuck after a few directional checks.
Although they have replaced with towerpro servos, but they aren't good. They still glitch. Have tried Supertech and looks good.

The flow of posts for DF37 seems to slow down. Does that mean not many are having this machine? Or no problems? Or still observing on their machines?

(in reply to armycopter)

Post #: 208

RE: WALKERA 37 - 7/7/2006 5:25:44 AM

MikeU

Posts: 7
Joined: 6/24/2006
From: Laguna Hills, CA, USA
Status: offline

Today I ordered a Lipo 1800, Lipo Charger, Align 430L Brushless Motor, Align 25A ESC and Align Metal tail Servo Brackets for my DF37. I should have them sometime next week. I can't wait.

Army, What part number did you order for the DF36 tail servo control rod? Once I move the servo to the tail I would like to use the shorter DF36 control rod.

I adjusted the length on the tail servo rod today to try and stop the heli from turning left. But once I move the servo I have to re-adjust.

I will update once I get all the parts.

Thanks,
Mike

(in reply to Heliwannabe)

Post #: 209

RE: WALKERA 37 - 7/8/2006 3:05:34 AM

armycopter

Posts: 616
Joined: 2/10/2006
From: Biddeford, ME, USA
Status: offline

Mike, I have to apologize, I can't seem to find the part number. I even went to the walkera sight and looked at all the parts for the 36. The HM-36-Z-27 is something that I ordered but was not usable. Now I can't figure out where I bought my servo rod. It's about 12 inches long (roughly) with a ball screw that attaches to the tail and nothing on the other end. (Just the rod bent like a Z so it fits in a hole on the servo arm). I'll keep looking to see if I can find the part number. I have bought so much stuff for this thing that sometimes I can't keep it straight.

Catch you guys later - Mark

(in reply to MikeU)

Post #: 210

RE: WALKERA 37 - 7/8/2006 7:59:44 PM

Heliwannabe

Posts: 58
Joined: 3/30/2006
From: Scottsdale, AZ, USA
Status: offline

Mike when I put the tail mount on I re-used my old rod shortening it just enought to allow the servo to be 1/10 inch from (aft) of the main body. Of course you loose the threads at one end but you still have adjustment at the other end and or course you can slide the servo up and down the taill boom for the course adjustment. I used a pair of wire cutters to make many scores (indentations) on the end I cut and glued it to the eyelet with JB Weld. I was absolutly unable to pull this end off once it set.

It's your call but it worked for me. I someone comes up with a part number I would eventually like to get the correct part.

Anyone else have any experience with this type of modification?

Jim

(in reply to MikeU)

Post #: 211

RE: WALKERA 37 - 7/8/2006 11:40:40 PM

Heliwannabe

Posts: 58
Joined: 3/30/2006
From: Scottsdale, AZ, USA
Status: offline

FYI I finally roached the stock motor using the lipo battery. Fortunately I was just below hover power on the ground, it surged a couple of times and started running super rough. I opened the motor and one of the coils was burnt up. The outrunner is supposed to be here Monday.

(in reply to Heliwannabe)

Post #: 212

RE: WALKERA 37 - 7/9/2006 12:12:02 AM

armycopter

Posts: 616
Joined: 2/10/2006
From: Biddeford, ME, USA
Status: offline

I'm down until my hitec servo's get here. I robbed two of them from my 37 to put into my 4. My four