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Old Dec 20, 2009, 05:55 PM
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Quote:
Originally Posted by bungholio View Post
Here is my firewall and cowling. I could mod it more to fit whatever motor but this is just the way the model came. the reason i liked the hobbyking motor was the shape and it would fit well if i just mounted it onto the firewall, as the mustang motor (w/gearbox) would go into the fuselage.

Are there any motors that are in the same shape as the hobbyking motor but brushed so i wouldn't have to mess with the ESC.

I also was wondering about the rpm of the motors and if i needed to worry about what gearboxes i need and that stuff.

Thanks
Depending on the planes weight, you may have to go brushless in order to get it to fly. Do you know what the current weight is? it looks too heavy for the mustang motor/gearbox.
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Old Dec 20, 2009, 06:24 PM
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Olympia,WA
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without reciver(spectrum AR600L 3.9g), linear servo(1.5g) and motor (?g) its 40g

So the total is probably around 49g which sounds pretty heavy compared to the 36.4g UM mustang
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Last edited by bungholio; Dec 20, 2009 at 06:30 PM.
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Old Dec 20, 2009, 06:38 PM
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Olympia,WA
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Quote:
The Hobby King motor is brushless. If you go with it, you will need the esc as well. You will also need to connect the esc to the 6400 and program the 6400 for brushless operation.
How do i program the 6400 for brushless
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Old Dec 20, 2009, 08:36 PM
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Hendersonville, NC
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bungholio:
http://www.spektrumrc.com/ProdInfo/Files/SPMAR6400L.pdf

Why is no one using strip carbon fiber on the wing?
I notice everyone is using rod's supported from the fuselage, is the foam stiffer
in such a small size?
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Old Dec 20, 2009, 09:15 PM
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Southlake, TX
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Quote:
Originally Posted by bungholio View Post
How do i program the 6400 for brushless
You might be best going with a 5g brushless. AUW with mount and prop are about 11g vs about 8g for the Mustang motor/prop and you'll have almost 2X the thrust (on 2s vs. 1s and the mustang motor). ESC weight would be another+ 7g and Extra 1S battery would weigh 10g more, so a cheap ($25 total) 2S brushless setup would weigh about 20g more and should fly a plane over 100g.

to switch the AR6400 to Brushless, bind it normally, then plug in the battery with the throttle stick on the TX up and to the left.

Here's Modfly's tutorial
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Old Dec 20, 2009, 09:25 PM
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can you give me links to the motor, prop, mount, ESC
once i get money for x-mas, i want to get this thing in the air as soon as possible!!!

What do the 2s and 1s things mean
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Old Dec 20, 2009, 10:37 PM
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Quote:
Originally Posted by bungholio View Post
can you give me links to the motor, prop, mount, ESC
once i get money for x-mas, i want to get this thing in the air as soon as possible!!!

What do the 2s and 1s things mean
1s is a single cell Lipo (3.7v)

2s is 2 cell Lipo (7.4v)

An AR6400 can only work on 1S. You can simulate 1s operation, by running a Lipo compatible ESC on 2S and powering the AR6400 with the BEC (Battery Eliminator Circuit) output. Because the BEC of an ESC is normally 5 volts, a Diode can be soldered into the AR6400 Positive battery wire that will drop the input voltage from 5v to 4v, which is just about perfect.

A good 2S battery pack for this would be Zippy 2S 180mAh

5g Brushless motor

or this one, which is lighter (though the specs make it seem heavier) 5.4g motor

Both motors should work fine with the 5043 or 5030 GWS props that are very popular with the SU-26 people. I don't know if the 5g motors come with a prop adapter. Mine did when I ordered them last month, the picture doesn't show it, but you'll need one with these props.

Cheap ESC

Slightly better Cheap ESC that is always out of stock.
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Old Dec 20, 2009, 11:03 PM
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would this motor work?

http://hobbyking.com/hobbycity/store..._Weight_3700Kv
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Old Dec 20, 2009, 11:47 PM
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Originally Posted by bungholio View Post
I don't have any experience with that motor, but it appears it could work, also.

For reference, the empty, hinged Mustang airframe weighs only 18g. The rest is radio, motor/gearbox, bellcrank/pushrods and batteries.
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Old Dec 21, 2009, 12:04 AM
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i think i'll use the motor i found.
i'm still confused on how to make the ar6400 work on a 2s could you draw a circut diagram or something?
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Old Dec 21, 2009, 12:17 AM
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does this sound right, i just found it:
http://www.rcgroups.com/forums/showthread.php?t=1103757
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Old Dec 21, 2009, 12:46 AM
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Quote:
Originally Posted by bungholio View Post
does this sound right, i just found it:
http://www.rcgroups.com/forums/showthread.php?t=1103757
Yes, that is the correct way to do it.

See that this is what I did on my Cox Zero in post #109 in this thread
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Old Dec 21, 2009, 01:25 AM
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Olympia,WA
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Diode

I found this diode do you know if it'll work?

Here's what it says on the side:
IN4001(or IN400l)
and then below that it says:
BL
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Old Dec 21, 2009, 01:36 AM
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Southlake, TX
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Quote:
Originally Posted by bungholio View Post
I found this diode do you know if it'll work?

Here's what it says on the side:
IN4001(or IN400l)
and then below that it says:
BL
A 1N4001 diode should work.
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