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Old Sep 14, 2010, 08:21 AM
Blackhawk
United States, TX, Fort Worth
Joined Jan 2007
304 Posts
Question
Hangar 9 Ultrastick 40 - Electric convert

I would like to convert my glow Hanger 9 Ultrastick to electric. Should I mount the motor to the firewall or do I need a motor mount? Does the motor mount at the center of need to have some offset?
How about cooling holes?
Battery hatch modification?
Here are what I have in hand for the conversion

Motor: Turnigy C5055-400
ESC: Turnigy 85A SBEC 2-6 Lipo
Battery: 4 3s 2200mah lipo

All ideas and suggestions are welcome. Thanks!
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Old Sep 14, 2010, 10:26 AM
Air, Ground & Water
freechip's Avatar
Canada, ON, Rockland
Joined Aug 2008
24,658 Posts
Chances are you're going to need a motor mount because the e-motor is probably alot shorter the the gas motor you had. IN order to get the rigght distance for the prop you wil lneed a motor mount. Similar to this.
http://www.hangar-9.com/Products/Def...ProdID=HAN4245
This is for e-flite motors so not sure about the hole pattern for yours. It just to give you an idea of what to look for.

On some plane a little down and right angle is needed to counteract motor prop torque. Some planes have this build in the firewall and others do it with the motor mount. If you're doing it with the motor mount you may also want to position the mount so that the end of the motor shaft is centerl in the cowling if you have one and or centered in the airframe so tha prop looks centered.

As for battery hatch then that going to take some thinking on your part. On my hangar 9 T-34 mentor since I already had to remove the main wing for transportation I just came up with a method of being able to quickly and easily remove the main wing and so I do this to swap battery.
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Old Sep 14, 2010, 03:25 PM
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MrEWorm's Avatar
United States, IL, Aurora
Joined Sep 2007
1,314 Posts
I did a Big Stik 40 with a Turnigy 4260 650 KV motor and a Great Planes mount. I did mine as a trike so I needed to use this type of mount. If you are doing a tail dragger, you could use big standoffs they sell at HK 9 (see pic 2).

In pic 1 I remove the wing (This is my current setup) to install the battery. In pic 2 (an abandoned project) I loaded the battery in the top of the fuse and held on the cover with velcro straps.

I use 4S 4000 Mah packs. I have a Rimfire .46 on order to replace the Turnigy SK motor.
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Old Sep 14, 2010, 04:24 PM
Blackhawk
United States, TX, Fort Worth
Joined Jan 2007
304 Posts
I found this article from Horizon. In the picture the motor mounts directly to the firewall.
What is the pro and con for mounting the motor this way.
http://www.horizonhobby.com/Articles...ArticleID=1563
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Old Sep 14, 2010, 05:00 PM
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MrEWorm's Avatar
United States, IL, Aurora
Joined Sep 2007
1,314 Posts
I wanted the motor out front so that the plane would not be tail heavy. I don't like the idea of adding weight to move the cg. I have seen Stik planes with the motor mounted directly on the firewall. The choice is all yours when you're doing a conversion.
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Old Sep 15, 2010, 01:01 PM
Sleepy Hollow, IL
Joined Dec 2008
459 Posts
How My 40 Stick Conversion Looks

kz4q66,

I have been flying a 40 Stick conversion for some time and it has worked out great. I am using a Monster Power 46 with a Turnigy Plush 60 ESC. I also have a separate BEC for the receiver and servos. The pictures show the layout of the hatch and mounting of the motor. My batteries are 5S-4000 mAh and the plane balances fine with the battery position shown. The motor is mounted right to the firewall.

One important thing is to make a hole in the bottom of the fuselage about three times the size of the air inlet hole for the air outlet. I put mine right behind the servo plate for the tail feather servos.

ampmaker
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Old Sep 15, 2010, 03:17 PM
Blackhawk
United States, TX, Fort Worth
Joined Jan 2007
304 Posts
Ampmaker,

Did you mount the motor at the center of the firewall? Any offset needed for right trust?
How long can you flight with the 5s - 4000 mah?
Those pictures helped a lot. Thanks!
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Old Sep 15, 2010, 03:22 PM
Sleepy Hollow, IL
Joined Dec 2008
459 Posts
kz4q66,

The motor is centered over the hole in the firewall. No offset was added. With good throttle management, 9 to 10 minute flights. With agressive flying and aerobatics, about 5 to 6 minutes.

ampmaker
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Old Sep 20, 2010, 04:32 PM
Blackhawk
United States, TX, Fort Worth
Joined Jan 2007
304 Posts
Since I already have several 3s 2200 mah so I will connect two of them together to form an 6s 2200 mah. Should I get about 8 to 9 minutes of sport flying?
Where should I cut the cooling air hole on the fuselage?
Here is the final list of equiments that I am going to use

Motor: Turnigy C5055-400
Battery: 2 3s 2200 mah connected in series
Prop: 13x8
ESC: Castle Creation Ice 75A
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Old Sep 20, 2010, 06:41 PM
Sleepy Hollow, IL
Joined Dec 2008
459 Posts
kz44q66,

Look at post #6 for where to put the cooling holes on the fuselage.

ampmaker
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Old Sep 21, 2010, 07:45 AM
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MrEWorm's Avatar
United States, IL, Aurora
Joined Sep 2007
1,314 Posts
Quote:
Originally Posted by kz4q66 View Post
Since I already have several 3s 2200 mah so I will connect two of them together to form an 6s 2200 mah. Should I get about 8 to 9 minutes of sport flying?
Where should I cut the cooling air hole on the fuselage?
Here is the final list of equiments that I am going to use

Motor: Turnigy C5055-400
Battery: 2 3s 2200 mah connected in series
Prop: 13x8
ESC: Castle Creation Ice 75A
6-7 minutes may be too much. Do you have a separate BEC? Don't ewant to risk your new air frame.
I made a connector so that I could do that as well but have not yet had the opportunity. I want to order some of the 6S HK nano-techs with 25-50C if this experiment works well.
Please let us know what kind of flight time you get on this setup.
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Old Sep 21, 2010, 10:19 AM
Blackhawk
United States, TX, Fort Worth
Joined Jan 2007
304 Posts
Using "eMotor Calculator" from Castle Creations, http://www.ecalc.ch/motorcalc_e.htm?castle, I can get about 3.5 minutes of "Flight Time" or about 6 minutes of "Mixed Flight Time" base on my setup with 6s 2200mah battery.
If I use a 4s 4500mah with 14x9 prop, I will get 9.5 minutes of "Flight Time" and 16 minutes of "Mixed Flight Time".
The Castle Creations 75A has build in switching BEC to output up to 5 amps of servo power. Should this be OK with 6 analog servos?
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Old Sep 21, 2010, 02:33 PM
Blackhawk
United States, TX, Fort Worth
Joined Jan 2007
304 Posts
Looks like the CC internal BEC only good for up to 3s. I need to get a separate BEC for this project.
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Old Sep 21, 2010, 04:26 PM
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MrEWorm's Avatar
United States, IL, Aurora
Joined Sep 2007
1,314 Posts
Actually, I don't worry about BEC's. I do however, time my flights. I just picked up a DX8 and think that I'll be able to monitor battery packs on my radio screen using the TM1000.
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Old Sep 21, 2010, 05:47 PM
Blackhawk
United States, TX, Fort Worth
Joined Jan 2007
304 Posts
Wow, DX8 and TM1000. Santa came early for you!
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