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Top Flite Giant P-51 Conversion - 10/13/2004 6:07:38 PM   
Darrell B.



Posts: 383
Joined: 12/22/2003
From: Rogers, AR, USA
Status: offline 		I am starting this thread because I want to convert the 1/5 scale Top Flight P-51 Mustang to electric power. I was reading a thread on the 1.50 size Hanger 9 P-51 that was converted earlier this year, and the technology is finally to the point that I think that I can successfully pull this off. Here is a link to the thread on the Hanger 9.

http://www.rcgroups.com/forums/show...62&page=1&pp=15

I like the Hanger 9 Mustang, but for as long as they have been around, I have wanted to do one of the Top Flight 1/5 scale birds. In looking at Sean's conversion he recommends that I use a 21x14 prop and the Hacker C50 14XL 6.7:1 motor. I am planning on using a 10s4p 9920mAh battery. My personal prefferance is to use a big outrunner, like the Actro 60, the Torcman Monster or if the smaller one can handle the amps one of them, or maybe the new AXI that is comming out this fall. I am hoping that I can keep the weight down to 20# with retracts, but not a lot of other frills. I want a good flyer, and then if I can afford to add a few extras then I might...

I am following Greg Covey's new conversion with great interest, in hopes of getting some good ideas at cutting weight, and for my power system. I'm not sure how long it will take me to put this build together so please be patient with me. There are several things that I am uncertain about, and want to make the right decision on them.

I would greately appreciate any and all input that all of you can offer me, and I will do a conversion in this thread as I go through the process. I will have to pay as I go, so some things may go faster than others.

Thanks in Advance for all of your advice,
Darrell B.
       Post #: 1

RE: Top Flite Giant P-51 Conversion - 10/14/2004 2:24:55 PM   
jonnyjetprop



Posts: 282
Joined: 4/11/2003
From: Bradenton, FL, USA
Status: offline 		http://www.handlaunchglider.de/index.php?id=2&L=1

This company has a 1700 watt outrunner. I've traded a couple of emails with the US distributor. Looks like it could be a promissing motor.

John

(in reply to Darrell B.)
       Post #: 2

RE: Top Flite Giant P-51 Conversion - 10/15/2004 5:59:17 PM   
Glacier Girl



Posts: 7003
Joined: 7/9/2004
From: SomewhereIn, PA, USA
Status: offline 		Darrell,
Please do keep us posted, I for one am looking for a winter project, and it's a toss up between something like this and the VQ P38.

best of luck
BJ

(in reply to jonnyjetprop)
       Post #: 3

RE: Top Flite Giant P-51 Conversion - 10/15/2004 10:15:07 PM   
Hannu Vuorinen


 

Posts: 122
Joined: 8/12/2003
From: Helsinki, FINLAND
Status: offline 		Hi,


Well you would possibly need near +2500 wats power for good scale like power, so I think Torcman 685-20 or 685-30 would be good,
or actro 60-175. I have used a lot Torcman 685-30-22W, it works nicely at 2800watts/10s6p Kokams
On the other hand, Actros has been tradionally been the best motors on the market, I have one 60-140,
but havent got time to test it yet.
EDIT: forgot one very good one: Flyware T-REX40. www.flyware.de

Br,
Hannu

< Message edited by Hannu Vuorinen -- 10/16/2004 10:03:27 PM >

(in reply to Glacier Girl)
       Post #: 4

RE: Top Flite Giant P-51 Conversion - 10/17/2004 1:46:49 AM   
Darrell B.



Posts: 383
Joined: 12/22/2003
From: Rogers, AR, USA
Status: offline 		Thanks for all of the positive input, and encouragement. I will deffinately post here regularly. Please let me know just how much of this build that you want to see. Do you want just the conbersion stuff, or the rest of the ARF stuff as well? I know that there have been several builds on this airplane, so let me know!

Hannu,
Could you tell me, on your Torcman what the Kv is on it, and what size prop are you turning on it. I am hopeing for a 22 to 23" prop, with a 14 to 16 pitch. Are you using an E prop, or a regular one made for Gas? What brand are you using?
John,
Do you think that a person could wind one of those motors with heavy enough wire to handle 2500Watts? I like the idea of the internal cooling!
BJ,
I to would like to build a P38. I really would like to build the Yellow Aircraft version, but I deffinately don't have the coin right now to pull it off. I really think that without the worry of loosing an engin, that one of these could really be put throught it's paces!
thanks for any info that you can offer!
Darrell B.

< Message edited by Darrell B. -- 10/17/2004 1:52:34 AM >

(in reply to Hannu Vuorinen)
       Post #: 5

RE: Top Flite Giant P-51 Conversion - 10/18/2004 11:35:42 PM   
jonnyjetprop



Posts: 282
Joined: 4/11/2003
From: Bradenton, FL, USA
Status: offline 		I'd check with Craig.

John


American Importer

Craig D. Allen

5946 Van Alstine Ave. Suite 6

Carmichael, Ca. 95608

916-519-7368

email Craigdallen@sbcglobal.net

(in reply to Darrell B.)
       Post #: 6

RE: Top Flite Giant P-51 Conversion - 10/20/2004 9:54:44 PM   
Hannu Vuorinen


 

Posts: 122
Joined: 8/12/2003
From: Helsinki, FINLAND
Status: offline 		Darrel,

Mine TM685-30-22W is using 26x12 Menz and 25x12" Engel carbon prop, but as all big Torcman motors are tailormade according to customers wish, it can be winded differently into different style of plane.
Mine is in large 14ft Super Cub, whereas highest possible torque was one of main criterias
for prop select. I would guess in your case wind should be much hotter, maybe in a region of 16-18W.
I would not recommend to use any E-props in this kind of power set-up, like APC, they tend to "swing and bend" while adding power, on same time loosing prop efficiency.
Br, Hannu

(in reply to jonnyjetprop)
       Post #: 7

RE: Top Flite Giant P-51 Conversion - 10/20/2004 10:52:20 PM   
fbw4


 

Posts: 22
Joined: 7/21/2004
From: Phoenix, AZ, USA
Status: offline 		I really enjoyed the Hanger 9 P-51 thread at:

http://www.rcgroups.com/forums/showthread.php?t=233662

This conversion should be more scale but at the expense of more weight. I am very exited to hear your results especially the motor selection and RTF weight.


I would post pictures and information on the E-conversion parts as well as anything interesting or out of the ordinary.

(in reply to jonnyjetprop)
       Post #: 8

RE: Top Flite Giant P-51 Conversion - 10/21/2004 8:08:32 PM   
Darrell B.



Posts: 383
Joined: 12/22/2003
From: Rogers, AR, USA
Status: offline 		John,
I emailed Craig, and he is checking, he also said that he is getting a larger size motor at the first of the year. If I'm still looking by then, I'll consider it.
Hannu,
Would you have the link to Menz? I hear their props are top notch.
fbw4,
I'll be posting here each step of the way, as my conversion progresses. I'm still in the hunt for just the right motor!
Good luck to all,
Darrell

(in reply to fbw4)
       Post #: 9

RE: Top Flite Giant P-51 Conversion - 10/21/2004 9:40:49 PM   
Hannu Vuorinen


 

Posts: 122
Joined: 8/12/2003
From: Helsinki, FINLAND
Status: offline 		Darrel,
I dont know if there is any web site for Menz props, but you can find them at least from
germany, www.hoellein.com. Its quite a popular brand in europe, I am not sayin they are the best, but at least they work very well, at very reasonable price.
in many cases I have tried APC props, but quite often gone back to Menz props.
Its fancy most of F3A pilots likes those, I have not found any especially good for large electric ones
to work best with APC. For higher rev. applications also german Engel Super Silence CF-props works nicely, but expensive

Br,
Hannu

< Message edited by Hannu Vuorinen -- 10/21/2004 10:14:25 PM >

(in reply to Darrell B.)
       Post #: 10

RE: Top Flite Giant P-51 Conversion - 10/22/2004 12:22:06 AM   
Darrell B.



Posts: 383
Joined: 12/22/2003
From: Rogers, AR, USA
Status: offline 		Hannu,
Thanks for the link. It was very helpful. I like the looks of the Menz props, and the 22 x 14 or the 22 x 12 should work just fine. Are they efficient?
I see what you mean about the price of the Engel Props.How would their weight compare with say the Menz wood props?

Thanks,
Darrell

< Message edited by Darrell B. -- 10/22/2004 2:56:18 PM >

(in reply to Hannu Vuorinen)
       Post #: 11

RE: Top Flite Giant P-51 Conversion - 10/25/2004 10:06:45 PM   
Hannu Vuorinen


 

Posts: 122
Joined: 8/12/2003
From: Helsinki, FINLAND
Status: offline 		Hi,

Engel CF props are very light, they are hollow molded, I would guess they are not heavier than Menz, maybe a bit lighter.

Br,
Hannu

< Message edited by Hannu Vuorinen -- 10/25/2004 10:07:13 PM >

(in reply to Darrell B.)
       Post #: 12

RE: Top Flite Giant P-51 Conversion - 10/26/2004 1:10:52 AM   
Joe Ortiz



Posts: 1471
Joined: 2/5/2003
From: Aurora, CO, USA
Status: offline 		Very interesting thread, I'm keeping an eye on this one, I got a House of balsa 1/12 scale that I want to build as e-power, not a giant, but a motivation factor.
Joe

(in reply to Hannu Vuorinen)
       Post #: 13

RE: Top Flite Giant P-51 Conversion - 10/26/2004 2:28:40 AM   
Darrell B.



Posts: 383
Joined: 12/22/2003
From: Rogers, AR, USA
Status: offline 		Joe,

I have the 43" HOB P-51 that I converted using the AXI 2808-24, Jeti 30 Amp ESC, and 1660mAh Apogee 3s2p battery pack. I built it with no landing gear, and either hand or bunge launch. Almost unlimited vertical. 20 Minute flight times easily. Here are a couple of pics...

Darrell

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< Message edited by Darrell B. -- 10/26/2004 2:29:34 AM >

(in reply to Joe Ortiz)