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Electric SPA plane - 3/23/2008 5:34:42 PM   
Skip



Posts: 458
Joined: 2/3/2002
From: Sharpsburg, GA, USA
Status: offline 		Has anyone out there converted a .60 size Bridi pattern plane to electric ? I am thinking of building one just to see how it will work out. Utter Kaos, Killer Kaos , etc. I am already anticipating problems with the hatch and battery placement in the small fuse. I believe it will have to be lightened wherever possible with small servos in each wing panel. It would be nice to hear from someone who has tried this and to see what areas didn't quite work out to save me some grief in the building process. Thanks

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RE: Electric SPA plane - 3/23/2008 7:38:44 PM   
Ed Cregger



Posts: 7734
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline 		I wish that I could tell you I have tried it, Skip, but all I have been doing is thinking about it. However, it could be a lot of fun, I'll bet.

One would probably be better off just buying a foam wing kit and then a set of plans so that the scale outline could be maintained for the new fuselage that will have to be designed. I'm not saying that a stock fuselage couldn't be converted, but by the time one is done with accomodating the batteries in the proper location for best balance, a redesign just might be simpler.

I'm just an old windbag in electrics without much experience.


Ed Cregger


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Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

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RE: Electric SPA plane - 3/23/2008 9:52:41 PM   
Bruce Underwood


 

Posts: 48
Joined: 10/29/2003
From: Guntersville, AL, USA
Status: offline 		Skip...Sid Austin, Proprietor of Pyramid Hobbies in Cullman, AL did some "demo" flying of his electric PRIMUS (Taurus) by
Home and Hobby Solutions at the Judges Clinic (SPA) in July of 06 in Guntersville, AL. He flew the EXPERT SPA
pattern with it and it really did well. The kit was assembled by Anthony Boggi, an employee at Pyramid.

There's a story and photos in the SEPT/OCT 2006 issue of the SPA newsletter and may be downloaded from the
SPA website at:
www.seniorpattern.com
just go to DOWNLOADS and click on the SEPT/OCT 2006 newsletter, the story is on page 4 following the coverage
of the Judges Clinic on page 3. Jeff Petroski of H & H Solutions cut this kit. I'll wager it is very similar to the
same config with a Bridi series KAOS you reference.

Hope this is some help...eager to see your "gassie" Utter Chaos (pictured in the MAR/APR 2008 newsletter), on the
circuit this season.

Best wishes, Bruce Underwood Guntersville, AL SPA 15
bunderwo@bellsouth.net

(in reply to Skip)
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RE: Electric SPA plane - 3/23/2008 10:50:16 PM   
Skip



Posts: 458
Joined: 2/3/2002
From: Sharpsburg, GA, USA
Status: offline 		Bruce, My attempts to modify Bridi planes has met with limited sucess. The Utter Kaos I redesigned flew OK but not up to my expectations. A taller fuse is needed to make room for the large battery and pull-pull setup. I must be a masochist to keep experimenting as I am nearing demetia age. I keep trying though. I enjoyed the picture of my stretched Kaos in the SPA newsletter but alas the plane is no longer with us due to a crystal leaving the confines of the 649PCM receiver during a loop. Not a pretty sight!! A full large plastic trash bag went home with me.!! Back to my laboratory Igor!! .... Skip

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RE: Electric SPA plane - 3/23/2008 11:06:43 PM   
Trisquire


 

Posts: 337
Joined: 1/13/2005
From: Columbus, OH, USA
Status: offline 		I wonder if the battery pack can be physically rearranged so the cells are not all stacked on top of each other; or using two half-sized packs connected in parallel, so it will all fit in the fuselage.

Tom

(in reply to Skip)
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RE: Electric SPA plane - 3/24/2008 12:12:05 AM   
Skip



Posts: 458
Joined: 2/3/2002
From: Sharpsburg, GA, USA
Status: offline 		It's certainly possible but the pack would have to be custom made.

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RE: Electric SPA plane - 3/24/2008 12:41:21 AM   
PatternPilot



Posts: 525
Joined: 11/17/2002
From: Knoxville, TN, USA
Status: offline 		Skip,

I will be doing a electric Deception shortly... I have work out the hatch and some other issues.. Should work fine.. If you want some electric help feel free to contact me at scott@rcfoamy.com

scott anderson
spa 239
Team Tanicpacks.com
Team Castle Creations


(in reply to Skip)
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RE: Electric SPA plane - 3/24/2008 1:53:36 AM   
Aurora_60


 

Posts: 148
Joined: 2/16/2008
From: kaneohe, HI, USA
Status: offline 		I am a nitro guy through and through, but when I started looking into an electric set up for a 8 pound 60 size plane, I couldn't believe what I found. And the price was WAY lower than I expected. The batteries, well thats another story.
I'm going to order a motor this week and I do have a Pheonix 80 if I want it. I pretty much settled on a Neu 1912 motor @ 7 cells.


DM

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RE: Electric SPA plane - 3/24/2008 7:10:57 AM   
Ed Cregger



Posts: 7734
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline 		I discovered the same thing Aurora. But they won't fly without the batteries, you know. <G>

That isn't going to stop me, nor you, from what I can tell by your comments. For me, it is just something new to learn and something that will add a bit of excitement. I'm not abandoning my glow engines by any means.


Ed Cregger



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RE: Electric SPA plane - 3/24/2008 10:05:07 AM   
Aurora_60


 

Posts: 148
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From: kaneohe, HI, USA
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quote:

ORIGINAL: Ed Cregger

I discovered the same thing Aurora. But they won't fly without the batteries, you know. <G>

That isn't going to stop me, nor you, from what I can tell by your comments. For me, it is just something new to learn and something that will add a bit of excitement. I'm not abandoning my glow engines by any means.


Ed Cregger


I was just experimenting on the Neu website, they have a nifty set-up calculator that helps you "see" adjustments when props, motors, cells, etc.. are changed.
After a few hours I found a set up with 18 pounds of thrust, a prop speed at 223 mph and a wieght of 36.9 oz. (2.3lbs) With the batteries!! These are all Static figures, but they look pretty darn good to me !
This isn't the Neu 1912 motor I was planning to get. I chose that motor around the 12/12 props. I found that Bolly will modify a utility carbon prop for me (at an expense $) but Wow, what a difference a prop makes!
Plan on calling all the manufacturers for advice on the set up this week!
Now, what do I put it in?


DM

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RE: Electric SPA plane - 3/24/2008 3:28:56 PM   
Nathan King



Posts: 1468
Joined: 5/29/2007
From: Omaha, NE, USA
Status: offline 		Those calculators will help ballpark everything, but there's no substitute for metering and recording everything under load. Between fudged marketing figures and slight variations in every electronic component you may be surprised what the "real" math suggests as 'best setup.'


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RE: Electric SPA plane - 3/24/2008 3:29:05 PM   
Trisquire


 

Posts: 337
Joined: 1/13/2005
From: Columbus, OH, USA
Status: offline
quote:

ORIGINAL: Skip

It's certainly possible but the pack would have to be custom made.


The electric Primus on the seniorpattern website uses a five cell pack. I cant imagine it's that thick of a battery pack. Does the Primus have a taller fuselage than a Kaos?

Tom

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RE: Electric SPA plane - 3/24/2008 4:03:27 PM   
Skip



Posts: 458
Joined: 2/3/2002
From: Sharpsburg, GA, USA
Status: offline 		It depends on the placement of the servos. My preference is small high torque sevos in the tail to allow more to go in the c/g area of the fuse above the wing. Skip

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RE: Electric SPA plane - 3/24/2008 4:24:39 PM   
Trisquire


 

Posts: 337
Joined: 1/13/2005
From: Columbus, OH, USA
Status: offline
quote:

ORIGINAL: Skip

It depends on the placement of the servos. My preference is small high torque sevos in the tail to allow more to go in the c/g area of the fuse above the wing. Skip


That's what I would do. Pretty much standard procedure an modern planes; even glow powered ones. Two servos in the tail for rudder/elevator, and one in each wing for the two ailerons.

Tom

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RE: Electric SPA plane - 3/24/2008 5:52:57 PM   
KrisG


 

Posts: 159
Joined: 11/17/2002
From: Izegem, BELGIUM
Status: offline 		When is somebody going to make battery packs in the shape of a tuned pipe? Nobody will feel embarrassed to have something like that hanging outside the plane, it is very convenient to change, plenty of cooling ... that'll be the day!

It won't even look weird if there is smoke coming out of them

Kris G

P.S. oh, if anybody want to file a patent on this ... I was first!

< Message edited by KrisG -- 3/24/2008 5:53:54 PM >

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RE: Electric SPA plane - 6/21/2008 2:52:42 AM