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Electric Stunt => Gettin all AMP'ed up! => Topic started by: Bob Hudak on January 01, 2012, 12:15:59 PM
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My 2012 Legacy 40 is in the bones almost ready to cover. Thanks go to all the great installation ideas shared by others. I plan on powering it with an Emax 2826/06 motor, ThunderPower 2700mah lipo battery, Hubin FM9V timer and Castle Lite 50A speed controller. Hope this combo will do the trick !
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Looks good Bob.
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I agree that is a great looking build so far!! #^
I hope you have the CG pinned down. Some provision for moving the battery fore or aft would allow you to make adjustments without adding additional weight. y1
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Nice job Bob ! :)
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I like it!!!! The only thing I question,like John is wether or not it will have enough nose weight with that battery as most of the full fuse E-Planes, that were originally designed for IC power seem to come out slightly tail heavy. Do you have a projected finished weight?
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Thanks for the positive compliments gang ! I don't have the CG pinned down. I should have shown the adjustable battery mounting slot(pic below). The slot allows the battery to move 3/4". After the plane is finished I will install the speed controller and timer to fine tune the CG. If it still needs nose weight I will go with a larger(heavier) capacity battery. I chopped alot of wood out of the rear fuselage sides to lighten the tail. The leading edge of the wing has no spar it has 1/16" molded leading edge sheeting.
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Bob
Is that a "lost foam" wing, or the stock kit wing ?
Dan :)
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LOOKING GOOD Bob! 8) #^ H^^
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Dan It's a Brodak kit wing built on a wing jig. The wing was easy with the jig and came out straight. The foam cradle in the pic was saved from a foam wing from Crist. Thanks for the motor installation tip Dennis. It makes motor removal a snap !
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The bare bones looks great. Only real advantage I can see with electric now is you don't have to fuel proof the airplane. Before you guys tar and feather me, I do know about the steady runs, also the same needle(?) setting run after run, plus all the other stuff. But, what do you do when you run out of electrons and the day is still a perfect stunt day??? H^^
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John,
I can't speak for others but I have the capabilities to charge 3 batteries every 15 minutes. I can't fly that fast so for me running out of electrons isn't a problem. I also have 7 batteries so I rarely need more anyway.
William
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I take a gasser with me for backup in case the electrons don't want to come out of the jug.
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Doc
I get to the field with six (6) fully charged batteries. After 2-3 flights I put one of the discharged batteries on the charger. 48 min. later it is fully charged. And again after another flight or two I put another discharged battery on the charger. I usually fly 7 or 8 flights in one outing, but have done 9 a couple of times. That's enough for me for one day perfect stunt day or not ! :)
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Hey Bob,It's lookin' good!!!Are you going to have it ready for this summer?I'm sure we will run into one another at a contest or two.Can't wait to see it fly.Jeff
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What type charger do you guys use. I still remember a guy flying an RC electric that kept charging his battery using his car battery. When he got ready to go home we had to jump start his car. H^^
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Doc
For my little 4s2200 packs I use a Cellpro Multi 4. It's cheap and pretty idiot proof so even I can use it. There are some very good newer chargers around these days. I will probably upgrade in the spring with a new more powerful charger for my larger size packs. ;) As I said previously I come to the field with my batteries charged and never have to charge more than 2 or 3 off my car battery while I'm there, and that is no problem for the car battery. ;D
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Jeff,
I'm dancin' as fast as I can with the build ! I hope to be done by mid March so I can catch some early trim flights before the Toledo show(good place to buy batteries). I use a Imax B6AC charger that is ac/dc capable. If I kill my battery in the van I have Dan there to give me a jump. ::)
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Just don't do any break dancing LL~ LL~ LL~
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I just completed my 2012 Electric Legacy 40. Here's a few pics . Under the hood it has an EMax 2826/06 960 kv motor with a 12x6ep prop,Thunder Power 4s 2700mah battery,Castle Ice Lite 50 speed controller,and Will Hubins FM-9 timer. It came out weighing 52 oz. with battery on board. As soon as the weather permits I will put up test flights.
Bob
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VERY NICE Bob! Very elegant looking. On the landing gear, is that a cut-out or an applique applied to it?
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Dennis,
The landing gear is cutout and polished using my Dremel tool. I tried it on another plane and haven't bent the gear yet(been flying that one for 2 years). Weight savings came out just shy of 3/4 oz. There's a big round cutout on the bottom of the gear between the mounting bolts also.
Bob
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Hi Bob, Wow.....that's a super job! The weight is really good as well. I'm going to use the 2826 motor in my new competition model as well after many good experiences with the 2820. My good friend Lore Nell placed 3rd in the New Zealand Waikato champs last week-end with his electric Thunder Gazer using the same motor with a Hobby Kings esc and my governor timer system. The weight with a 3000 mAh Nanotech lipo is 63.5 oz. and the 2826 has plenty of power. This model will be going to the next world champs as well, so it shows that you don't need to mortgage your house to have good performance. You'll find that the motor runs very cool as well, especially with that light weight.
I also love your simple but elegant finish, and neat electrical installation. Congrats on a really good job, and please keep us posted as to the flying performance.
Keith R
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Kieth.
Thanks for the compliments. After I get it flying the way I like I'll add it to the "List your setup" forum. I don't want to add it until I have all the necessary info to help others with their quest.
Bob
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565 sq. in.
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Boy did I ! It took alot of hardware on the contest circuit. Sadly I knocked the nose off practicing at Brodak's last year(put it straight in). It still took a 2nd place finish that year in PAMPA intermediate. I'm torn between making another nose for it or building another this coming build season. I got alot of new ideas l would like to try on the next one.
Bob
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I've seen guys repair bad crash then a short time later the wing folds from unseen damage. Are you using the Brodak kit.
MM
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Yes I am using the Brodak kit with modifications for an electric setup. I don't need a wing folding so I will remove the fuselage to see if I can repurpose the wing and tail feathers.
Bob
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Missed ya in DEEE-Troit Bob.What's up with Akron?
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I am working on my first built up fuse electric. Using the Oriental. Looks as if all my electrics will fit. My question is cooling. I see how you did it here. I plan to drill cooling holes in various places for airflow.
My battery mounting scheme may not be as sophisticated. I can place the battery in what I am going to call a tray made of hard balsa or hard wood. I plan to have a velcro strap over that and then some RC foam over that with the bottom hatch holding it all in place with the velcro. There will be some mods to the fuselage. I have already hacked up the engine mount and added a firewall. I will add some thin ply to the hatch attachment points and include blind nuts and 4-40 bolts to hold the hatch on. I will not finalize the battery mount tray until I mess with the CG. Pics later when I get to it. First I want to get my Nall Cadet up in the air. That will be my first electric.
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Dave,
The bottom of my plane was open also(where a pipe would fit) and it had a large air intake on the nose. Be careful with the Velcro straps,I saw a guy lose a battery at the intersection of a vertical 8. Dumping up to 10 oz. of nose weight is ugly for a plane. He was flying a SV 11 installing the battery from the bottom.
Bob
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Bob...thanks for that info. I guess I will build a battery holder like the one on the Nall Cadet, but inside the fuse.