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Author Topic: Starting my first electric "Electra".  (Read 1483 times)

Offline Ty Marcucci

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Starting my first electric "Electra".
« on: April 08, 2011, 05:31:46 PM »
This model is truly different from any I have built since 1954.
Ty Marcucci

Online Dennis Adamisin

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Re: Starting my first electric "Electra".
« Reply #1 on: April 08, 2011, 06:13:22 PM »
Ty:
First off CONGRATS on the electric, like John P said - I think you will be hooked.

That is a unique spar set-up.  Ought to be pretty stiff tho.  Electra calls for over/under leadouts too, doesn't it?
Denny Adamisin
Fort Wayne, IN

As I've grown older, I've learned that pleasing everyone is impossible, but pissing everyone off is a piece of cake!

Offline John Miller

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Re: Starting my first electric "Electra".
« Reply #2 on: April 08, 2011, 07:52:40 PM »
Ty:
First off CONGRATS on the electric, like John P said - I think you will be hooked.

That is a unique spar set-up.  Ought to be pretty stiff tho.  Electra calls for over/under leadouts too, doesn't it?

Yes, the spar is a sort of faux I-beam. The ribs twist and lock into place, but the spar does not go all the way to theunderside of the sheeting.

The sheeting must be split, and a small pie slice removed, so that the sheeting will pull down tight to the tip and tip ribs.

It's important to retain the over under leadouts, and make sure the up and down lines exit at the proper locations. The exit location shown on the plans is very close to where you want them, but make the over-under leadouts adjustable about 1/4" easc way.

The wing does come out pretty stiff, with the tip sheeting, I think you're going to enjoy the build.

Ty, if you have any questions feel free to contact me, or better yet, Bart may jump in to help. H^^
Getting a line on life. AMA 1601

Offline wwwarbird

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Re: Starting my first electric "Electra".
« Reply #3 on: April 18, 2011, 12:27:40 AM »
 Cool project Ty.

 I don't know why exactly, but all those "in the know" on the Electra insist that the over/under leadouts be used. I bought the RSM kit a year or so ago and I really want to build it. I even have the paint scheme figured out. Building that funky wing design flat out scares me though so it's still on the shelf. Call me chicken I guess.

 The April 1996 issue of Flying Models has a great article by John Miller about the Electra. After wanting to build a nice Classic plane for a while reading that article is what put me over the edge and got me to order the kit.

 It would be WAY COOL if you could do a nice build report with pics as you go on this project in the Building Techniques section. I'd be very interested in getting a good look at building it.

 Here's some Electra stuff...

 http://www.clstunt.com/htdocs/dc/dcboard.php?az=show_topic&forum=103&topic_id=347735&mesg_id=347735&listing_type=search
Narrowly averting disaster since 1964! 

Wayne Willey
Albert Lea, MN U.S.A. IC C/L Aircraft Modeler, Ex AMA member

Offline John Miller

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Re: Starting my first electric "Electra".
« Reply #4 on: April 18, 2011, 09:12:25 PM »
I'm sorry to hear you are having problems Ty. Just so you know, it was Dick WWilliams who designed the wing, and fuse that way. Once you are familiar, and understand his construction methods, they build easily.

Start by building the spar. Make sure its straight, and matches the drawing.

Mark centerlines on the ribs.

You then slip the ribs into place. It's easy to slid them in, match up with the little slots, and then twist 90 degrees, so the rib is now 90 degrees to the flat of the spar. As you found out, DO NOT glue them in place yet.

I made some holders out of scrap balsa, to hold the spar up off of the building board, and keep it  perpendicular to the building board.

Mark the centerline of the leading and trailing edges, and tack glue them to their respective locations at the front, or rear of the ribs.

Once you are satisfied that everything is where it needs to be, you can glue the ribs into place, and finish gluing the leading and trailing edges into place.

Trailing edge sheeting is next. Make sure everything is straight before you do anything more than tack glue.

The leading edge sheeting is a little more daunting at first glance. The taper changes over the last 3 or 4 ribs, and the sheeting will not lay down properly with out making a slice from about the middle of the sheet where the sheeting last naturally contacts the rib, all the way out to the end of the sheeting.

The trick now, is to lay the front half tight to the ribs, out to the tip, then lay the back half tight to the ribs, but, overlapping the front piece.

Use a sharp exacto knife, and cut a straight line, through the overlaps. Remove the resultant balsa triangles. The remaining balsa shoulf now easily glue down to the ribs. Use thin ca and glue the edges of the slit where it comes together. You should have an almost invisible joint. The sheeting will glue down the the 1/8" balsa wing tip.

You can use a fuselage jig, you just let the formers barely touch at the widest part of the former, and use some thin Ca to hold them in place.

Wet the outsides of the aft fuselage, and roll the sides into the curve, using thin Ca to hold it into place.

The beauty of this style of fuse construction is the great stregnth, and twist resistance, gained from the curved sides.

Some builders have gotten confused when inserting the wing. The wing is basically symetrical in the fact the both wing panels are equal when you build it. The wing is inserted with the centerline of the wing along the inside of the inboard fuse side. This gives a modicum of asymetry in relation to the centerline of the fuse. It also means that the Bell Crank, and the gear and wheels are not located symetrical to the centerline of the wing. Please pay attention to the plans. Unfortunatly, the plans in the kit only show one side of the wing, so sometimes builders get confused.

Feel free to ask, if you've any more questions. H^^
Getting a line on life. AMA 1601

Offline wwwarbird

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Re: Starting my first electric "Electra".
« Reply #5 on: April 19, 2011, 06:21:21 PM »
 All of my fears have been confirmed. ;D
Narrowly averting disaster since 1964! 

Wayne Willey
Albert Lea, MN U.S.A. IC C/L Aircraft Modeler, Ex AMA member

Offline John Rist

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Re: Starting my first electric "Electra".
« Reply #6 on: April 21, 2011, 12:50:25 PM »
Ty,

Maybe you should try an electric profile first. Just to get your feet wet with electric.  The motor, battery, speedcontroller you bought for the "Electra" would work in a profile ship.  I know, for a fact, that you have many profile ships hanging on the wall that you could convert.  What brought this to mind was Ron Heckler's article An Electrified Stunter on page 60 of May 2011 Model Aviation.  It's a good read.
John Rist
AMA 56277

Offline wwwarbird

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Re: Starting my first electric "Electra".
« Reply #7 on: April 24, 2011, 10:02:29 PM »
 Thanks for volunteering to be the guinea pig here Ty. :-\

 The still sealed, NIB kit that I purchased roughly a year ago is the RSM one. It's the first RSM kit that I've got direct experience with. At the time I was really excited to build an Electra, I really like the long canopy version. Once I received it I looked over the kit and plans very carefully. The first thing I noticed and didn't like at all was that the plans don't even show the entire wing. Normally I don't need to rely on the build instructions all that much, but accurate and complete plans can be key to a new build. If it's a construction style that I'm not familiar with, like in this case, it is nice to have accurate and thorough plans and instructions. I'd have to dig it back out and check, but I don't think there is build instructions in my kit either, only the plans. Either way, I can't say that I was even remotely impressed the provided information in my Electra kit.
Narrowly averting disaster since 1964! 

Wayne Willey
Albert Lea, MN U.S.A. IC C/L Aircraft Modeler, Ex AMA member

Offline John Miller

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Re: Starting my first electric "Electra".
« Reply #8 on: April 24, 2011, 10:58:39 PM »
For those who may desire to build the Electra, or Tempest, (Same wing) here's a small Drawing in the Adobe pdf format, that you can print out on your home printer. It illustrates how to construct an adjustable over-under leadout assy.

Cheers

Getting a line on life. AMA 1601

Offline wwwarbird

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Re: Starting my first electric "Electra".
« Reply #9 on: April 24, 2011, 11:19:35 PM »
For those who may desire to build the Electra, or Tempest, (Same wing) here's a small Drawing in the Adobe pdf format, that you can print out on your home printer. It illustrates how to construct an adjustable over-under leadout assy.

Cheers



 Thanks John, that's a nice little detail that will help. This plane will be a pretty good challenge for me whenever I get to building it.

 I do want to use the over/under leadout setup. What's the secret to keeping the leadout exit slots in the wingtip sheeting as small as possible, but still having them line up nicely with the leadouts themselves when they are under tension? Seems to me like that will be a trick in itself.
« Last Edit: April 24, 2011, 11:37:12 PM by wwwarbird »
Narrowly averting disaster since 1964! 

Wayne Willey
Albert Lea, MN U.S.A. IC C/L Aircraft Modeler, Ex AMA member

Offline John Miller

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Re: Starting my first electric "Electra".
« Reply #10 on: April 25, 2011, 09:52:38 AM »
I'll check my photos, and see if I can find one showing the details at the wingtip. It seems to me that Clints Tempest is set up this way. Got a picture Clint?
Getting a line on life. AMA 1601

Offline wwwarbird

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Re: Starting my first electric "Electra".
« Reply #11 on: April 25, 2011, 12:49:46 PM »
 I remember on Jeff Welliver's he had a seperate narrow front to rear slot for each leadout. They were only about 3/4" long and one above the other of course.

 Here's what I don't get, since the leadout adjuster and it's guides would be inboard a bit from the internal side of the wingtip sheeting, how do you get the exit slots in the sheeting precisely aligned heightwise?
Narrowly averting disaster since 1964! 

Wayne Willey
Albert Lea, MN U.S.A. IC C/L Aircraft Modeler, Ex AMA member

Online Dennis Adamisin

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Re: Starting my first electric "Electra".
« Reply #12 on: July 25, 2011, 04:12:21 PM »
Well, I have stopped all construction on the Electra and have finished the electric installation on a modified Tom Morris quick build version of the Magnum Plus.  I am now convinced it is easier to build a plane DESIGNED for electric, than to try and convert one already built for IC. The battery area needs to be bigger than the area for a fuel tank, first and foremost, as trying to remove or modify this area can ruin the fuselage. Guess how I learned this tid bit. Cowls are easier with less holes, but aLL THAT WIRING CAN BE A STRUGGLE TO GET INTO PLACE. kINDA LIKE HERDIN CATS.  LL~ LL~ LL~

Retrofits are possible but (as you discovered) can be painful.  Wiring on the next will be better, and the next one better yet.

Got any I-Beam kits laying around (ok that was a dumb question)  LOTS of room to mess around inside on those, just have to make sure the wiring does not touch the bellcrank arm (guess how I learned?)
Denny Adamisin
Fort Wayne, IN

As I've grown older, I've learned that pleasing everyone is impossible, but pissing everyone off is a piece of cake!


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