|Apr 16, 2009, 12:51 PM|
BIG-BIG Easystar, The Idea.
I decided to make a second easystar.
Inspired by scrtsqrl blogís , I wanted to build a big-wing easystar.
It should be capable to carry a 180 gram A-HD+ - 1080P High Definition Camcorder + extra for FPV gear.
I also would like to be able to use bigger propís (8x4) so I have a bigger choice of engines an maybe even a better flight time.
I also would like to extend the hull so the plane looks more in balance with the big wings and gets more momentum of the tail elevator.
Well,Ö. Iíll would like a Big-Big Easystar.
This is the idea.
Cut up my new easystar and ad 2 pieces of epp foam, glue it back together, shape it and paint it. And there is de Big-Big Easystar.
Here are some Photoshop computer pictures so youíll se what I mean.
First foto: The original plane and some ideas how to cut the plane. But non of them are good.
2e foto : If I cut it like this, I would have height and length!
3e foto : Add twoo sheets of foam and it would look like this.
next time I'll start making the Big-Big Easystar
|Apr 16, 2009, 01:10 PM|
Big-Big Easystar, Let's start.
Cutup an easystar!
1e foto: I have to cut sheets of 24 mm EPP fome.
2e foto: Now I have to cut the easystar in two. (top cut)
3e foto: Make the second cut, glue in the Epp sheet in and cut it strait again.
next time: glue in the EPP sheet in and shape the plane.
see you, Frans
|Apr 16, 2009, 01:37 PM|
Big-Big Easystar, giving her the shapes.
1e foto: Glue the top epp sheet in and shape the plane.
First with a knife than with a sand belt grinder.
2e foto: looking good!
next, finish and paint.
see you, Frans
|Apr 16, 2009, 01:49 PM|
Nice! Very impressive
Given that extra sail area up front, may I suggest that you enlarge the vertical stab. In particular make it taller so that it clears the added height of the motor.
I can see that this will allow you to fit a bigger prop. With the longer tail boom, you'll probably have more longtitudinal stability.
What other advantages do you expect with your enlargement?
While you're at it, did you think of using Cularis wings?
I'm looking forward to your maiden...I'm sure we'll all learn from your build.
|Apr 16, 2009, 02:49 PM|
Great layout of the additional foam! Have you selected the power system yet? I am curious about the additional thrust from the larger prop if you will be able to go with a lower KV motor and still climb out quickly. Probably much more efficient that way. When I finally try out an FPV setup, I will either use an Easy, or the Maxi Swift. I like the idea of the large wings, so I might go with this style setup and the Cularis wings.
Any plans for Gyros?
Thanks for the post and idea! Will continue to check for updates. Thanks Sqrl for linking this in the ATTF thread.
|Apr 16, 2009, 04:45 PM|
Hi, Blaze.45 and SCRTSQRL
Nice I can ďspeakĒ to you at last SCRTSQRL .
You are the reason I started with FPV.
I have read all your articles on the FPV forum and I like the way you enjoy your hobby with limited funds.
>Given that extra sail area up front, may I suggest that you enlarge the >vertical stab. In particular make it taller so that it clears the added height >of the motor.
Well, I did enlarge the vertical stab, but only the moving part of it and that seemed satisfactory. I left the horizontal tail part as it was but later I enlarged that to because the plane had a tendency to nod al the time. (say yes) But Iím running ahead, you wil see that later in my build log.
>I can see that this will allow you to fit a bigger prop. With the longer tail >boom, you'll probably have more longtitudinal stability.
For now I used a clipped 8x4 prop ( probably 7.5x4) and a Turnigy 1900 KV brushless outrunner from HobbyCity (nr: TR-26-1900) and a 3 cel Lipo. (2500mAh to a 4000 mAh)
Static I measured 18 A full power and it gives the plane a 45 degree climb- angle.
But probably I will try different motors.
Now, with this setup, I have more engines to choose from.
>What other advantages do you expect with your enlargement?
Well, I all do this for an stable platform for my Aiptek HD+ camera.(180 gram) and FPV setup.
And of course for the experiment itself.
But there are disadvantages also, the plane will be a bid heavier than a ďnormalĒ Big wing easystar.
>While you're at it, did you think of using Cularis wings?
No, I did not think of that.
Will Cularis wings fit easily? Is it done before?
Multiplex will probably come out soon with a new Easystar2.
Anyone knows something about that??
Iím very curious.
Hope to hear more suggestions from you all, thanks a lot.
|Apr 16, 2009, 05:32 PM|
Big-Big Easystar gets its color
Here I am again.
I made an thin polyester tube (30 mm ) to put the 1900KV outrunner in.
I enlarged the vertical stab, but only the moving part. (what is the word for that?)
I put the servos and the electronics in.
I used the first hidden compartment in the hull for the receiver and the place where normally the servos are for the giro on the ailerons.
(Idea from SCRTSQRL)
The servos are more to the rear now, so I could still use the original plastic/metal servo links (=link between the servo and the rudders, what is the word?)
I painted the plane in candy vivid colours.
( I live in a very green swamp and lost planes before so I need colours that are very visible in a green environment)
But now I have to buy dark sunglasses to fly this plane
I have had a problem with the paint, it donít stick very well on the Elapor of the plane. Elapor feels a bid greasy but it is not.
Anyone have a suggestion for that?
Well here are pictures of the Big_Big EasyStar and the more "normal one" so you can compare them.
Soon the maiden flight take place. Wish me luck.
And keep sugestions coming.
|Apr 16, 2009, 06:47 PM|
clever mods you came up with.
Regarding the "technical" terms:
Moving part of the vertical fin = rudder
Link between servo and rudder/aileron etc= rod
The elapor feels greasy because the factory uses light oil in the molds to prevent the parts from sticking to the molds.
Multiplex sells a primer that can be used before painting the elapor:
|Apr 17, 2009, 12:39 AM|
OK like Connexxion said about the oily substance used at the factory is true but if you are going to paint, I recommend you rub down the plane real good with either methyl hydrate (or alcohol stove fuel) OR acetone to remove the oily film. Then paint! And yes since you are in Europe go with the Multiplex paint other wise Krylon paint for plastic from any hardware store will do.
|Apr 17, 2009, 01:13 AM|
really nice and clever job, my compliments!
In the first picture it seems that the big one has a little banana shape, i.e. the fuselage is warped to the left (to the right looking from the nose)...
Hope this is just an optical illusion...
|Apr 17, 2009, 01:32 AM|
That is a really brilliant solution to carrying a HD Camera. I would put the FPV camera on the "step" forward of the wing and the HD Camera in the cockpit. You might have to carry the battery externally as I have, just under the wings, by the CG to balance properly. No need to dig into the faom and compromise the structure. The BWEZ* is perfectly happy with the batteries mounted this way.
I think the Cularis wings may be more complicated because of the way it mounts onto that fuse...Forget that suggestion for now...
One suggestion: Do not maiden w/ gyros...ensure the plane performs well with out gyros first...
Keep it up. We're waiting to see the maiden video!
Thanks for sharing.
I hope MULTIPLEX is watching!
|Apr 17, 2009, 06:22 AM|
good work ! finally someone accept the normal easystar is not an uptimal size plane for FPV, and do something about it :-)
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