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35% Scale Electric Foam Extra 300LX!

Old 09-05-2004, 12:54 PM
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Levi_Jordan
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Default 35% Scale Electric Foam Extra 300LX!

[X(] Say what???? [X(]

Yup, you read it right... I've been secretly working on this design project for some time now, and it's time to open it up, start some test construction, and see what happens!

It's a 35% Extra 300L.

Span: 106"
Area: 2060 in2

Weight? Not sure on the final weight yet. I think it can be as light as 10# but I will be happy if it comes in under 15#

As shown in the picture the weight is only 6.8 oz!!! My design goal is a 28oz dry fuselage (with camopy, cowl, t deck, and covering.)



Old 09-05-2004, 01:02 PM
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locoworks
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Default RE: 35% Scale Electric Foam Extra 300LX!

awesome, what are you going to use for power? a big out runner of some sort? and is it a cnc cut kit that is usually cut from ply and balsa?
Old 09-05-2004, 01:09 PM
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Levi_Jordan
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Default RE: 35% Scale Electric Foam Extra 300LX!

It's all laser cut... specifically for foam construction. This was cut the am, and it is just a dry run to test out the parts fit on everything. I used blue foam on this one since it won't see the air... Depron for the flight version.

The AXI 4130/20 will handle it easily, but will look funny with only a 18" prop. I have to run the #'s and see if any one makes it, but a 24x5-6 prop would be perfect on it.

(Motor costs only 169.00!!)

Plan on Nimh pack for this one, lipos could work, but it would be a spendy pack. needs to deliver 40 amps.

The other choice is a belt drive and a astroflight...
Old 09-05-2004, 01:33 PM
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ZimboRaider
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Default RE: 35% Scale Electric Foam Extra 300LX!

WOW!

Thats pretty cool Levi! Is it gonna be able to hover?
Can't wait to see the finnished version
Zimbo
Old 09-05-2004, 01:37 PM
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sprintdawg007
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Default RE: 35% Scale Electric Foam Extra 300LX!

yeah, very cool project. I'm waiting for the finished pics!
~A.C.
Old 09-05-2004, 01:43 PM
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Levi_Jordan
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Default RE: 35% Scale Electric Foam Extra 300LX!

I'd like to see some finished pics too!!!

This is my winter project. I have managed to get all the radio gear for it, but still am undecided on the motor. The AXI I talked about above will put out enough thrust to hover, I just need to track down a prop that looks better than the 18" Popsicle stick on the front.

The wing is still in the CAD faze... it's all built up from 2, 3, and 6mm Depron. Custom CF joiner tube.

Landing gear is a big 3D Foamy Carbon gear. Still have to make the plugs for the CF cowl and wheel pants.

Lots to do... Just wanted to share the experience here on RCU as it progresses!

Please pass on your comments, knowledge and suggestions!
Old 09-05-2004, 02:39 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

WOW!! Now that is awesome!!!!

Here is a pic i took at SEFF. It was a giant version of the E3d made all outta Blue FFF with a AXI 4120 with GBX.

Will this be available for $29.95?? Lol, j/k
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Old 09-05-2004, 04:25 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

now that's a 3D Foamy!! yes, I think we need a 29.95 kit
~A.C.
Old 09-05-2004, 05:54 PM
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Levi_Jordan
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Default RE: 35% Scale Electric Foam Extra 300LX!

Not a problem.... 299.5

I always give away cheep stuff when I am testing something new, so if someone has an interest in TESTING (don't know how it's all gonna work ) with me... let me know. I'll get some laser parts to ya for my cost.
Old 09-05-2004, 06:01 PM
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Levi_Jordan
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Default RE: 35% Scale Electric Foam Extra 300LX!

Fuse plans... lots of paper!

Old 09-05-2004, 06:20 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

DAM! that planes awsome! Its so huge..... :O. But, lmao.. a 18in prop would be so funny to see, lmao. I hope you get it flying and show some pics and vids of it
Old 09-05-2004, 06:36 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

All i know is that i always wanted a 30%er but am gonna get one as soon as i get a job.

Levi, if you could put plans on your website or make this available as a laser cut kit, that'd just be awesome!! I can see my self coming to the field with this huge thing, lol.

Try to make available to website. I'd presonally get one.

TTYl,
Andrew T.
Old 09-05-2004, 08:28 PM
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Levi_Jordan
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Default RE: 35% Scale Electric Foam Extra 300LX!

Ya... its big... that's an 8' table its on, and the rudder sticks out another foot and a half, then the cowl on the front another foot...


I'll be getting the plans on the website when it is all done, and if it works out, I'll offer a kit of it too. Flights first....

Did someone say something about an axi on a gear box? I might have to go that rought, I havn't found a low pitch 24" prop out there.
Old 09-05-2004, 08:54 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

Did someone say something about an axi on a gear box?
The pic of the blue FFF plane i posted is an AXI 4120 on GBX. Also, here is a pic of my dad's AXI 2820 in a Great Planes GD-600 GBX.

TTYl,
Andrew T.
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Old 09-05-2004, 10:36 PM
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Levi_Jordan
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Default RE: 35% Scale Electric Foam Extra 300LX!

what prop is he spinning on that?
Old 09-06-2004, 11:33 AM
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Default RE: 35% Scale Electric Foam Extra 300LX!

14 x 7 and motor was around 135 degrees. Didn't have a whattmeter at the time.

Currently running it DD on a Mini 3D.

TTYl,
Andrew T.
Old 09-06-2004, 01:21 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

All i know is that i always wanted a 30%er
Yeah, a 30%er would be cool. Expensive though

Levi,

How are you going to finnish this? Glass? Iron-on?
Zimbo
Old 09-06-2004, 01:52 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

The flying version will be all covered in ultra coat. Depron covers similar to balsa wood.
Old 09-06-2004, 02:00 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

You should try a Lehner Brushless motor, have like a 3:1 power ratio
Old 09-06-2004, 04:48 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

Hey Hot-Rod, how are ya gonna make smoke with that???
Old 09-06-2004, 05:11 PM
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Levi_Jordan
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Default RE: 35% Scale Electric Foam Extra 300LX!

Looks like a hacker B-50Xl would do nicely too.
Old 09-06-2004, 05:21 PM
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Levi_Jordan
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Default RE: 35% Scale Electric Foam Extra 300LX!

Gonna find me a gasser and eat it up...

If I had smoke, then I'd have to go and put little speakers in it and make engine sounds....

I think it'll be way too cool to set the plane out on the taxi with the prop stopped, walk back, jam the throttle and pop into a hover....

I am impressed with the strength so far. I was a bit conserned about the foam flexing. It still has no stringers, and is way stronger than I could have hoped for!
Old 09-06-2004, 11:09 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

3D_Foamy that looks great. I've been drawing up an Extra 260 35% using Auto Cad. It'll be all foam and CF. For the stringers I'm going to use 6mm foam with CF on both sides. I did a little test and the stingers came out stronger than spruce the same size and lighter. Did a little vacuum bagging then cut the stingers in strips. I'm thinking about using this system for wing spars for my foamies since CF tubing is getting harder to find when you need it.

I've done a lot figuring using Auto Cad as to the sq. area of everything in building the plane and the best I think I'm going to be able to do is 17 pounds. That's 8 pounds of batteries alone using 9000mah Ni-Mh batteries, plus I'll be lucky if I get 7 minute flights! Cant find any Lipoly batteries that can handle the draw. The motor I'm going to use is a Torcman TM685-40 which will turn a 26" prop direct drive and up to 36" with their gear drive, but will be pulling around 90+ amps. It weighs around 3 pounds. So that leaves only 6 pounds for everything else! It's going to be a challenge!

For the motor info you can find it here http://www.torcman.de/index_e.

As for the AXI motor I don't think you'll be happy with it, even with a gear drive. It might fly it, but no 3D it would be like putting a 90 size engine on a 35% plane and hoping to hover with it.
Old 09-06-2004, 11:37 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

Hi. It looks like you have copied the Mike Hurley Extra from Model Aviation. I have built 2 of them and the construction looks identical. Jim
Old 09-06-2004, 11:52 PM
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Default RE: 35% Scale Electric Foam Extra 300LX!

I am imbedding .125 carbon tube in the edges of the fuselage sides and doing away with the stringers... I was super happy with the strength.

I am leaning towards the Hacker B50-11XL calcs say 15-19 lbs of thrust on the 6.7:1 GBX.


Gotta admit though... this thing is big foe e power... my commen sense side tells me to drop it down to 30%....

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