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Dec 04, 2007, 11:37 PM
Electric Coolhunter
Thomas B's Avatar
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Molded micro EDF-40 A-4 Skyhawk project: first pictures


Attached is a pic of a neat little molded EDF-40 Skyhawk that I will be trying out soon. I cannot divulge the source of the moldings under threat of death or of being cut off from future parts.....

It is more or less a short nose E model with the avionics hump. 20" long and a 16" span....about 68 sq in. It ought to weigh in at about 5.25 oz or so and have a wing loading of a little over 11 oz/sq ft.

The ruler in the pic is 15" long.

Still dabbling with the exact tail and wing size, though. The wing is a bit too far forward in this picture....needs to go back about 1/2".

Will likely try it out with a flat 6mm depron wing to start, but I hate the look of flat wings...I suspect the final wing will be a simple built up depron wing using 3mm depron top and bottom sheeting with a basic go fast airfoil.

The first one will have a bolt on wing, to enable trying out some different wings later. Controls will be full flying stab and ailerons.

Typical EDF 40 setup: Feigao 25 turn, 10 amp CC controller, 3 cell 730 TP pack, couple of 4.4 gram servos and will use an AR6000 RX.

More as it comes to life.
Last edited by Thomas B; Dec 05, 2007 at 11:13 AM.
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Dec 05, 2007, 12:12 AM
Registered User
Are the fantastic guys back in business?
Dec 05, 2007, 12:31 AM
I'm goin' Falcon nuts
RCAV8R13's Avatar
Quote:
Originally Posted by darmar
Are the fantastic guys back in business?
Wouldn't that be nice. Jerry's a great guy.
RCA
Dec 05, 2007, 01:01 AM
Registered User
Rudi's Avatar
Quote:
Originally Posted by RCAV8R13
Wouldn't that be nice. Jerry's a great guy.
RCA
I agree ! My FTM Mig 15 is still one of my fav.

Rudi
Dec 05, 2007, 01:51 AM
Micro EDF addict
metroidrc's Avatar
nice I'll take one
Dec 05, 2007, 06:06 AM
Same Day Delivery
mike3976's Avatar
And I'll take another!!
Dec 05, 2007, 06:52 AM
Micro EDF addict
metroidrc's Avatar
Only one thing I noticed, and its probably a mod just for stable flight - the nose and wing area do not look scale. The only reason I know this is because I've been working on a 1/32 scale A4 micro edf. If its to make it fly better I completely understand!
Dec 05, 2007, 07:21 AM
Dr John
pmpjohn's Avatar
Subscribing. I want one also.

John
Dec 05, 2007, 07:43 AM
Registered User
dave morris's Avatar
nice, bring it on...
Dec 05, 2007, 09:07 AM
latinflyer
latinflyer's Avatar
Subscribing too. I want one.
Latinflyer.
Dec 05, 2007, 11:07 AM
Electric Coolhunter
Thomas B's Avatar
Quote:
Originally Posted by metroidrc
Only one thing I noticed, and its probably a mod just for stable flight - the nose and wing area do not look scale. The only reason I know this is because I've been working on a 1/32 scale A4 micro edf. If its to make it fly better I completely understand!
The wing is sized for the wing loading needed for good flying capabilities, per the numbers discussed in the post. The test dog will ahve the ability to try different wings....might be able to get it a litttle closer to scale.

the nose is actually quite scale...not all A-4's have the same nose. Some are stretched out. The A-4A had a very small nose. This one is about right for the standard nose. See attached pic of A-4Ms:
Latest blog entry: 2014 events and travel
Dec 05, 2007, 11:12 AM
Electric Coolhunter
Thomas B's Avatar
Quote:
Originally Posted by darmar
Are the fantastic guys back in business?
Nope. Unless he sells the kit line, it will not be back. He is done. Compared to his main business, he looses money every minute that he spends on FTM.

A shame..they were quailty products that were far better engineered than the typical asian foamy...but everyone wants pre painted ARFS.

Note that GWS was never able to deliver a foamy EDF model that could fly on a single EDF-40 or EDF-50...their very own fans.

They are about to deliver some single EDFs at last..that fly on a single EDF-75.

These A-4 parts have nothing to do with FTM......and there are no plans for anyone to kit it. Think of it as a design study more than anything else.
Latest blog entry: 2014 events and travel
Dec 05, 2007, 12:03 PM
Same Day Delivery
mike3976's Avatar
Oh Dude! All that trouble to set-up & mold that nice fuse. and no plans to produce & sell it??? Just is not right!
Dec 05, 2007, 10:27 PM
Supersonic hover
Esprit440's Avatar
Nice Skyhawk Thomas! The A-4 is a really good subject for molded construction. Your weight and wingloading targets are right on for a sporty flier too.

I'm calculating approximately 90 sq. in for a scale planform at 16" WS in Rhino - you could probably go to 14" (~64 sq. in) and be right in scale for 20" length.

Cool stuff!

-Matt
Dec 05, 2007, 11:01 PM
I'm just here to fly
f86esabre's Avatar
Actually the short nose Skyhawks were the A-4A and A-4B.Th A-4C was longer and the A-4E's are even a little longer.No A-4A or B or C had the hump.
Steve


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