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Old Jul 16, 2012, 03:19 PM
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sloperjoe's Avatar
United States, WA, Vancouver
Joined Mar 2012
739 Posts
Build Log
A-6 Intruder 50mm w/PLANS, "i12flyrc" maidened 40" 70mm version W/VIDEO

UPDATE: plans added on page #8, maiden video on page #6
UPDATE: "i12flyrc" Mike has maidened his 40" span 70mm version! post #265 to read the flight report


hi all,
I picked up two of these fans http://www.hobbyking.com/hobbyking/s..._Version_.html and was planning on a twin project, then a single, then a twin,.....I decided to go with a single. I have test run these fans and I am impressed, very smooth and really push.
I have the plans penciled out and have a good idea on how I want to build it. I wont ink anything till it flies in case I change something but I think it will be as drawn. this is not an exact scale build but should look pretty close when done. I "think" I can do this airframe at 4oz's maybe a tad less, but that is my target. I want to be at 10oz's or less AUW, if it hits 11 or 12 thats fine too but I am going to try for lite as possible. I will be using depapered $tree foamboard.

specs:
WS.........................26"
LNGTH...................28"
FAN........................HK 50mm Alloy EDF 4800kv (3s Version)
ESC.......................HK Red Brick 20A ESC
SERVOS...............2 x 9gm
BATT.....................SKY LIPO 1000mah 3s 30c
AUW......................10-12oz's
RATED THRUST..16oz's (from some testing I think this is accurate)
MAX AMPS............18

so there it is, and I hope to start cutting tonight

couple plans pics to tease you with

Joe
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Last edited by sloperjoe; Nov 20, 2012 at 02:19 AM.
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Old Jul 16, 2012, 03:53 PM
Registered User
Hampton, VA
Joined Mar 2009
1,238 Posts
Sloperjoe,

You're just an EDF building machine!!! And you're not picking any easy builds either. I think, I've only seen ONE A-6 Intruder build, and it was a pusher at that. Do your stuff, man. I'm happy to see ya work your magic.

Ksqm
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Old Jul 17, 2012, 12:57 AM
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United States, CA, San Diego
Joined Aug 2010
255 Posts
keeping an eye on your build Joe.

Vic
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Old Jul 17, 2012, 01:15 AM
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United States, WA, Shelton
Joined Feb 2012
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Sounds like healthy little fans! Will be watchin
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Old Jul 17, 2012, 02:45 AM
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United States, WA, Vancouver
Joined Mar 2012
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just got home from work....now I can go to work

Joe
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Old Jul 17, 2012, 05:20 AM
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United States, WA, Vancouver
Joined Mar 2012
739 Posts
thanks guys,
well got the wing parts cut and the tail feathers too. got to cheat some on the tail because I had a two layer sheet laminated and left over from a previous build. tomorrow I will lam the wing and get it and the stabs sanded to shape. the wing as you can see will be 3 layer, there will be no spar, I "think" it should be plenty stiff at three layers for the 10oz load (hopefully 10oz )
weight for these parts so far is a whopping 1.5oz's and thats before sanding witch should put me at closer to 1oz or less for the finished wing and stabs...so far so good
I also redrew the nose to be closer to the scale three view I have.
time for beddyby

Joe
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Old Jul 17, 2012, 06:12 PM
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Crystal River Fl.
Joined Jul 2008
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Wow Joe! You've turned into a building machine! This looks like it will be another great build, will be watching!!!!! w
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Old Jul 18, 2012, 02:53 AM
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United States, WA, Vancouver
Joined Mar 2012
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more of an experimenter than a building machine
I've always loved designing and building things, its actually what I do for a living, only with piping systems, tubing systems, and steel fabrication...RC aircraft is way funner an way more relaxing.
anyhow I had a cool brainstorm on a way to build the intakes that should be easy to do and look good. I want to build the Intruder with the same concept as the Phantom so the airframe will be made in groups ie wing, upper/lower fuselages, and tailgroup. my hope is to show building complex shapes isnt really all that complex and hopefully some of you will build one too....maybe think of a better way to do something and improve the design..but mostly for me...THIS IS JUST FUN
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Old Jul 18, 2012, 05:09 AM
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Hampton, VA
Joined Mar 2009
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,

This is going to be a real treat! Build on! Build on! Build on!

Ksqm
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Old Jul 18, 2012, 06:24 AM
Mike
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Columbus, Ohio, United States
Joined Jul 2003
937 Posts
Subscribed. I've always wanted a 70mm Intruder, Watching with much interest.
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Old Jul 18, 2012, 02:55 PM
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United States, WA, Vancouver
Joined Mar 2012
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had a little delay on the build but now I can go again
laminated the three layer wing last night and drew on the fuse reference lines and sanding guide lines, found a slight scaling discrepancy in my "scale" three view from the side top and front view, so when I started drawing out formers from the front they didnt look right. so right now I am eraseing and amending the nose section and top view of the plans so it will "look" right from the front....
shouldnt take too long and I can start the fuse sections. I should have the wing and tail sanded out tonight.

Joe
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Old Jul 18, 2012, 06:49 PM
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Crystal River Fl.
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Movin right along Joe! Too bad on your set back, I'm sure you'll have it straight right away.. W
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Old Jul 18, 2012, 10:12 PM
Skilled crasher
Ukraine, Kyiv city, Kiev
Joined Oct 2010
81 Posts
One of my favorite planes, together with A-7 and A-10.
What about intakes? Intruder doesn't have big intakes, and especially exhausts, that isn't a problem for a jet, but for EDF it could be.
Also, will it have retracts?
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Old Jul 18, 2012, 10:31 PM
Team EJF >>>WHOOSH>>>
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Joined Jul 2004
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The Intruder is modeled way too seldomly. Looking forward to seeing your progress!

Vic
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Old Jul 19, 2012, 02:04 AM
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United States, WA, Vancouver
Joined Mar 2012
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@ Walt, no big deal just looked a tad "skinny" from the front when I started doing the formers, should look kinda frogish from the front, instead it was looking more lizardish...was easy to fix and didnt affect anything but the front fuse section.

@sashaNar, the intakes will not be scale nor the exhaust, I have yet to see an "exact" scale model of the intruder, least not an EDF. no landing gear, this is just going to be a 50mm park jet belly lander.

@Vic, thanks, I have a set of plans I drew up almost 20 years ago to do this airframe (alot bigger than this one) for slope flying, never did get around to building it. but now-a-days alot of things are possible to build.

just got home from work and off to do the sanding

Joe
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