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Old Jan 17, 2011, 09:52 AM
It wasn't me...
DanSavage's Avatar
Trabuco Canyon, CA
Joined Nov 2000
4,559 Posts
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Savage F-111 Aardvark...

I've been working on my model of the General Dynamics F-111 Aardvark in 1:10-scale. The model will feature a molded fiberglass fuselage as well as molded clear canopy and molded inlet ducts. At this scale, the inlets are the proper cross-section for either two 100mm fans or a single 125mm fan. Wings and tail feathers will be built-up wood.

The most difficult aspect of building a model of the F-111 is duplicating the main landing gear. There have been models built of the F-111 that used non-scale landing gear. I chose to duplicate the real one.

Mine is not a 100% scale rendition. Rather, I chose to duplicate the functionality of the full-size gear using as many off-the-shelf components as possible. This is to reduce the development time and cost as well having replacement parts that are cheap and easy to get.

The video shows the engineering mock-up I built to test different ideas to see what worked and what didn't. The trunnion and connected linkage will be made from 1/8" and 1/4" birch marine plywood, at least initially. If testing shows these to be too weak, then I'll move up to fiberglass sheets.

I'm planning to build the FB-111 instead of the F-111 mainly because I like the way the long-wing version looks more than the short-wing.

Basic Specifications:

Length (fuselage only): 86-1/2" inches
Wingspan (FB-111 - open/swept): 85-1/2 inches / 42-1/2 inches
Wing Area: 1008 sq. in.
Projected Weight: 240-256 oz. (15-16Lbs.)
Projected Wing Loading: 34-36 oz./sq. ft.
Fan Unit: 127mm/100mm (1-Req./2 Req.)
Channels: 6 (tailerons, rudder/nose wheel steering, retracts, wing-sweep, throttle)

Here's a couple of video clips of the landing gear. The first one, shot yesterday, shows the retraction speed after I fine-tuned the air controls.

The second one, shot on Saturday, shows the suspension in action. As you can see from the retraction speed, there is no shortage of power needed to raise the landing gear.

The third video shows the full-scale retraction cycle.

Savage F-111 Landing Gear #4 (0 min 44 sec)


Savage F-111 Main Landing Gear (2 min 9 sec)


F-111 Landing Gear Retraction (0 min 37 sec)
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Last edited by DanSavage; Jan 17, 2011 at 01:16 PM.
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Old Jan 17, 2011, 10:25 AM
2014 EDF JET JAM We be Jamming
Kevin Cox's Avatar
St. Louis Intl, Missouri, United States
Joined Jan 1997
6,773 Posts
WOW!

Awesome Dan.
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Old Jan 17, 2011, 10:45 AM
Registered User
USA, VA, Alexandria
Joined Oct 2004
350 Posts
Looks like a nice start to the project, but one of your RC cars is missing some pieces now. Unless you were really putting your weight on the gear it looks like you will need some heavier springs. Otherwise good luck with the plane.
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Old Jan 17, 2011, 11:01 AM
Build'em and Crash'em
Ken Lapointe's Avatar
Narragansett, RI
Joined Oct 2000
3,167 Posts
That is so sweet. Looks really great.

I'll start saving my money for a kit
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Old Jan 17, 2011, 12:04 PM
It wasn't me...
DanSavage's Avatar
Trabuco Canyon, CA
Joined Nov 2000
4,559 Posts
Quote:
Originally Posted by Kevin Cox View Post
WOW!

Awesome Dan.
Thanks, Kevin.
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Old Jan 17, 2011, 12:12 PM
killickb
killickb's Avatar
The Villages. Florida
Joined Jan 2005
1,271 Posts
That's some gear and I'm sure the airframe that is attached is going to be equally phenomenal, being retired this one is way beyond my piggybank however!
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Old Jan 17, 2011, 01:09 PM
A-4 nut!!
skyhawk's Avatar
Vancouver B.C.
Joined Apr 2002
4,644 Posts
Cool!
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Old Jan 17, 2011, 01:15 PM
EDF Jet Jam May 2014
Robert Belluomini's Avatar
United States, KY, Crestview Hills
Joined Dec 2000
6,393 Posts
Very impressive work!
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Old Jan 17, 2011, 01:19 PM
It wasn't me...
DanSavage's Avatar
Trabuco Canyon, CA
Joined Nov 2000
4,559 Posts
Thanks, guys.

Now that the majority of development work for the landing gear is done, I can start working on the fuselage/inlet ducts.

I did the design work on these before I started on the landing gear. I was just getting ready to get started building the plugs when I realized that it would all be for naught if I didn't have a working landing gear to go with it.

Now I have a working landing gear, so I can get back to work on the rest of the model.
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Old Jan 17, 2011, 01:36 PM
There was a crease in the plan
Steve Haynes's Avatar
Joined Jun 2010
1,332 Posts
That's a masterpiece, love the video.
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Old Jan 17, 2011, 02:57 PM
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Joined Oct 2010
351 Posts
Super Slick Dan.........

how much does the gear weigh?
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Old Jan 17, 2011, 03:23 PM
smithy
jumpy's Avatar
Cornwall, UK
Joined Dec 2004
524 Posts
That gear is 'poetry in motion', is it as heavy as it looks? If the rest is going to be as good as the gear its going to be stunning. Subscribed.

Phil
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Old Jan 17, 2011, 04:40 PM
ooooh yeah
Frenche's Avatar
Ballarat, Victoria, Australia
Joined May 2004
1,582 Posts
Wow there are a few F-111's getting around today, not that that is a bad thing. Dan that gear is a work of art! I'm curious as to which car you nicked the A-arms and hubs from, looks like 1/10th scale off road truck or buggy.

Now if only I could replicate this gear in my twin 50mm build, I thought it would be just about impossible so settled for hand launch/belly land
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Old Jan 17, 2011, 05:13 PM
shut up & fly
hoser's Avatar
United States, FL, Miami
Joined May 2001
3,806 Posts
like how friging amazing is that! Dan what an awesome job, and what an awesome project you just set the bar out of da park!

props!
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Old Jan 17, 2011, 05:22 PM
Big gov never Works
St. Martin's Avatar
Skunk Water, Rhode Island
Joined Jul 2002
12,303 Posts
WOW..talkn' heavy metal here, Dan! Simply awesome!

Fuzz
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