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Old Jun 22, 2004, 08:46 AM
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meteor's Avatar
Ontario, Canada
Joined Nov 2002
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Wattage F-22 with mixed surfaces & 208 watts/lb!! (video)

Here's a really effective modification of the Wattage F-22 using "linked" surfaces a-la the Wattage F-86.


This mod makes for much more roll authority (speed) and removes the noticeable axial-roll "wallow" that the fully-flying stabs had. (the nose tended to follow a small circle in a roll)

Also, the stock set-up always had some slop in the linkages to the stabs, so this would mean that it was always hunting a little in roll, as the surfaces twitched with varying aerodynamic loads. This set-up is rock-solid


Other benefits are substantial weight savings from the tail by removing all the useless linkages and servo mounts, as well as moving the servos closer to the CG, making balancing easier. (or to add a larger motor!)


This model uses a Mega 16/15/4, APC 6x5.5 and a 3S1P 2600mAh Poly-Quest pack.

It pulls about 27A static (270W!), and the AUW is a hair over 20 oz.


This ship gives new meaning to "vertical" performance! (you can punch it from a near-stall, and it will accelerate vertically 'till it's a dot!)



Here's a video (more to come, this one is kind of repetitive!)

http://meteor.rchomepage.com/mig-15_f-22.wmv


Fun!
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Old Jun 22, 2004, 12:55 PM
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awesome vertical performance and rolling rate.

few questions:

1/ can the 2600 fit in the F22 cockpit? (spelling)
2/ I doubt those two tinny servos will stand the torque on both 4 control surface for very long?
3/ are those control horns from GWS?

I love the Video, great.

Thanks
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Old Jun 22, 2004, 02:09 PM
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NorCal Silicon Valley
Joined Aug 2002
11,779 Posts
wow very axial!


Barry
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Old Jun 22, 2004, 02:18 PM
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meteor's Avatar
Ontario, Canada
Joined Nov 2002
1,568 Posts
Answers...

Yup, the 3S 2600 Li-Po easily fits under the canopy by cutting a slightly deeper (3/4") channel in the existing battery bay.


I think a lot of people overestimate how much torque is actually applied by aerodynamic forces...

These "normal" hinged surfaces will load the servo far less than the stock arrangement of a fully-flying stab, and don't forget that the Wattage manual suggests CS-10 (GWS Pico) servos for the flying stabs!

We intentionally used very thin music wire to allow a little bit of flex under extreme load situations. (sort of a "servo-saver" effect) Also, music wire is hardened so it'll flex and bounce back without permanently bending.


Yes, the aileron horns are stock GWS horns, and the elevator horns are Robart "hinge-points", kind of overkill, but it's all we had!



All in all, very successful.
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Old Jun 22, 2004, 08:56 PM
RC-Nut-Job!
Lv2Fly's Avatar
New York
Joined Jul 2001
970 Posts
very very nice.....
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Old Jun 22, 2004, 09:53 PM
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wow... very very impressive....

Paul
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Old Jun 22, 2004, 10:52 PM
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Wohohooooo! Nice. Must be lotsa fun. JT
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Old Jun 22, 2004, 10:55 PM
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darren jakel's Avatar
Maricopa, AZ
Joined Jan 2004
336 Posts
Awesome plane and Video Meteor! I have one of these sitting in the closet waiting to be built. I got an astroflight 020 direct drive system in trade and thought this would be the perfect plane for it. I may have to bump it up a notch or two on the priority list after watching the video.

Darren
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Old Jun 22, 2004, 11:19 PM
Tight is Right
Darren Hintze's Avatar
Lehi, Utah, United States
Joined Dec 2001
7,668 Posts
I just pulled my very similar set up off the line (after 323 wonderful flights) and am converting it into a semi-scale F-35 with a single 65mm fan (Wattage housing probably with a Kyosho rotor cut down).

I was flying 3s with a 5T though at about 180W on a 6.5x6.5. Mine would not quite go unlimited veritcal and wasn't as fast. I decided to go EDF with the new batteries coming out though.

Awesome plane Meteor.

I need to get another one of these airframes though before they disappear. I paid $22 for mine used as a Christmas present 18 months ago. Needless to say it was far and away the best bang for the buck I've ever gotten in 15 years of RC flight.


Darren
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Old Jun 23, 2004, 12:25 AM
My cat up close
bipeflyer's Avatar
England
Joined Feb 2001
4,021 Posts
My God, that is quick!
Worthwhile modifications I'd say,interested in the prop size too, might give it a go over the 6 X 4 APC prop in my mini Cat,which has a pretty much identical power train to yours, except my AUW is 35 oz..

20 oz, it's got to be a winner, and it shows in the video!
Nicely done,

Matt
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Old Jun 23, 2004, 12:44 AM
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NorCal Silicon Valley
Joined Aug 2002
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I just buy them by the parts now. I have a template for the wings that came from my Wattage Mirage(same wings) so I just buy the bodies and make my own surfaces.

Barry
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Old Jun 23, 2004, 01:00 AM
My cat up close
bipeflyer's Avatar
England
Joined Feb 2001
4,021 Posts
Barry- subliminal message follows:
B-U-C-C-A-N-E-E-R, repeat over and over to yourself 5 times an hour.......

I had a Wattage F-22 and sold the kit- kinda wish I hadn't now!
Good idea on just buying the parts and cutting the rest though.

Mat
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Old Jun 23, 2004, 01:22 PM
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Folks;

It sounds like Wattage again is pulling the plug on the F 22? Is it true?
Gosh... what the hell are we going to?
First, they killed their mirage 2000 (one of the best pusher jets out there)
Now, they are pulling the plug on the F 22
I am confused? Are we supposed to fly Slowsticks, Piper Cubs only???
If it is true then This world is becoming very weird???
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Old Jan 20, 2005, 11:17 AM
a really nice guy, really
Ralph Brekan's Avatar
Phoenix Intl, Arizona, United States
Joined Jul 2004
3,200 Posts
Man. I wonder if I can do this to mine w/o messing it up
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Old Jan 20, 2005, 12:33 PM
Scotty..more power!!
Aero-Nuts's Avatar
Pakenham Ontario, Canada
Joined Oct 2003
45 Posts
If you want to see a little more video of that ship go here ...

http://aircraft-world.com/prod_datas...cer/bl4-15.htm

and click on the "3-turn motor in a F22 foamie pusher jet" link (BL4-15-3, PQ-2600-3S, GR 5.5x4.5 speed prop). I needed a test bed for the motor..
This test was done with Polyquest 10C batteries, I would like to put some new 12C to 16C into this and "prop up". Over 310 to 410 Watts should really make her "Scoot"

If you are wondering why I am replying to this thread... Meteor helped me get this uploaded to the groups...I'm not a big poster
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