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John Deere

Old 03-20-2009, 02:05 AM
  #1  
baco
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Default John Deere

Hi All

This is my new design, and I call it John Deere, for obvious reasons...

Main pieces are cutted, and this weekend I will asemble all . Maybe next weekend for maiden flight.
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Old 03-20-2009, 02:46 AM
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Larry3215
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I want to see this one fly
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Old 03-20-2009, 02:51 AM
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Subscribed! This is gonna be good!
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Old 03-22-2009, 11:21 PM
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Default building advance!

These are the last photos taken today. Jhon Deere is growing very fast. Itīs really a tail less-biplane with enormous rudders !. Front gear may be functional with a pair of low weight tires and two little hidden at the tires-rudders. My club hasnīt grass and here is a desertical place and grass is hard to find so tires are mandatory.
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Old 03-23-2009, 01:32 AM
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I like it !!!!!
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Old 03-25-2009, 12:12 AM
  #6  
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Just a new photo. Added in front the wheel support (black) and support for upper wing. I promise CAD plans in anybody is interested in a copy.
Today added front false-wheels and did a short hand launched flight. The thing did a soft left turn and landed softly over its left side.
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Old 03-31-2009, 10:58 PM
  #7  
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Default New building report

Last weekend put my 600 g Dualsky motor with a 9x4.5 propeller of its front and without any other command try some cart over my houseīs floor.
First problem was some vibration, i must reinforce front "fuse" area, to avoid it.
Second was when she was moving, left front false-tire failed to avoid torque and she falle dover its letf side cracking center wing stiffeners. It was easily solved with a sherbet acting like a fixed axle.
Next step is to reinforce motor area and put radio equipment. Finally it will do its maiden flight.
Is not planned to take off, but using a launcher itīs a good idea.
Regards
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Old 04-02-2009, 03:35 AM
  #8  
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Wow that is cool .I wish I had one
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Old 04-04-2009, 01:54 AM
  #9  
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Default Just advance

Maiden flight is this weekend !!!
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Old 04-04-2009, 02:49 AM
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Originally Posted by baco View Post
Maiden flight is this weekend !!!
Good Luck!
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Old 04-04-2009, 10:37 AM
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This should be interesting good luck to you on your maiden flight, Chellie
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Old 04-08-2009, 08:21 PM
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Unhappy

No maiden flight yet, I suffered a minor accident at home (fall from the ceiling) without any serious injuries.
Maiden comes next friday .
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Old 04-08-2009, 10:58 PM
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I hope it was the John Deere that fell from the ceiling. If it wasn't then what are you doing hanging from the ceiling?
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Old 04-08-2009, 11:55 PM
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Originally Posted by baco View Post
No maiden flight yet, I suffered a minor accident at home (fall from the ceiling) without any serious injuries.
Maiden comes next friday .
Mine didn't do as well,,,,,,, bub steve
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Old 04-09-2009, 02:35 AM
  #15  
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I suppose itīs a mistake, I was walking over the roof, and fall 3 meters. Was enough lucky to fall over my enormous vine plant wich protect me!
No injuries at all, very Lucky!
Daniel
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Old 04-09-2009, 02:44 AM
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Originally Posted by baco View Post
I suppose itīs a mistake, I was walking over the roof, and fall 3 meters. Was enough lucky to fall over my enormous vine plant wich protect me!
No injuries at all, very Lucky!
Daniel
I'm glad your OK! 3 meters is a high-dive at a Pool!
I think your a out-side-the box kinda guy and I like ya!!
We have a few here but your John-deere is way to cool, your bub, steve
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Old 04-09-2009, 04:14 PM
  #17  
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you are lucky! or should I say were.... I hope you didn't use up all your luck for the year causing your deere plane to crash and burn (literally)....

whatever you're doing on the roof, be more careful! not enough scratch building RC people as it is! make sure you post tons of pics or a vid if you can from your maiden!
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Old 04-10-2009, 11:07 PM
  #18  
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Default Maiden flight

Today, early in the morning we did our first attempt to fly the John Deere. The model show in three short flight strong tendence to flight as tail heavy. CG was located at the leading edge of lower wing. Seems therīs another thing that works wrong, may be the front of the model wich acts as an canard surface. Other problem seems to be motor positive incidence (Hydrofoam flies in this way...)

I still working on this plane.

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Old 04-11-2009, 02:02 AM
  #19  
iflyrc1012
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o.k . . . a wealth of info gained from that flight!!
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Old 04-11-2009, 06:14 AM
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Looks to me like you're almost there It didnt look all that tail heavy. I tink its a thrust and drag issue more than tail heavy.

Id guess you need a lot less up thrust or maybe even some down thrust. With that hi wing your center of drag is probably above the motor center line, so a little down thrust might even be in order.

On most hydro's you need the up thrust because the center of drag is below the motor thrust line.

Id also recommend a larger diameter prop if you can. It looks like the tractor 'grill' is blocking a lot of the thrust. Maybe open up the grill some behind where the prop arc is if you cant spin a larger prop.

You're close and its very cool
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Old 04-11-2009, 12:19 PM
  #21  
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That's awesome!
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Old 04-11-2009, 12:59 PM
  #22  
baco
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It looks like the tractor 'grill' is blocking a lot of the thrust.
Larry
I agree with your comment, and the "grill" is also suspictious of make some effect as a canard, cause itīs not an anlge of 90š as you can see in some phots of construccion process.
This grill and motor are the main differences with this model and a prototype build in paper time ago whic has no bad tenedences.
Modifications to come are:

-not more front "grill"
-negative incidence in motor.

This is the first crash flight..
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Old 04-11-2009, 01:25 PM
  #23  
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is it tail heavy? great job and good luck..............I want one
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Old 04-11-2009, 07:21 PM
  #24  
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my 2c worth. . . i think larry's right about the grille blocking alot of the propellers thrust and maybe it needs a bit of downthrust and right dialed in?? but i gotta tell you. . .
I LOVE THIS CONTRAPTION!! don't give up on it. it will fly.
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Old 04-12-2009, 03:01 AM
  #25  
baco
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Did some changes, cleaned the grille and itīs a very noticeable change...it accelerates very fast at home floor !
Also add negative incidence and need to cut an slot for prop clearance at me front false tires. When testing saw that with motor at max rpms the foam distorts, changin the incidence to the positive side.
So add an stiffener in carbon fiber.
Tomorrow new flights.

Thanks to all for your help
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