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Author Topic: "ShedDoor" for .020 (5-1-07 new pics)  (Read 3078 times)

Offline minnesotamodeler

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"ShedDoor" for .020 (5-1-07 new pics)
« on: April 26, 2007, 07:17:18 PM »
Here's a little something I threw together just for fun...gonna try it in my backyard again.  "ShedDoor", a BarnDoor sized for .020.  Last pic shows it with its big brother (.049 size).  Original is 24" wingspan; shrunk version is 18".  Original is around 6 oz.; shrunk one looks like it'll be under 3 RTF.

Larry, there's your modified tank, haven't got an external tank on yet.

--Ray
« Last Edit: May 01, 2007, 03:59:23 PM by minnesotamodeler »
--Ray 
Roseville MN (St. Paul suburb, Arctic Circle)
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Offline frank carlisle

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Re: "ShedDoor" for .020
« Reply #1 on: April 26, 2007, 07:21:53 PM »
Hey!! I found it Ray. Boy is the Sheddoor ever cute!! Trim the tree before you try it out.
Frank Carlisle

Offline minnesotamodeler

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Re: "ShedDoor" for .020
« Reply #2 on: April 26, 2007, 07:48:03 PM »
Lessee, seems like you were gonna bring the LA Heat up here and buzz it off for me...
--Ray 
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Offline LARRY RICE

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Re: "ShedDoor" for .020
« Reply #3 on: April 26, 2007, 08:57:25 PM »
I sent one of my combat wings over to Flying models for testing, the guy completrly re-designed it to use a .020 engine on it and never said how it flew. Wasted a good 1/2a plane.
Larry

Offline minnesotamodeler

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Re: "ShedDoor" for .020
« Reply #4 on: April 27, 2007, 03:38:19 PM »
Shoulda sent it to me, I'd tell you, and tell you, and tell you...and I'd be more likely to put one of my .061s on it than an .020!
--Ray 
Roseville MN (St. Paul suburb, Arctic Circle)
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Offline minnesotamodeler

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #5 on: May 01, 2007, 04:05:43 PM »
New pics...ShedDoor ready to go, 3 oz. RTF.  Floppy balloon tank grafted onto the side, if it works well I'll design a place for it next time.  18" span, 90 sq. in. area. (30 sq. in./ounce, for those keeping track). That's a 4.5x2 prop currently on it. 

--Ray
--Ray 
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Offline minnesotamodeler

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #6 on: May 07, 2007, 05:46:30 PM »
OK all, I flew the little beastie...flew OK but a little noseheavy feeling.  The floppy tank worked perfectly; gives about a 3-minute run although I didn't actually time it--makes a flight plenty long on 15' lines! I stuck some weight on the tail and it flew better, figure eights, inverted flight, etc.  So now I'm gonna shorten the nose a little, put a little more offset in the engine while I'm at it, and make an official-looking receptacle for the tank! All in all, it can be counted a success.

The .020 ran fine; these things seem more forgiving than the .049s!  Starts easily, runs steady, no problems at all.

--Ray
--Ray 
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Offline Robert McHam

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #7 on: May 07, 2007, 11:17:26 PM »
My first Pee Wee .020 I ever had was a second hand job that came out of a Cox Li'l Stinker and boy was it sludged! Whoever owned it before I got it must have just let all the fuel sit in it. I took it apart and it smelled awful and it was all green inside. :o
After careful cleaning and assembly it started right away! It always ran great and started easily. Wish I still had it.

Ray it looks awesome! Keep up the good work!

Robert
Crop circles are simply open invitations to fly C/L!

Offline minnesotamodeler

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #8 on: May 08, 2007, 08:06:26 AM »
Thanks Robert; I'm kinda impressed with the .020s--don't know why they quit making them.  Maybe Cub could be talked into putting out a 1/4A version of their new reed valve engine.

--Ray
--Ray 
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Offline Clancy Arnold

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #9 on: May 14, 2007, 07:42:45 PM »
Ray
I just noticed that you are not using a starter spring on the PeeWee .020.
How do you get it started the right way each time?
Clancy
Clancy Arnold
Indianapolis, IN   AMA 12560 LM-S
U/Tronics Control
U/Control with electronics added.

Offline minnesotamodeler

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #10 on: May 15, 2007, 08:42:25 AM »
Simple, Clancy...I don't!  This particular engine is better than most; it starts frontwards probably 75% of the time.  I keep a towel handy to kill it with. I have another that isn't nearly so reliable; I do use a spring starter on it, which works 100% of the time. I have one on the Queen Bee.  I just basically dislike fiddling with them if I don't have to.

Got the ShedDoor rebuilt, modified for the external tank, shorter nose, paint drying as I type this.  Looks m-u-u-u-c-h better than the pics above.  If wind dies down I can fly it in the next day or two. 

--Ray
--Ray 
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Offline LARRY RICE

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #11 on: May 15, 2007, 09:46:47 AM »
Ray,
          Generally the engine starting backwards more often than forward (40% or more) is caused by the prop placemant on the crankshaft. The usual cure is to remove the prop, rotate it a quater of a turn and remount.  H^^
Larry

Offline minnesotamodeler

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #12 on: May 15, 2007, 04:29:55 PM »
Huh...really.  I'd never heard of that before, I wonder why not?  Cox guys like to keep their secrets I guess...I will try that next time one of my engines gets stubborn.  Thanks for the tip Larry.

--Ray
--Ray 
Roseville MN (St. Paul suburb, Arctic Circle)
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Offline minnesotamodeler

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #13 on: May 16, 2007, 08:09:46 AM »
Latest pics of my modified ShedDoor, incorporating the shorter nose and tank accommodation.  Will fly today if the wind stays down.

Notice how the wheel cleverly matches the airplane finish.

--Ray
--Ray 
Roseville MN (St. Paul suburb, Arctic Circle)
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Offline frank carlisle

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #14 on: May 16, 2007, 05:51:50 PM »
That wheel is awesomely clever Ray. I'm happy to see you are having so much fun with that .020. 15 foot lines!! wow.
Frank Carlisle

Offline minnesotamodeler

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #15 on: May 17, 2007, 02:40:03 PM »
OK cats and kiddies, I just got in from the backyard flying the ShedDoor in its new configuration.  Balance is good, still grooves but capable of turning smaller loops.  I flew it a few times with the prop backward, it definitely slows it down.  After I was pretty comfortable with loops and lazy eights I turned the prop frontward again to get the speed into a better range for the plane (it is a flat-plate wing, after all).  It makes it a little fast if you just go around in circles (remember,15' lines) but perfect for inside/outside loops, eights, etc. where you can stand still and watch it.  I even got an overhead eight out of it, sort of accidentally and actually backward--went up really high to do an outside loop, which turned tighter than I expected and back at the top of the loop it was nearly overhead, so I says to myself, "well, shoot, go for it", and pulled "up" into it and made the inside half on the other side. Stayed up there OK.  I also get a very satisfying echo off the garage wall as the plane passes within 2 feet of it.

 Last flight, I even managed to glide it to the patio and make a nice landing on the concrete.  Figured at that point I better quit while I was ahead.  So I walked the dozen feet back to my back door, put up the stuff, sat down here and started typing this msg.  I love it--any time I have 15 or 20 minutes I can run out there and get in a flight!

The engine gave me a little more trouble this time, insisted on being set rich each time before it would start, didn't run as steadily as it had before, didn't want to hold an exact needle setting.  I had taken the tank off to turn it to its present sidewinder configuration, so I suspect the gasket isn't sealing up as well.  A crankcase leak would cause all that I think.  Anyhow, guess I'll try the silicone bead trick. 

Now I've got a head full of designs I want to try on this scale...Somebody stop me!

--Ray
--Ray 
Roseville MN (St. Paul suburb, Arctic Circle)
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Offline Robert McHam

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #16 on: May 17, 2007, 11:21:33 PM »
Very nice indeed #^.

Another advantage of using a remote tank for this engine is the fact you can now not worry about the position of the backplate! As I have seen in the pics, you are now able to position the needle valve to a convenient location that also keeps it relatively safe from harm.

Robert
Crop circles are simply open invitations to fly C/L!

Offline minnesotamodeler

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Re: "ShedDoor" for .020 (5-1-07 new pics)
« Reply #17 on: May 18, 2007, 07:06:27 AM »
Yup, no more worries about vents leaking, etc.  --the floppy tank feeds the same upright or inverted, too, "down to the last drop" as they say.  One less complication--simpler is (nearly always) better.

Wait'll you see what I've got on the drawing board next.

--Ray
--Ray 
Roseville MN (St. Paul suburb, Arctic Circle)
AMA902472


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