RE: Gary Allen 33% Bücker Jungmeister  
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RE: Gary Allen 33% Bücker Jungmeister - 4/1/2008 2:32:41 AM   
CharlieK


 

Posts: 63
Joined: 1/12/2003
From: Laramie, WY, USA
Status: offline 		Hi Ken,
Finally made it back to the Jungmeister. Have the lower center section mounted on the fuselage, and finished the upper center section tonight. I have a question - when you moved the wing pins from the center to the wings how did you reinforce the pin mounting? With the plywood strip running down the rib on the outer panel it will not have much to grab to. I am thinking about just adding a 1/4 balsa rib against the first rib so the pins have some support. Also I am considering using 1/2 in. streamlined tubing over the cabane struts - might beat the heck out of building them up from balsa and should weigh less. Something else, did you make the center section flying wires functional - they are not shown on the plans - I am doing so and starting to work on how to mount them.
Have Fun
Charliek

(in reply to Big_Bird)
       Post #: 576

RE: Gary Allen 33% Bücker Jungmeister - 4/1/2008 4:48:10 PM   
Big_Bird



Posts: 3171
Joined: 12/18/2001
From: Arlington, TX, USA
Status: offline
quote:

ORIGINAL: CharlieK

Hi Ken,
Finally made it back to the Jungmeister. Have the lower center section mounted on the fuselage, and finished the upper center section tonight. I have a question - when you moved the wing pins from the center to the wings how did you reinforce the pin mounting? With the plywood strip running down the rib on the outer panel it will not have much to grab to. I am thinking about just adding a 1/4 balsa rib against the first rib so the pins have some support. Also I am considering using 1/2 in. streamlined tubing over the cabane struts - might beat the heck out of building them up from balsa and should weigh less. Something else, did you make the center section flying wires functional - they are not shown on the plans - I am doing so and starting to work on how to mount them.
Have Fun
Charliek

Hi CharlieK. I don't remember how I reinforced the dowel pin hole but it should be real easy with a small piece of 1/8" plywood. I used the K&S streamlined aluminum for the inter plane struts. The center section flying wires are not functional. The wire that goes into the fuselage just floats. Here is a photo.

This doesn't have a lot of relevance here but I would like to show you how I made the struts for my Waco YMF-5. These use Glenn Torrence Models #2001 strut material. http://www.rcuniverse.com/forum/m_3938241/mpage_22/key_/tm.htm

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< Message edited by Big_Bird -- 4/1/2008 4:57:58 PM >

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Ken
WACO Brotherhood #70

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RE: Gary Allen 33% Bücker Jungmeister - 4/4/2008 4:08:17 PM   
rabacon



Posts: 129
Joined: 8/22/2002
From: Wonder Lake, IL,
Status: offline 		CharileK, I ended up making my center section support wires functional because at the time the aluminum struts seemed weak side-to-side. Ken's appears plenty strong as it is a proven flier so I probably didnt need to do so. Here is a link that shows mine at that stage if you are still looking to do so. Good luck on your build. I am still waiting for the weather to warm so I can paint mine. 40degree and rain is what we got here

http://www.chainolakeseagles.com/modules.php?name=Forums&file=viewtopic&t=65

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RE: Gary Allen 33% Bücker Jungmeister - 4/4/2008 7:53:55 PM   
CharlieK


 

Posts: 63
Joined: 1/12/2003
From: Laramie, WY, USA
Status: offline 		Hi,
Thanks for the info, that should work very well to stiffen it up. I am going to finish the wings and rig the center section with them installed (somehow). I know from previous experience that if the top wing is not perfectly square with the bottom at the tips the stall characteristics are interesting to say the least. On my Pica airplane we ran a rigging check before every flight to eliminate the problem. Should be fun rigging the airplane with the wings installed but I hope it will come out better. I also have another question - I am planning on installing an FPE 4.2 and am trying to figure out if I can remove the velocity stack without changing the engine run characteristics. If it looses a little power on the top end it will be ok, but I am concerned about it quitting in the air (prairie dog holes and sagebrush are not good places to land ? Actually I am thinking of taking it to colorado for the first flights to eliminate the problem. You are much warmer than us, we are still getting down to 5-15 at night, and you probably heard about springtime in the rockies in the news. I80 and I70 were both closed for at least a day at the same time. Trucks parked all over the place, what a mess. What are you going to paint yours with? I haven't decided on a color scheme for sure yet, but doubt it will be yellow. At the rate I am progressing won't have to worry about it for a year or so anyway.
Charliek

(in reply to rabacon)
       Post #: 579

RE: Gary Allen 33% Bücker Jungmeister - 4/4/2008 8:14:33 PM   
rabacon



Posts: 129
Joined: 8/22/2002
From: Wonder Lake, IL,
Status: offline 		When you cut your ribs the ply root ribs are cut in pairs and drilled for locating pins in pairs. Keep these pairs together during the process and there is no need to rig the center section with the wings attached. If the incidence and alignment of the upper and lower center sections are properly set the wings will follow automaticly. Besides, where the wings attach to the center sections there is no strength at all without all of the wires and struts, basicly one big house of cards, and I cannot imagine trying to fit the center section with the panels flopping around unsupported. This sucker gets big fast when those panels get bolted on. Gary Allens mag article construction steps work well. Your call. I am painting with Krylon as I dont need a custom color. Will shoot a clear satin topcoat when all is done. Here is my scheme, pretty simple and clean.

http://wp.scn.ru/en/ww15/o/141/2/0/5

Not an engine guru, I have stacks on some, none on others. All run fine. They do keep the fuel from blowing down the side of the fuse though.

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RE: Gary Allen 33% Bücker Jungmeister - 4/5/2008 2:16:02 AM   
CharlieK


 

Posts: 63
Joined: 1/12/2003
From: Laramie, WY, USA
Status: offline 		I looked at the Waco web site Ken, beautiful looking airplane. I would be leery of using aluminum for the strut pins if you are going to fly aerobatics, it is very weak in shear loading and would really load up the rest of the structure to take up the slack. That why we use all those rivets on full scale. I got an answer back from FPE, the engine should run fine with no stack. I may still use Gary's method of putting the wings on, it will be a make it up as I go thing. I am still thinking about jigging the whole thing up and doing it all together. I have enough weights ( bricks) to keep it all aligned I think. It worked for the Extra I built but it only had two wings to deal with. I am planning on using dope on mine, kind of hung up on airplane stuff for airplanes. My wife will make me paint it outside though, can you imagine how high you could get painting this thing in the house . Would also kill your liver if I've still got one after working on airplanes for 55 years.
Charlie k

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RE: Gary Allen 33% Bücker Jungmeister - 4/6/2008 1:59:02 AM   
Big_Bird



Posts: 3171
Joined: 12/18/2001
From: Arlington, TX, USA
Status: offline 		Dope is good. Just don't inhale.

I wanted to let you guys know what a great time I had today flying the Jungie. I have never gotten board with it. What a wonderful design.

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RE: Gary Allen 33% Bücker Jungmeister - 4/7/2008 3:32:37 AM   
Jennyboy


 

Posts: 9
Joined: 10/18/2007
From: Brampton, ON, CANADA
Status: offline 		Hi Ken. Could you tell me where you got those 'Y' fuel fittings in your Jungie.I've looked everywhere and can only find the 'T ' fittings.Dobro makes something that looks like them but one of the ports is a plug.Jennyboy

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RE: Gary Allen 33% Bücker Jungmeister - 4/7/2008 3:48:32 AM   
Big_Bird



Posts: 3171
Joined: 12/18/2001
From: Arlington, TX, USA
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quote:

ORIGINAL: Jennyboy

Hi Ken. Could you tell me where you got those 'Y' fuel fittings in your Jungie.I've looked everywhere and can only find the 'T ' fittings.Dobro makes something that looks like them but one of the ports is a plug.Jennyboy

I really don't remember. Probably an auto supply.

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RE: Gary Allen 33% Bücker Jungmeister - 4/10/2008 7:34:31 PM   
CharlieK


 

Posts: 63
Joined: 1/12/2003
From: Laramie, WY, USA
Status: offline 		hi guys,
someone had asked about the man plans being available. I just found a site called aerofred.com on google which has the plans listed as available for free. might be a good place to check out.
charlie

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RE: Gary Allen 33% Bücker Jungmeister - 4/10/2008 7:48:41 PM   
Big_Bird



Posts: 3171
Joined: 12/18/2001
From: Arlington, TX, USA
Status: offline 		Cute Jungie.

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Ken
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RE: Gary Allen 33% Bücker Jungmeister - 4/19/2008 9:14:01 PM   
skylarkmk1



Posts: 1119
Joined: 9/25/2004
From: Festus, MO, USA
Status: offline 		Guys,

For those of you who don't get or haven't seen it, the British magazine "Flying Scale Models" in the March 08 issue (volume 10, No. 100) has 3 articles on the Bucker Bu 133 Jungmeister. Article 1 is a general history, Article 2 is 2 pages of three views with cross sections and Article 3 is a series of closeup pictures covering details of the plane. Web site is www.flyingscalemodels.com

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RE: Gary Allen 33% Bücker Jungmeister - 4/19/2008 9:18:09 PM   
Big_Bird



Posts: 3171
Joined: 12/18/2001
From: Arlington, TX, USA
Status: offline 		Thanks John.

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Ken
WACO Brotherhood #70

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RE: Gary Allen 33% Bücker Jungmeister - 4/28/2008 10:40:29 PM