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jhughes
Charter Member
6 posts		 Nov-20-06, 04:54 PM (CST)
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"Wing gap"
 
   I am working on cabane struts. I just made some and found out they are not right. twelve hours work and 8 feet of streamlined steel turned into junk arrrggg! I have checked the prints and asked around but no one seems to be able to tell me how the 50 inch gap is measured. Randy Brooks says he thinks it is the bottom bolt hole of the bottom spar attach point to the top bolt hole of the wing spar attach point but he wasn't sure as he didn't have the prints handy. On print 11 it shows on the upper left hand side that the spar bottom should be 2 feet 3 inches above the top longeron to the bottom of the spars of the upper wing but that only gives me about 47 inches gap between the top of the bottom wing to the bottom of the top wing. Without a certain mesurement this is an exercise in frustration. As I said I have scoured the prints but can find no mention at all of a gap of any size, 50 inches or otherwise, let alone where the measurement is made from. Since there are plenty of Hatz's out there flying someone smarter than I must have figured it out. Any help would be greatly appreciated.
j hughes



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  Subject     Author     Message Date     ID  
  RE: Wing gap Ser248 Nov-21-06 1
     RE: Wing gap jhughes Nov-21-06 2
         RE: Wing gap RonB Jan-20-07 3
         RE: Wing gap Fiesty Jan-20-07 4
             RE: Wing gap Ebby37 Jan-22-07 5
                 RE: Wing gap MTaylor Jan-22-07 6
         RE: Wing gap Jim Pinkerton Jan-22-07 7
             RE: Wing gap MTaylor Jan-23-07 8
                 RE: Wing gap Ebby37 Jan-23-07 9

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Ser248
Member since Sep-16-04
64 posts		 Nov-21-06, 05:49 AM (CST)
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1. "RE: Wing gap"
In response to message #0
 
   Let's see...... wing gap....
Seems to me I found a measurement from a point on the fuselage to the center section that gave me the hight I needed. I then set up the top wing to be straight across. I bolted the bottom wings onto the fittings on the side of the fuselage, measured the dihedral angle, propped the ends of the lower wings up with saw horses and such and cut and fit the interplane struts..... honestly couldn't tell you what the gap is. It flies.... I'll look at my prints and measure some stuff and report back.
Jeff Moore


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jhughes
Charter Member
6 posts		 Nov-21-06, 01:47 PM (CST)
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2. "RE: Wing gap"
In response to message #1
 
   Thanks jeff

As I said it has been an exercise in frustration. I have the 2'3'' measurement on the upper right hand side of print 11 that appears to go from the top longeron to the bottom of the spar and that is the only measurement I can find Jim Phillips mentioned a 50 inch gap in a forum thread in August 2005. I am leary and just want to do this right. I appreciate any insight on this.
Thanks

J Hughes


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RonB
Charter Member
104 posts		 Jan-20-07, 10:18 AM (CST)
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3. "RE: Wing gap"
In response to message #2
 
   J Hughes

I've been off the forum for quite some time and just noticed your post of last November asking for windshield frame patterns.

I would be happy to send you a set if you still need them.

E mail me at n693w@comcast.net

Ron B


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Fiesty
Charter Member
10 posts		 Jan-20-07, 03:42 PM (CST)
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4. "RE: Wing gap"
In response to message #2
 
   JHughes--

Us the 50 inches. It does not make a lot of dfference. I added 3" to give more room to get into cockpit.


Randy Brooks


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Ebby37
Member since Nov-3-06
22 posts		 Jan-22-07, 03:20 PM (CST)
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5. "RE: Wing gap"
In response to message #4
 
   How does increasing the gap to 50 inches impact the flying wire dimensions?

Ebby
Hatz Classic 037
A work in progress.


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MTaylor
Charter Member
395 posts		 Jan-22-07, 05:45 PM (CST)
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6. "RE: Wing gap"
In response to message #5
 
   The first thing I'll say is that before anyone orders flying wires, assemble the centersection & wings to fuselage, set dihedral, then measure for wire lengths. Having said that, wires come with a little give in their dimensions because the threads run a couple of inches on each end. The give isn't a lot. Raising the centersection from plans height WILL increase the length some what. Some one smarter than me with geometry calculations may be able to triangulate the lengths to order. I assembled mine (which are to plans, basically) and measured. The lengths were all close enough to go with the plans lengths.

The best reason for being able to order a standard length is so that several orders can be made. 5 orders saves about 25% off the price. That's several hundred $.

If you plan to pay full price, it's a non issue. If you can get a bulk order together, it's a great deal.

Mark T


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Jim Pinkerton
Charter Member
36 posts		 Jan-22-07, 06:39 PM (CST)
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7. "RE: Wing gap"
In response to message #2
 
   I was out to the airport today and brought my plans home. Got my pictures out and notes and you are correct about the 27" mesurement from the top of the longeron to the bottom of the spar. I had my center section all made up and built a bridge work to hold it in place and cut the tubing to fit. Ofcourse the fuselage has to be level both ways and then with 1/16 cable and turn buckles adjust it tell you get it perfect. I than run a ratchet strap over the whole thing to secure it while cutting the tubes. I had never heard anything about the 50" mesurement. One clue I used when setting the wings up was a 4' level and a bock of wood 1 27/32" under the inboard end of the level, this will give you 2deg's. in the lower wing. I mesured everything also before ordering the wires and they all aggreaded with the prints. One way also is to not make up the lugs for one end untill you get the wires. Jim


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MTaylor
Charter Member
395 posts		 Jan-23-07, 09:52 AM (CST)
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8. "RE: Wing gap"
In response to message #7
 
   Good point, Jim. The straps from the wings that the wires attach to and the roll wire attach points could be made with longer lengths and the ends not finished out until the lengths are known what they need to be to fit standard wires, then the ends cut off and the doublers welded on (before fabric and with obvious caution if they can't easily be removed). I say this as an idea that hasn't been tried or checked against actual working conditions, just thinking about it at work and away from the real thing to check against.
If someone did have a need for longer wires and wanted to get in on a bulk standard order, this could save a bundle.

Mark T


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Ebby37
Member since Nov-3-06
22 posts		 Jan-23-07, 08:33 PM (CST)
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9. "RE: Wing gap"
In response to message #8
 
   I was in on the last bulk wire order. That's why I asked the question I did. As a first time builder it's most prudent for me to stick close to the dimensions in the plans.

Ebby
Hatz Classic 037
A work in progress.


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