Conference vmszoo::rc

Bob, you've gotten hooked on a very addictive pastime...the making and 
flying of those little buggers is indeed a fine art.  I suggest that 
you find the local free flight club and get them to steer you to the
HLG types in your area.  Nobody else will understand you.  You won't 
find anything in RCM, for sure.  Look to MA or Flying Models.

If you want to contact me offline, I have some plans for some HLGs that
have been published in the last couple of years.  I don't fly HLG myself,
but I play with the next cousin, the solid balsa rubber powered models.

        I'm not that much into HLGs themselves, I just need to learn the
        stuff to spin off into my model rocket gliders. I've successfully
        stolen some of the composite construction techniques, but haven't
        mastered the fine art of trimming and launching them yet. 
        
        I too have several plans from years of MA, and many other sources.
        I'd be interested in any others you've got. 

        This weekend I did a bit of searching and found an Indoor book by
        Ron Williams at my local library. It had a bibliography with a
        reference to John Kaufmann's HLG book. Armed with the proper title
        and spelling, the inter-library loan system should have me a copy
        in a week or so. If I can find either of these books in the store,
        I'll probably buy both. 
        
        HLG information is definitely scarce, but after reading the stuff
        on Indoor FAI microfilm ships, I know one thing I DON'T want to
        get into. I'm still interested in exchanging HLG info with any
        other folks with similar interests. 

        Now to go out and order some .01 "C" grain 4# balsa! 

Lone Star is about the only place I know of that you can buy 1/64
balsa.  They also have 1/20, which is often used for indoor
structures. 

Ron Williams book is considered THE authority on indoor.  I know
what you mean about the microfilm.  Condenser paper is about as
kinky as I want to get.

An afterthought:...but you should see those microfilm jobs fly!
Its a religous experience.

    
    	Fancy formulas, guys...  Glad I was close with my quick answer.  I
    just figured the sucker would hit with about the same velocity as it
    left in the vertical direction.  If it goes up for half the time,
    then the initial velocity (vertical) is the same as if dropped from
    the 8.5 second `height'.  At 32 ft/s� for 8.5 secs...  Presto.

						LEO VOSS
 						PHYSICAL REPAIR TECHNOLOGY ENG. 
						MAILSTOP: @JGO
 						E-MAIL: NMGV06::VOSS
						DTN: 889-9350

    
    Hi there,
    
    I know its been a long time since the last note to this subject
    was added, but has anybody ever managed to get John Kaufmann's
    'hand lanched glider' book. My club is already trying quite a
    longe time to obtain this book for our library.
    We are quite active in HLG and this book is unique in its kind.
    By the way if there are still people interested in HLG,
    Bob Wells designed a chuck (another word for HLG) and described
    also how to trim and fly it. I think friends might still have this
    report so if there is any interest I could........
    
    Leo
    
    

        I found Kauffman in my local library. It was hidden in the
        childrens section, and not indexed in the regular card catalog, so
        it wasn't easy to find. I also believe that it is out of print, so
        I fed it thru the local copy maching. I'd still buy a copy if I
        could find it, just for reference. 
        
        Over the past year, I've learned a bit about HLGs. I guess I found
        out how much this weekend. I was out trimming a 24" span model
        (actually supposed to be rocket powered, but it still has to be
        trimmed out before launch), and on the 4th toss, got off a pretty
        bad throw. While I expected it to head straight for the ground, it
        transitioned pretty wuickly, and settled into a glide.
        Unfortunately it was too good. It stayed pretty level over the
        grass launch area, and then just took off when it got over the
        corn. I lost sight of it while trying to cross a farmers fence
        after over 10 minutes, still going up, and at least a mile or so
        past where I had chased it to. 
        
        So the new question is How to build a good DT. I've rarely used
        them in the past. but do have some biases. I don't like anything
        that messes with the stab, as that is the primary trim adjustment.
        Drop weights don't always do enough to bring the model down, and
        flaps temd to cause spiral dives that can trash the model on
        impact. I like the pivot or pop wing idea, where the front of the
        wing pops up (effectively the tail popping the other way), or the
        wing comes off completely, tied to the fuselage with string so
        they flutter down together. Both have the advantage of a removable
        wing, making the model more transportable for contest travelling. 
        
        I'm trying to decide how to activate either of these. DT fuse is
        the normal route, but is always a mess to deal with, and a real
        fire hazard given the current drought conditions around here. I'd
        like to use one of the TOMY timers, modified to run slower, but
        I've been stumped on how to activate either wind device from the
        mechanical timer. Any ideas, or DT alternatives? 

        						. (model in sky)
        
        
        
        
        
        
        
        
        
        
        
        
         O
        \|/ Bob, looking for his long lost model
         |
        / \

>        So the new question is How to build a good DT. I've rarely used
>        them in the past. but do have some biases. I don't like anything
>        that messes with the stab, as that is the primary trim adjustment.

I forwarded your question to Bob Burley - what follows is the mail he
sent me.

Bye
Kay R. Fisher
===============================================================================
I have had excellent past success by routing out BOTH sides of the
nose area, installing tongue shaped panels on a pin hinge at the
aft (round part of tongue facing forward) so that they are absolutely 
flush with the fuselage sides.  I then put DT fuse tube on the top
of the nose formed area.  I use one of those little rubber bands that
are used for teeth braces, looped around the nose area, over each of 
the "tongue flaps" at about 1/3 the distance back from the forward most 
point of the flaps and continuing the band over a little u shaped rubberband 
suspension point using a couple of bent pins in the area where the DT fuse
would be.

The DT fuse burns the rubber band.  The slipstream pops both of the
flaps out and holds them there, causing the nose to pitch down.
Having two pop out flaps eliminates the spiral problem and the
resultant drag has proven very effective in preventing a high
velocity dive into he ground.

I have also imbedded a short section of ballpoint pen spring
transverse to the fuselage, under the flaps (compressed when
the flaps are closed) to insure rapid, synchronous opening.

I must have well over 500 flights with this approach with never
a failure.

        It pays to put a name, address, and phone number on EVERY model
        you fly. A little luck never hurts either. Today my wife got a
        call from a farmer about 2-3 miles from the school that the meet
        was held at. He found my model near the bottom of a tree in his
        yard! The stab broke off, but it always does that. Other than
        that, it sounds like it is OK. I'll have to make some arrangements
        to get it back, but it sure beats building a new one. I still need
        to work on DTs. 

    At a dog-and-pony show for the Cub Scouts Saturday, we put on a
    before-the-audience contest/demo.  Terry Sweeney had claimed that he
    could build a free-flight glider from start to finish in less than
    twenty minutes.  Glen Schrader said he could do it in ten.  We had a
    challenge!

    With each starting with stock balsa from the store and tools of his
    choice and with each assisted by a Cub Scout, they took their places at
    a long table in front of the kids.  With knives flashing and hot stuff
    squirting about like water from a garden hose, they were off.

    Glen was a clear winner --- 9:50, and that included several test
    flights by Glen and his helper.  Terry finished a minute or two later,
    but his plane flew like a dream after a bit of trim work, so he won
    second place.  The helpers got to keep the planes.

    I think my club can be persuaded to support a Delta Dart program at a
    Pack meeting.

      This is the only note that I found that has a reference to
    "Condenser" paper. Can anyone tell me what it is and where it can be
    found ?  What about something called "Doc Martin's" ? The reference to
    this seems to point to some kind of watercolor for the condenser
    paper. 
    
      Any help would be appreciated.