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Conference vmszoo::rc

Title:Welcome To The Radio Control Conference
Notice:dir's in 11, who's who in 4, sales in 6, auctions 19
Moderator:VMSSG::FRIEDRICHS
Created:Tue Jan 13 1987
Last Modified:Thu Jun 05 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:1706
Total number of notes:27193

1144.0. "Repairing planes" by WRASSE::FRIEDRICHS (Full time parent... finally!) Mon Nov 06 1989 14:56

    Well, the crash gods caught up with me this weekend.  A squirrly
    takeoff followed by loss of power did me in.  But, this isn't the
    "How was your weekend" note....
    
    This note is meant to be a collecting place for hints on how to make
    repairs.  I will be moving some scattered notes on the topic to here
    as time permits.
    
    Let me start it off though by presenting my current predicament...
    
    The piece that broke was the dowel between the 2 halves of the
    elevator.  The problem is that the builder (not me) used iron on 
    gapless hinges, then fiberglass and painted over them.  He used these 
    for both the rudder and elevator.  
    
    So options I see at this point are:
    
    1 - cut all the hinges off, repair the piece and use some new hinges
    that are inserted into the wood.  Not bad, but I am not thrilled about
    having to re-hinge it all...
    
    2 - Cut away the broken piece.  Add a second elevator pushrod and use
    a "Y" connection to coordinate them.  Not bad, but there isn't much
    room in the fuse of this plane to be messing around with a "Y"
    connection.
    
    3 - Make a patch out of ply or metal that fits the shape of the
    elevator at the joint.  affix it to the elevator as a splint to 
    the broken piece.  A bit ugly...
    
    4 - Cut out the old dowel and put in a new one.  Again, a bit ugly...
    
    
    So, are there other alternatives??  Have people tried any of the above?
    Which did you prefer??
    
    Thanks!
    jeff
    
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1144.1OUT DAMNED SPOT...GHANI::CASEYATHE DESERT RAT RC-AV8RThu Aug 13 1987 14:3711
    As Ken suggested, K2R spot remover ix simply excellent for sponging
    oil out of oil-soaked balsa wood.  Simply spray on a thin layer
    over the affected area (soaking the wood is not necessary/recommended)
    and allow to dry.  You'll notice a "yellowing" of the bone-white
    K2R powder as oil is absorbed into it.  Now merely brush the powder
    off.  Repeat this process 'til no more yellowing is observed and
    you will have removed ALL the oil yer' likely to.  At this point
    you might brush some balsa-rite on the problem area to insure a
    good bond when you Mono-Kote it.  
    
    Adios,	Al
1144.2SPKALI::THOMASThu Aug 13 1987 18:1416
    
    I hole heartly agree with Al's step of using Balsa Rite applied
    to the balsa prior to covering.
    One other suggestion is a modification of the heat iron method.
    Use your heat gun to warm the surface. You can scraps and dab
    the oil up with papertowels. If you weren't in a hurry to fly
    this ship(say over the winter) you could pack the ship in a box
    filled with speedy dry. In the spring the ship would look almost
    like it was made of new balsa wood.
    
    However use caution when/if you heat the oily surface. Do this
    is a well ventilated area. You indicated that you covered the surface
    with CA. Warmer/hot CA will give off fumes.
    
    
    							Tom
1144.3Try MEK; it works to.RIPPER::CHADDGo Fast; Turn LeftThu Aug 13 1987 22:0919
Re: .22

I have used and it works a solvent called MEK, don't pick me up if the spelling
is incorrect but I short for Methyl Ethyl Keytone. Don't get it confused with
PEKP the catalyst for polyester resin. 

Simply brush it on liberally and the oil just disappears. A secondary use is as
a paint striper when you do a repaint job. 

As with all solvents be careful not to inhale the fumes or get it on your
hands. I don't trust any of them with my health. 

--------------------------------------------------------------------------------
Re:.24

Bob, You had better come to OZ so we will teach you how to fly then you can 
enjoy the delights of an oil soaked wing. 

John.
1144.12fuse totalled from mid to frontBRYAN::ARCHERBrian Archer DTN 444-2137Wed Sep 14 1988 00:2234
Well, my $6.00 torch was pretty good....except I now wish I had a soldering 
type tip on the end.  I scorched just a bit of my plane...until I broke out 
a heat shield.  I'll keep using it though.  The solder connections were 
excellent!  I had some great flights with the repaired Strikemaster!  In 
fact I performed my first (and second, and three in a row) barrel roll!

On to my next project.......I let a friend fly the Kavalier....CRASH!!!!!
My main concern was that he felt worse than I did.  Anyway, the wing is not 
bad.  I just need to glue the two halves together again.  They separated in 
an even split on the seam.  I may even convert the alierons to flaperons in 
the process!

Alas, the fuselage is a different story :*(   The fuse is totalled from the 
front to the back of the "cockpit".  From there back, its in perfect 
condition.  The control rods and surfaces are still in perfect working order!

My question is.....from those experienced in re-kitting, what is the best 
way to proceed from here!  I have ordered a fuse kit from SIG (and already 
recieved said kit).  Is it best to try to piece the forward half of the 
fuse to the existing back?  Or is it better to remove the rudder and
elevator from the remainder of the fuse and build a whole new fuse to mount
them on (from the fuse kit, of course).

I just looking for some more free advice.....and wanted to let y'all know 
I'm still at it (and having a great time.....I'm hooked).

I've been fondly gazing at the Super Aeromaster I puchased....winter 
project at this point.  I'm putting an O.S 61 SF-P (also gazing at it!) in 
it.  Whadda'ya think???

If anyone gets to Michigan, let me know!

Cheers
B-
1144.13the long and short of itK::FISHERThere's a whale in the groove!Wed Sep 14 1988 13:2921
>What are the applications for the three different wing configurations 
>listed in the plans.  Kay, which one did you use...with what engine...and 
>how does it fly?

I did the short/short configuration.  I haven't flown it enough yet to
really comment intelligently - but Charley Watt has the long/long wing
version and he flew mine at the last fun fly so maybe he will comment on
the various wing configurations.  

I've got an old OS61 black head heli engine and presently it is not running
too reliably - probably fuel tank position problems or muffler pressure.
But during the first two flights when the engine ran better it had plenty
of power and this is an old engine without Schneurle porting.

About the repairs on the fuselage - I can't say that I would know what to
do myself in your case.  Generally I never feel that the plane is as good
after I do extensive repairs and since you have the new fuse kit I think
you should build everything new that you have parts for - that way
it is straight and light.  On the other hand I'm pretty lazy and might
be tempted to hack saw the front off and just do that - probably end
up being crooked, heavy, and not as sturdy.
1144.14Broken nosesRICKS::MINERElectric = No more glow-glopWed Sep 14 1988 13:5422
RE: < Note 669.13 by BRYAN::ARCHER "Brian Archer DTN 444-2137" >

    When I crunched the nose of my Electrostreak, I just cut off the
    damaged part at an angle, made some new fuse sections from sheet,
    and started gluing.  I re-inforced the area around the joint with
    1/32" plywood on the inside.  However, since the 'streak is scratch
    built, I couldn't just order a new fuse kit.

    I'd recommend saving the fuse kit for more disastrous crashes and
    buying some balsa to rebuild the crunched one.  Just make SURE you
    glue everything on straight.  (I used a fuse jig on mine.)

                       _____
                      |     \
                      |      \                          Silent POWER!
      _        ___________    _________   |            Happy Landings!
     | \      |           |  |         |  |
     |--------|-  SANYO  + ]-|  ASTRO  |--|              - Dan Miner
     |_/      |___________|  |_________|  |
                      |       /           |     " The Earth needs more OZONE,
                      |      /                       not Caster Oil!! "    
                      |_____/
1144.15I rebuilt!VTMADE::SOUTIEREWed Sep 14 1988 14:4912
    	
    	I guess it depends on the time you want to spend on rebuilding
    a fuse vs. the time its going to take to build the kit and move
    the tail feathers, servos, gas tank etc...
    
    	I HAVE rebuilt my Eaglet after a crash with similar results.  I
    ended up re-fitting all the broken parts (or at least most of them)
    and bracing up the weak areas with thin sheeting.  The plane is
    definetly heavier (I can't do outside loops anymore) than it was,
    but I didn't have to buy another fuse.  
    
    Ken
1144.16Do which ever is easiestLEDS::WATTWed Sep 14 1988 16:5214
    	Do whichever is less work.  If building a fuse and transferring
    the tail feathers and other whole and undamaged parts is not too
    much more work, then you will have a 'new' fuse when you are done.
    	I flew Kay's Aeromaster a little and I also have one (with the
    two big wings), but I didn't really get a chance to really see the
    difference in wings.  I think I would build the small wings like
    Kay did if I were do build another one.  My Aeromaster rolls a little
    slow even with the maximum deflection I can get.  I am now flying
    mine with a .91 Surpass 4-stroke on it and it really performs.
    I flew it with a Supertigre 61 2-stroke for a while and then converted
    it over to the 4-stroke.
    
    Charlie
    
1144.4HUH??CTD024::TAVARESJohn -- Stay low, keep movingMon Nov 06 1989 20:144
I think you guys have been sniffing too much Balsarite and MEK --
what does your answers have to do with repairing tailfeathers?


1144.5Here's an answerCURIE::ANKERAnker Berg-SonneMon Nov 06 1989 20:1818
        Re:     <<< Note 1144.4 by CTD024::TAVARES "John -- Stay low, keep moving" >>>

                When I got tired of the same thing happening all the time
        to my SIG Riser, I simply drilled two holes into the two elevator
        halves and inserted a  piece of wire bent into a square U.  I was
        able to insert it without detaching the tailfeathers and it works
        a whole lot better because of its slight springiness.

                      _ 
                     / |
           _----____/==|
         /__====------- 
             |-          
            /              
           /               
         Hang in there!      
                           
             Anker           
1144.6ENGAGE EYEBALLS BEFORE PROCEEDING..... :B^)PNO::CASEYATHE DESERT RAT (I-RC-AV8)Mon Nov 06 1989 20:4524
    Re: .4, John,
    
    Look at the dates of the replie, amigo, then go back an read the base
    note...Jeff copied some _old_ repair suggestions into this new topic.
    
    Jeff,
    
    I'd also though of what Anker suggested, using a piece of music wire to
    rejoin the elevator halves.  If you can't flex the elevators enough
    up-or-down to drill into them from the hinge line, you could cut a
    narrow slot, bury the wire in the slot then fill with balloons and
    touch-up.  Orrrrrrr........
    
    Did you say the elevators were originally joined with a piece of dowel?
    If so, you might be able to trim the dowels back to stubs short enough
    to be able to telescope a piece of brass tubing over them with plenty
    of CYA or epoxy.  Don't trust it?  Then drill a tiny hole through the
    tubing, dowel, et al and pin it together for security.    

      |
      | |      00	 Adios,      Al
    |_|_|      ( >o
      |    Z__(O_\_	(The Desert Rat)

1144.7VTFARM::SOUTIERETue Nov 07 1989 15:169
    Anker,
    		Are you inserting the U-shaped wire on the back-side
    of the elevator?
    
    		I've presently got the split-elevator set up on my
    Chipmunk and one side is a bit loose and I don't want to un-hinge
    the elevator to fix it.
    
    Ken
1144.8CURIE::ANKERAnker Berg-SonneTue Nov 07 1989 16:0722
        Re:                     <<< Note 1144.7 by VTFARM::SOUTIERE >>>

        Ken,
        
                No, the  idea  is  to  insert  it  at  the  front  of the
        elevator, right up against the bertical and horizontal stabs.  If
        you are able to  bend  the elevator close to a 90 degree angle it
        should be possible, with some  swearing,  to  drill the holes and
        insert the wire.  Inserting from the back is an intersting idea I
        hadn't thought of.  I can't see  what wouldforce the elevators to
        move together in that setup, however.
        
                      _ 
                     / |
           _----____/==|
         /__====------- 
             |-          
            /              
           /               
         Hang in there!      
                           
             Anker           
1144.9fiberglass and caDACT42::BDONAGHYTue Nov 07 1989 17:3412
    How about wrapping some thin stips of fiberglass around the dowel
    (wrap it around the break. if it broke in the middle )
    and using thin ca glue to make it permanent. The fiberglass comes
    in strips that are 1/2 to 1 1/2 in wide and three feet long. Cost
    about $1.50 . You just cut it with sissors , a dab of ca will keep
    the ends from fraying. Wrap it around and hold in place with your
    fingers that are inside a plastic sandwich bag (your fingers) and
    thin ca it. ten seconds later , solid as a rock. Epoxy thined with
    rubbing alcohol works ok , messier and takes longer to dry.
    
    Bob in Phila.
    
1144.10Loose paper in cockpit problemK::FISHERStop and Smell the Balsa!Tue Nov 07 1989 17:5618
Interesting subject - OK - picture this.
My Aeromaster has a Canopy that after I put it in
place it completely sealed the cockpit.

My instrument panel was composed of a LN03 file
that I cut and glued to the fire wall with rubber
cement.  Worked fine for over a year.  Now my instrument
panel is floating around the cockpit.

I really don't want to cut my way in and certainly don't
want to re-paint anything.  How do I get the paper
back in position and glued down?  If it ain't easy
I won't do it!

Bye          --+--
Kay R. Fisher  |
---------------O---------------
################################################################################
1144.11Inst. panel fix?ROCK::MINERElectric = No more glow-glopWed Nov 15 1989 20:5720
RE: Note 1144.10 by K::FISHER "Stop and Smell the Balsa!" 
>>           -< Loose paper in cockpit problem >-

    How about this:

    Poke a small hole in the blasa that was used as the base for the
    instrument panel.  Then, move the fuse around until the paper is in
    the correct position and then squirt a drop of CA or "Elmers" glue
    in through the hole in the balsa.

                       _____
                      |     \
                      |      \                          Silent POWER!
      _        ___________    _________   |            Happy Landings!
     | \      |           |  |         |  |
     |--------|-  SANYO  + ]-|  ASTRO  |--|              - Dan Miner
     |_/      |___________|  |_________|  |
                      |       /           |     " The Earth needs more OZONE,
                      |      /                       not Caster Oil!! "    
                      |_____/