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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

1463.0. "Elf Engineering killer wings" by MR4DEC::ANKER (Anker Berg-Sonne) Mon Oct 19 1992 11:24

                In an issue of RC Soaring Digest a couple of months ago I
        saw a writeup  and an ad from an outfit called Elf Engineering in
        Wylie, Texas.  It  turns out the impressive name covers a one man
        shop owned by Dale King.    Dale  will  build  a  glider wing for
        approximately $225 to your specifications.   It's  made  of  blue
        foeam sheeted with obechi and comes in  either  plug  in or three
        piece.
        
                I have been unhappy with the size of  the Legend flaps so
        I  decided  to  take a chance and order a  set  of  wings  to  my
        specification.    I chenged the airfoil to SD7037, lengthened the
        center section  to  54",  shortened the outer panels, reduced the
        dihedral, and maintained the Schuman planform to create an "anker
        Special Killer Wing".
        
                The wings arrived a  couple  of weeks ago and I have been
        going real careful to make  sure they came out well.  A couple of
        booboos were inevitable (at least for  me).    I  managed to sand
        through the obechi in one place.   But  overall  I'm really happy
        and  decided  to polyurethane the wing to let  the  natural  wood
        stand out.
        
                Yesterday I was ready for the big test.  First off the CG
        was too far back.  This is the first time  I  have flown a glider
        that tucks in the glide test.  Talk about excitement!  Every time
        I  touched  the  stich  it would either climb to a stall or  dive
        towards destruction!    Even then I managed to find a thermal and
        get a half  decent flight.  After getting the CG straightened out
        I had several great  flights,  terminating in one where I decided
        to go for my 1/2  hour  flight for ESL level III after Flying for
        quite a while.  It took  a  little  while  to  get  the witnesses
        straightened  out  so the flight ended being  well  over  the  49
        minutes I clocked.  At the end of the flight I made a try for the
        1km goal and return, but the spotters failed to  spot  the plane,
        so I'm goinf to have to try that some other time.  Anyway, I have
        never  had  this good a set of flights with a brand  new  set  of
        wings  before.    They really are killer wings and well worth the
        money.  Being able to create a custom plane without doing all the
        building yourself is just my ticket.
        
                If anybody else  is  interested  I have an oreder form at
        home.
        
        Anker
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1463.1I've been to Wylie, TX! ("Big deal!" :-)RGB::MINERDan Miner, DTN:225-4015, HLO2-1/J12 (@ H11)Mon Oct 19 1992 15:1711
>                In an issue of RC Soaring Digest a couple of months ago I
>        saw a writeup  and an ad from an outfit called Elf Engineering in
>        Wylie, Texas.  

    Useless footnote: My parents live in Wylie, TX.  It's a dusty little
    town just outside the "Dallas" area.  (Actually northeast from Plano.)

    I'll have to visit Elf Engineering on my next visit to TX.  It's
    also interesting to note that Wylie is where RCSD is published...

                                    - Dan
1463.2exUNYEM::BLUMJTue Oct 20 1992 10:379
    Anker,
    
         What kind of spar does the wing have?  How much does the wing
    weigh?
    
                                                          Thanks,
    
                                                          Jim
    
1463.3ConstructionMR4DEC::ANKERAnker Berg-SonneTue Oct 20 1992 11:0725
        Re:                       <<< Note 1463.2 by UNYEM::BLUMJ >>>

        Jim,
        
                The spar  is  balsa  with  air-ply  shear  web wrapped in
        kevlar.  The  top  and  bottom of the spar is covered with carbon
        fiber during layup.   All  this  is  taken from the writeup.  The
        spar  isn't  visible anywhere.  The  complete  wing  with  servos
        installed and painted with polyurethane is 44oz.    This  isn't a
        floater wing.  The fuse comes in at  close  to 50oz, so the whole
        plane is at roughly 94 oz.  This has  to  be  considered  in  the
        context  of the wing area which I guess is roughtly  1100  square
        inches.  The wing loading end up being about 12.5 oz  per  square
        foot, which is fine.   I'm  personally  more than prepared to pay
        for the increased stability of blue foam with a weight penalty.
        
                With the original Legend wing the  plane weighed in at 80
        oz and a wing loading of 11.5 oz per square foot.
        
                There  is  a  small amount of flex  in  the  wing  during
        launch, which siuts me fine.  With the original Legend wing there
        is zero flex and the first indication of too  agressive launching
        is the ailerons fluttering.
        
        Anker
1463.4As seen on a different Legend...HANNAH::REITHJim HANNAH:: Reith DSG1/2E6 235-8039Tue Oct 20 1992 12:136
or the wing going BOOM as Steve Schommer's did at the Nats

Just out of curiosity...

how was the wing packaged for shipping and what was the actual turnaround 
time after you got all the design details (and money) to him?
1463.5Top class packaging and just under three weeksMR4DEC::ANKERAnker Berg-SonneTue Oct 20 1992 15:4013
        Re:   <<< Note 1463.4 by HANNAH::REITH "Jim HANNAH:: Reith DSG1/2E6 235-8039" >>>

                Packaging was  superb.  The panels were in the cores they
        were cut from  and then there was a ton more foam to fill the box
        completely.
        
                He did the wings  in  under two weeks and UPS took a week
        to get them to me.    He  and  his  wife were also really good at
        calling me back when I called  to  ask  where  they  were  (I had
        expected  a two week turnaround expecting a  bit  too  much  from
        UPS).
        
        Anker
1463.6Order form?USCTR1::BJORGENSENJust another ASEL....Sun Oct 25 1992 22:208
    Anker
    
    Would you mind sending me a copy of the order form??
    
    Brian Jorgensen
    MR03-3/N17
    
    Thanks!
1463.7Will do!MR4DEC::ANKERAnker Berg-SonneMon Oct 26 1992 08:485
        Re:        <<< Note 1463.6 by USCTR1::BJORGENSEN "Just another ASEL...." >>>

        Will do!
        
        Anker