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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

1044.0. "glow powered gliders" by CSCOA5::HOOD_DO () Wed Jul 05 1989 15:33

    I have a Dynaflite Piece O'Cake with a Cox Black Widow .049, and it
    is WAY underpowered. I took it out yesterday for the first flight,
    (It's and mine) and it will barely climb. I had to add several ounces
    (or more) to the nose to get it to balance, and I have a feeling
    that it's just way too heavy for the Black Widow. My instructor
    said that i should either:
    1. move the wing (and cg) back (about 1"), and eliminate the weight 
    up front or
    2. put on a stronger engine.
    
    Does anyone with experience with powered gliders have an opinion?
    I was thinking of putting on a Tee Dee .049 or .09, eliminating
    the weight up front, and moving back the wing if still out of balance.
    
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1044.5Powered Glider infoCSOA1::RANKINThu Jul 06 1989 15:3016
    Well, bac to the orrig question in .0 
    
    I have a powered glider.  It is a Sofisticated Lady (Greenberg Kit).
    It is powered with the TeeDee 049 mounted on a D&R (I think) engine
    pod located on top of the wing.  This is one mother of a motor for
    its size.  A friend of mine has the black widow mounted on his similar
    plane and it has never been as high as mine.  
    
    The TeeDee comes with 2-3 head gaskets in it to make it so that
    you can start it when it is new.  As the engine breaks in, you
    gradually take them out.  
    
    I would definitly do this combo again. 
    
    Good luck
    JR
1044.6OS 20 Four StrokeWR2FOR::BEATTY_WIFri Jul 07 1989 23:227
    I saw a piece O' cake with an OS 20 four stroke on it.  It was an
    excellent combination.  Plenty of Power, quiet and enough weight
    up front to balance well.  On the color combo's I usually run a
    piece of dark trim along the leading edge, it helps you get the
    plane level from a great distance when landing.
    
    Will
1044.7Its a Butterfly flying byeCSC32::M_ANTRYThu Jul 13 1989 19:067
    re: .6  I bet you are thinking of the Butter Fly.  I had a OS Max 25
    that was ported on mine.  Way to much engine.  It was funny the thing
    would fly just as fast on 1/2 throttle than it would full boar.  Just
    goes to show that DRAG is something to be considered.
    
    re: .0  No ideas on the engine.  They do make a .074 engine that may
    help out.
1044.8almost there...CSCOA3::HOOD_DOMon Jul 31 1989 21:1319
    
    Well... I put the Tee Dee .049 on there, and it has twice as much
    power. I still have the problem with it being tail heavy. I moved
    the wing back about 1/2 inch, but i still have to add WAY to much
    lead in the nose to approach balance. the engine weighs about 1.2
    ounces, and I have been advised to move the engine out at least
    an inch ( glue a balsa block/plystrip on the nose, and remount engine).
    My question is....how far out can I move the engine? I would like
    to take ALL of the added_for_balance weight out of the nose and
    move the engine out until it balances. This would SIGNIFICANTLY
    lighten the plane, but are there any rules_of_thumb I need to follow
    concerning prop/engine and wing placement? 
    
    BTW... The plane does fly , and I made my first RC landing this 
    past weekend (if you count being "talked down")! It's amazing how
    much concentration it takes for just a 5 or 10 minute flight ( for
    a beginner). 
    
    Doug
1044.9TEKTRM::REITHJim Reith DTN 235-8459 HANNAH::REITHWed Aug 02 1989 13:063
You could always saw the nose off flat and mount the engine there...

But then it wouldn't be a glider would it ;^)
1044.12More speed needed for extra weightLEDS::COHENSome limitations may apply...Tue Aug 22 1989 20:324
    You got it wrong.  A heavy plane may gain altitude in a climb more
    slowly than a light ship, but, given identical aircraft, differing only
    in weight, the heavier plane will fly faster and maneuver less agilely. 
1044.13Fast is relative(its still the slowest in the sky)CSCOA5::HOOD_DOWed Aug 23 1989 13:1627
    
    Actually, it is pretty fast down wind or in a dive. I finally 
    got one windless day (Sunday) that I didn't have to fight the wind.
    I ended up mounting the engine on a 1" square balsa, 2.5 inches
    out in front of the old firewall. I mounted the 1oz tank on the
    balsa, and moved the battery up where the tank was. This completely
    balanced the plane without adding additional weight. 
    
    I had already flown it 10 times, and was anxious to solo. I still
    wanted someone beside me to talk me down and remind me of where
    I was (for a landing), so one of the guys that normally put it up
    for me hand launched  and I flew the entire flight. From that point
    on, I hand launched it myself and flew the entire flight.
    
    The Tee Dee .049 develops full power after running 30-60 seconds.
    I switched to 25% Nitro, and took a gasket out of the head.
    If you don't hold back a minutes, and if it is windy, this plane
    is VERRRY tricky (especially close to the ground and tail heavy).
    Now, I hold back at least 30 seconds, fly in near zero wind, and
    the plane is balanced. It is very easy to fly and yes, it can be
    fast.
    
    I am still going full speed ahead on the Falcon 56. I dont like
    having to wait for windless days to be able to fly, and I want to
    do an aileron roll. 
                       
    Doug
1044.14PLACING A .15 ON A ELECTRIC SAILPLANEWMOIS::ALDENDougThu Sep 10 1992 16:0811
    I just purchased a Airtronics Eclipse electric sailplane.  Has anyone
    had any experience outthere either with this particular kit or placing
    a .10/.15 glow engine on this type of plane (it is similar to the Great
    Planes Spirit, and Goldberg Electra ?    
    
    Any experience/advise would be appreciated.
    
    Doug Alden
    DTN 241-4274
    WMOIS::ALDEN
    
1044.15I wouldn't do itMR4DEC::ANKERAnker Berg-SonneFri Sep 11 1992 14:4812
        Re:                   <<< Note 1044.14 by WMOIS::ALDEN "Doug" >>>

        Doug,
        
                I have  one and would NOT recommend putting a glow engine
        in it.   The airfoil generates a lot of lift when the power is on
        and the plane will  climb  at a very steep angle when under power
       if its trimmed for minimum  sink  when  unpowered.   You obviously
        didn't get the deluxe kit that includes a motor (that is actually
        one of the best deals in town).
        
        Anker
1044.16LOOKING FOR A KITEWMOIS::ALDENDougFri Sep 11 1992 16:228
    Thanks for you reply.  From your response I gather i will be able to
    fly it up high and cut the engine and glide down or keep the engine
    at a constant RPM and adjust the trim.  It sounds like if I want to 
    fly around adjusting the RPM, it will be very difficult.
    
    I was looking to fly the plane like a kit.  Keep it up high, place the
    engine to idle and float it around.    Maybe I should have went to K
    Mart for $1.99 and buy a real one.  :-)
1044.17Can be Done - NOT a KiteLEDS::WATTWed Sep 16 1992 15:0411
    I have the Eclipse running with the stock geared electric motor.  You
    could put a .10 glow engine on it and it would fly ok.  One advantage
    to the electric is that you can shut the motor off and restart it when
    you need to gain altitude again.  As Anker said, this plane is not
    designed to fly fast so don't overpower it.  The electric is probably
    about equivalent to an .049 engine in power, but the gearing allows it
    to swing a bigger prop.  Most glow engines won't idle for very long
    before they quit unless you keep the idle speed fairly high.
    
    Charlie
    
1044.18OS FP15 POWERED ECLIPSEWMOIS::ALDENDougWed Oct 07 1992 16:4218
    I built the eclipse.  This kit is A1, the quality of the wood, the
    instructions, and what they do to make it easy for one to build.
    
    The plane had its maiden voyage with the OS15 FP.  I seemed to get only
    1 ounce of the 2 ounce tank before it stopped.   I have since installed
    a 4 ounce.   The plane was lots of fun flying it around and toward the
    end of the flight I would climb it way up high and the engine would
    stop and then glide down.  Also the 15 is not that noisy.  A 10 would
    have been fine.  A .049, probably would be wimpy.
    
    
    I could go on and on....          
    
    
    This hobby has no limits...
    
    Doug