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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

1446.0. "1/4 scale P51D slope glider??? :^O" by DNEAST::GILPATRICK_R (On a major learning expedition here!) Wed Aug 12 1992 23:23

    Hello everyone,
    
               I have been reading through this notes file for a while now,
    and have been reading different RC mags for a while.  There was an
    article in RCM a couple of months back which caught my eye.  It was
    about a guy in Hawaii that built a 1/4 scale P51D mustang slope glider.
    He needed a 28-30 mph wind and flew off the cliffs.  His model stayed
    airborn for over 55 minutes before he decided to land.  In the article
    he mentioned that he had numerous other slope gliders of the same
    nature, only quite a bit smaller. ;^)
               My question is....has anyone here built a glider out of a
    kit like a mustang, or spitfire which was originally intended to be
    gas powered plane, but used it as a glider??   I don't mean a 1/4 scale
    plane, but something like a 50-60" WS size plane??  Sounded really different
    and I would think you would still need some wind to keep them up.
               Just curious about anyones experiences with this, or
    comments about how you would think these would actually fly.   Thanks.
    
                                        Gil
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1446.1Seen a coupleNEWOA::WINSLADEThu Aug 13 1992 06:1219
    I've seen a couple of aircraft of this type being flown with pretty
    good results. One of them was a Kawasaki 'Tony' of around 50" span and
    had its motor replaced with nose ballast - i.e. it was intended to only
    be used as a slope soarer. I can't remember what the other was, but the
    guy had only removed the prop & taped some polythene over the engine to
    keep the dirt out on landing.
    
    The airfoil is a major factor. If it's symmetrical it will need much
    more lift to give a decent performance. If it's more of a 'fun flyer'
    with a semi or even flat-bottomed section it wouldn't need such a
    strong wind/high hill.
    
    In the UK there's a strong following for this type of PSS aircraft, but
    designed from the outset for slope use. Incidentally, I fly a P51C
    Mustang, designed for slope use, 55" span with an S3021 section.
    
    Hope this helps,
    
    Malcolm
1446.2Popularity depends on site availabilityHANNAH::REITHJim HANNAH:: Reith DSG1/2E6 235-8039Thu Aug 13 1992 08:027
There's a lot of kits available but unfortunately it seems most of the sites are
out on the west coast. A beach cliff site might work with a good prevailing 
onshore wind but we don't have any locally in Central Mass. The Northeast 
Sailplane Products catalog has an entire section devoted to PSS. They do some 
incredible stuff out in Washington state where they flew the 15' B-52 featured 
in the magazines about a year ago. Most of our slope soaring is done with floater
HLGs and 2 meters. Check out the Vern Hunt ads in the magazines.
1446.3PSS thoughtsUNYEM::BLUMJThu Aug 13 1992 10:1338
    There are many kits and plans available for the scratch builder
    who favors Power Scale Slope Soaring.  Really you are only limited
    by your imagination - IF!!!!! and the If is is you have a place to
    fly your creation.
    
    I agree with Jim Reith that it is hard to find acceptable inland
    slopes which generate lift sufficient to keep up PSS ships on the
    East coast.
    
    If you build a light model with a high lift airfoil(E205, S3021, etc)
    as Malcom mentions you might be able to fly it on our modest east
    coast slopes.
    
    I built a Pierce-Aero Ridge Rat with Semi symmetrical airfoil and was
    never able to keep it up on the same hills that I can fly my Multiplex
    Fiesta for hours.
    
    I saw small WWII(50" wingspan) PSS ships fly at Kiona Butte in
    Richland, Washington in approx. 10 mph wind this spring.  The
    performance was awesome - 100 ft. loops(inside and outside), dives
    into the valley followed by 200 ft. vertical rolling pullups.
    There were 1/4 scale ships at this meet, including a P51, but they
    did no fly because wind of at least 30 mph is necessary to support
    these giants.  The 5 meter "glass slippers" flew very well in these
    light conditions, however.
    
    Kiona butte is 1200 ft. above the valley floor, has a slope of 60
    degrees and no trees.  If you want to go to soaring heaven - this is
    it.  If you can build it- you can fly it here.  The thermals are also
    tremendous as this is a desert environment.  You can drive to the
    top of the slope and there is a parking area and flat landing area
    behind the slope.   This is just one of several sites available
    in the  Richland area.  I am planning to take a "soaring vacation"
    here some day.  Enough rambling.
    
                                                 regards,
    
                                                 Jim 
1446.4RCM has plans for a P-51 Mustang Slope Soarer if you're interested.STOHUB::JETRGR::EATONDan Eaton St.Louis,MO,USA, 445-6522Thu Aug 13 1992 11:065
RCM also published plans for a P-51 slope soarer about 5 years back. I built
the thing before I realized finding a place to fly it was going to be a 
problem. It's still hanging up in my shop collecting dust. I was given a 
Dynaflight Mustang  40 for Christmas last year and in comparing the two they're
just about identical in size.
1446.5thanks folks!DNEAST::GILPATRICK_ROn a major learning expedition here!Thu Aug 13 1992 13:1822
    Thanks for the replies!
    
               I have never gotten into RC flying, but I have always had a 
    place in the back of my mind that took off when seeing a glider, and this 
    sounded pretty neat.   Conway NH has an airport that has full scale
    gliders that you can take lessons with.  Kind of a dream that may, or
    may not get lived out.  RC gliders seem to be the next best thing to
    being there.  :^)
               I guess my concern for a site to try it is valid.  I live in
    Maine, and have never seen anyone doing this sort of thing. 
    
               Another question......please pardon my ignorance. ;^)
    Would a high start work on this type of plane?    I was looking at a
    Dynaflight funscale mustang, or a spitfire.  The airfoils look to be
    pretty good from what little I understand so far.  I just don't want to
    try something, when I'm destined for failure....  no different than
    anyone else I guess.
    
    
                            thanks for the info,
    
                                               Gil
1446.6DSC in Maine does slope soaringHANNAH::REITHJim HANNAH:: Reith DSG1/2E6 235-8039Thu Aug 13 1992 14:0611
I built a modified Sig Ninja with twin fins to look something like an F-15. I 
put a tow hook on it and had some fun with it. This one was heavy so it didn't 
slope too well at our slope site but it was pretty impressive when it came 
screaming down in a split S after launch. Trouble was I beat the parachute down 
every flight so the fun was offset by the walking.

The Downeast Soaring Club has a slope site and does some significant slope 
soaring in Maine. The former president is Ken Baker and his phone number is 
listed in the glider contest topic. I'm not sure where they flue but it was 
almost 2 hours north of the sod farm they used to use in Biddeford. I don't 
know where this is with regards to you.
1446.7Club soaring in MayUNYEM::BLUMJThu Aug 13 1992 14:1216
    Gil,
    
       There is a group in Maine that slope soars.  I remember reading
    about them in Radio Control Soaring Digest(I think).  This club
    group builds the same ships and holds one design funflys/competitions.
    I believe the club had built Southwinds for thermal soaring and
    was using Bob MArtin Duralene fuselages with club cut foam S3021
    wings.  As the article stated, they would build extra wings and
    stabs to have as replacements for the inevitable breakage that
    occurs when learning to slope soar.
    
    Sounds like a good group to get in touch with.
    
                                                     Regards,
    
                                                     Jim 
1446.8That's themHANNAH::REITHJim HANNAH:: Reith DSG1/2E6 235-8039Thu Aug 13 1992 14:192
That's the DSC group. They wanted about $35 for the DSC-1 club kit. We used 
one of the fuselages for a baseball bat at one of the thermal contests.