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  1. #1
    Join Date
    11th January 2017
    Posts
    3

    Deltie Thunder Air Show

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    Photo by Deanna Mann
    This is a scratch built trios of Deltie Thunder Gliders on a scratch booster
    TTW fin attachment standard glider hook on fin tips
    Motor was a Cesaroni H-54 delay drilled to about 4 to 5 sec. A little long 3sec would have been better.
    Flown at SCORE on 15 July 2017
    George Shaiffer


  2. #2
    Join Date
    18th January 2009
    Location
    Oviedo, FL
    Posts
    5,196
    And I always had a hard enough time recovering just one of them. :-)

    I usually flew my Deltie Thunder on an E15 motor. A D12 didn't seem to get it high enough. The E, through, gave it room to soar, which it often did - across the field, across the road, across the next field ...

    Do you have any more photos or video? That looks really cool!

    -- Roger


  3. #3
    Join Date
    22nd January 2009
    Location
    Plano, TX
    Posts
    3,051
    That is an extremely nice liftoff shot. More please ! How did you build the upscale ? Did you work from an old kit ?

  4. #4
    Join Date
    11th January 2017
    Posts
    3
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ID:	325543I was fortunate enough to fly in front of a large group! Two of the three flew nearly a quarter mile in opposite directions. One landed about 500 ft from pad.
    I used 3/16" basswood for the boom, balsa tends to snap in front of the wings. I'm not sure if the detail will show but Deanna Mann captured a one in a million photo of one of the gliders hitting the booster! Slight damage to the left wing on recovery was found, photo confirmed it was not damage from the landing.

  5. #5
    Join Date
    11th January 2017
    Posts
    3
    This was the second flight attempt. Last year's attempt resulted in balsa confetti from two of the gliders; third was lost the next day on standard boost configuration. Two of those were original kits.
    These were built using templates provided by Dave Virga plus he loaned a built 'Thunder glider to use for comparison/measurements. Dave successfully flew an original Deltie Air Show earlier that same day.
    It was the existence of Dave's Air Show that caused him to issue the challenge to build a 'Thunder Air Show. There was concern that the H-54 long burn motor would not have adequate thrust on that first attempt
    so an H-95?? was used on the first attempt. An impressive failure with all the balsa falling. Since booster recovered with no damage I decided to build three more gliders and make another attempt with the original motor that I had planned to use.

  6. #6
    Join Date
    22nd January 2009
    Location
    Plano, TX
    Posts
    3,051
    Awesome project. Boost gliders are the coolest. Welcome to the forum BTW.

  7. #7
    Join Date
    18th January 2009
    Location
    Rocky Hill, CT
    Posts
    3,467
    I could never get the gliders to stay on the rocket while on the pad.
    Al Gloer - TRA/NAR L3 (President Emeritus - CATO)
    2017 - The Year of the Bike Redux - 2,234 miles to go

  8. #8
    Join Date
    16th August 2016
    Location
    Paragould, Arkansas USA
    Posts
    264
    Outstanding!!!
    "Lock S-foils in attack position....."

  9. #9
    Join Date
    23rd November 2013
    Posts
    2,206
    I have a Deltie Air Show, I have flown it twice, great flights both times.

    But I agree you have to have lots of help because parts go everywhere.

  10. #10
    Join Date
    23rd November 2013
    Posts
    2,206
    Click image for larger version. 

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  11. #11
    Join Date
    24th January 2009
    Location
    Littleton, Colorado
    Posts
    3,995
    I was there to see this. It was awesome! Big gliders flying every where, a real mid air collision, miraculous recovery of the one glider where your clay weight on the wing got knocked off, making it fly straight towards the canyon!

  12. #12
    Join Date
    27th August 2011
    Location
    West Tennessee
    Posts
    2,662
    congrats on a nice bird and great flight(s?)!
    It is amazing what you can do when you don't have a choice.

    Smart people learn from their mistakes.
    REALLY SMART PEOPLE learn from OTHERS' mistakes.

  13. #13
    Join Date
    18th January 2009
    Location
    Maryland
    Posts
    11,527
    That's really cool, glad all of the parts were recovered.

    Dick Stafford
    The member formerly known as the Pointy-Haired Moderator.
    The Original Rocket Dungeon
    Volunteer compiler of product news for ROCKETS Magazine

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