Deltie Thunder Air Show

gshaiffer

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IMG_0971.jpg
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
 

jadebox

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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
 

samb

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That is an extremely nice liftoff shot. More please ! How did you build the upscale ? Did you work from an old kit ?
 

gshaiffer

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IMG_0971.jpg IMG_0975.jpg IMG_1015.jpg IMG_1025.jpg IMG_1121.jpg IMG_1041.jpg IMG_1089.jpg IMG_0971.jpg I 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.
 

gshaiffer

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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.
 

samb

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Awesome project. Boost gliders are the coolest. :) Welcome to the forum BTW.
 

Lowpuller

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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.
 

Daddyisabar

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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!
 
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