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Old 08-29-2012, 03:04 PM
Altitude Junkie Altitude Junkie is offline
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Join Date: Aug 2012
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Default Von Delius blasts TRA J and K records on same day

Von Delius blasts TRA J and K records on same day

August 16, 2012

Curt von Delius flying his state of the art JMAX has again set the new TRA certified single stage J class altitude record of 23,735’ AGL, eclipsing his previous record of 19,758’ by a full 20% or 3977’. The flight was made at AeroPacs’ Aeronaut launch on August 3rd in the Blackrock Desert.

Later that day with his ultra lightweight KMAX, von Delius set a new TRA certified single stage K altitude record of 31,643’ AGL beating the existing record by better than 8%, proving that a K class rocket can fly over 30,000’ feet.

JMAX - This is his third attempt with the new design powered by an Aerotech J510W. “It all came together for this flight, perfect surface and winds aloft and a very straight boost”. “It’s great to have finally broken 20,000 feet with a J Class rocket, heck, nearly 24,000 feet!” von Delius said. “Amazingly, the actual altitude flight data was within 14’ feet of the simulations.” The J510W burns for 2.37 seconds accelerating the JMAX to Mach 2.7 or just over 2000 miles per hour and pulling a max 80 gees. One veteran spectator commented “That rocket was honking out of the pad.”

KMAX – The latest KMAX design is Curt’s fourth attempt to set a new K record. “The previous flights have led to design refinements which made this flight possible” said von Delius. “Last year we missed the record by 45’ feet.” Powered by a long burning Cesaroni K300, the KMAX
hits Mach 2.2 while pulling 20.72 gees. “We knew it had gone really high when it took eight minutes to touch down” said Curt.

Von Delius’ tower launched designs utilize CAD designed carbon fiber, quartz fiber and lightweight CNC aluminum structures as well as, his own custom chutes and deployment.
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Old 08-29-2012, 04:28 PM
Gus's Avatar
Gus Gus is offline
Join Date: Sep 2005
Location: North of Detroit
Posts: 2,024


Really beautifully crafted rockets.

Would you please share a bit about their development? Nosecone shapes look purpose-built.

And i'm really curious why you didn't choose longer burning, lower max impulse motors.

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