It was lightly cloudy and about 70 degrees but the wind was a problem. When we started it was blowing 15-20 mph, but as the day went on it increased to 20-30 mph. This made for some really lengthy walks. We didn’t get to lauch very many rockets but as usual, we had a great time.
Kevin’s Estes Olympus D12-5
Max Altitude (Feet) 598
Top Speed (MPH) 119
Thrust Time (Sec) 105
Peak Acceleration (G) 15.2
Average Acceleration (G) 3.6
Coast to Apogee (Sec) 5.3
Apogee Ejection (Sec) 0.2
Ejection Altitude (Ft) 592
Descent Rate (MPH) 9
Total Flight Time (Sec) 49.5
Altitude – 638 Feet
Altitude – 273 Feet
The Estes Astron Sprint XL is a new model displayed in the 2013 Estes catalog. It is an upscale release of the original Sprint model designed by Mike Dorffler as noted in the XL instructions. It was model number K-49 and flew on 1/2 A6-2 , A8-3, B4-4, B6-6 and C6-7 motors, and was introduced in 1970. It originally had a streamer for recovery. The larger XL version comes with a 15″ parachute and laser cut fins. Dorffler also designed the Astron Omega (K-52), Saros (K-54), Astron Alpha III (K-56) and the Cineroc (CM-8).
Estes Astron Sprint XL
- Decals: Waterslide
- Diameter: 1.64 inches
- Fin Material: Balsa
- Length: 22.80 inches
- Manufacturer: Estes
- Model: 007224
- Product Type: Kit
- Production Years: 2013-
- Recommended Motors: C11-3, D12-5, E12-6, E12-8, E9-6, E9-8
- Recovery: Parachute
- Skill Level: 2
- Style: Sport
- Weight: 3.40 ounces
Further Reading
Sources
- Spacemodeling https://www.spacemodeling.org/jimz/estes/k-49.pdf
- Vintage Estes Rockets http://www.vintageestesrockets.com/k-kit-registry/designers/mike-dorffler.htm
