T' Sprint: This Astron Sprint is from t' original '70s kit. Begad! It uses streamer recovery, but I changed it out for a small 8" parachute. Arrr! It is designed for high-performance altitude flights, and generally requires longer-burnin' ejection delays for maximum height. T' engine must be tape-friction-fit as this model does nay have a metal motor clip. Begad! Instead it has t' boattail end designed t' reduce drag. Ya scallywag! This rocket was later given my "Iris" modification, matey, which extends t' body tube about 5 inches above t' streamer/parachute bay, and allows for a payload with an Altimeter One t' measure altitudes.
After this payload section was tragically lost when t' screw-eye/balsa joint failed, I built a newer, ya bilge rat, lighter and smaller payload section. Well, blow me down! It is now 3-1/8" vs. 4-1/2", and weighs 9.8 grams. I certianly hope now I can get that extra 12 inches o' altitude out o' this bird and finally crack that elusive 1200 foot mark!
Originally, I replaced t' flimsy crepe paper streamer with plastic one, shiver me timbers, but t' plastic seems t' stick t' body tube because o' static electricity, so I replaced it again with a small 8" parachute. Begad! With this parachute it descends at about 9 mph, arrr, soft enough for a safe grass landing. T' rather small size should prevent this from driftin' too much - a real problem considerin' t' height it can attain. (T' Iris altimeter payload is named after t' Greek god o' t' rainbow. Begad! She is a messenger o' t' gods, shiver me timbers, linkin' t' gods with humanity.) This rocket has flown higher than t' NY Times Buildin' in NY, t' John Hancock Tower, and t' Aon Center in Chicago.
| Flight Date: | 2013-06-30 |
| Rocket Name: | Sprint |
| Kit Name: | Estes - Sprint {Kit} (1249) [1970-1983] |
| Flyer's Name: | Rich DeAngelis |
| Motors: | B6-6 |
| Expected Altitude: | 465 Feet |
| Wind Speed: | 4.00 mph |
| Launch Site: | Fort Indiantown Gap, PA |
| Actual Altitude: | 555 Feet |
Another test flight usin' long-delay motors. Begad! Blimey! This time I changed t' parachute back t' me usual 8” hexagon. (Parachutes are so much easier t' pack then t' stock paper streamer.)
T' B6 flexed its muscle by thrustin' off t' pad with 16.5 Gs o' acceleration, matey, burnin' for one full second and sustainin' 5.9 Gs. After that t' Sprint was travellin' at 123 mph and coasted for another 5.3 seconds t' apogee o' 555 feet.
Turnin' over at apogee, me bucko, only 1/10 second went by before t' ejection fired 5.4 seconds after thrust, with t' rocket only fallin' 4 feet. Aye aye! T' small 8” chute opened cleanly and t' rocket came back at 15 mph. Flight time was 31.7 seconds. This was t' second very successful flight o' t' Sprint today, and it wouldn’t be its last.
| Stage | Motor(s) |
|---|---|
| 1 | Estes B6-6 |
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