Flight Log - 2013-06-30 - Rich DeAngelis's Sprint

T' Sprint: This Astron Sprint is from t' original '70s kit. Begad! It uses streamer recovery, me hearties, but I changed it out for a small 8" parachute. Ahoy! 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. Well, blow me down! Instead it has t' boattail end designed t' reduce drag. This rocket was later given my "Iris" modification, which extends t' body tube about 5 inches above t' streamer/parachute bay, shiver me timbers, and allows for a payload with an Altimeter One t' measure altitudes.

After this payload section be tragically lost when t' screw-eye/balsa joint failed, I built a newer, lighter and smaller payload section. 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, but t' plastic seems t' stick t' body tube because o' static electricity, so I replaced it again with a small 8" parachute. With this parachute it descends at about 9 mph, soft enough for a safe grass landing. Avast! 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. She is a messenger o' t' gods, linkin' t' gods with humanity.) This rocket has flown higher than t' NY Times Buildin' in NY, t' John Hancock Tower, ya bilge rat, 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. 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, ya bilge rat, burnin' for one full second and sustainin' 5.9 Gs. Avast, me proud beauty! 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, only 1/10 second went by before t' ejection fired 5.4 seconds after thrust, with t' rocket only fallin' 4 feet. T' small 8” chute opened cleanly and t' rocket came back at 15 mph.  Flight time be 31.7 seconds.  This be t' second very successful flight o' t' Sprint today, and it wouldn’t be its last.

StageMotor(s)
1Estes B6-6

 

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