Click on the photo above to load a video of this flight (1.1 meg MPG file, 6 seconds of video)	Quick summary: Flight duration:  Thrust duration: Altitude at apogee:  Fuel Weight:  Nozzle throat:  Launch weight: Total Impulse:	6.14 seconds 0.5 seconds 41 meters 120.7 grams KN/sucrose 5/16 inch 4.25kg 131 N-sec

Details:  Spreadsheet output:
 

LumberCalc	Version 1d			Data from Flight 12-24-01A	Flying  4X4 flight 3
Measured:				Calculated:
Distance *	Feet	Meters		Rise/Run at apogee:	0.722993	< ratio of height on pole at apogee / distance to pole
A. Camera to measuring pole	4.61	1.405059		Rise/Run at burnout:	0.125813	< height on pole at burnout / distance to pole
B. Camera to launcher	276.2	84.18165
C. Camera to touchdown	197.1	60.07315		Height at apogee:	52.14764	< distance to apogee * rise/run ratio at apogee
D. Launcher to touchdown	80.3	24.47425		Height at burnout:	10.59118	< distance to burnout * rise/run ratio at burnout
E. Rise on pole at burnout	0.58	0.176775		Rise height after burnout:	41.55646	< height at apogee - height at burnout
F. Rise on pole at apogee	3.333	1.015849	<*Note
* Letters A-F refer to drawing on Sheet 2				Rise time, burnout to apogee:	2.9122	< calculated from rise height, deceleration by gravity
				Time, launch to apogee	3.5922	< boost time + rise time
Time	Seconds			Fall time, apogee to ground	3.262265	< calculated from height at apogee & gravity
Thrust duration	0.68			Total Flight time (calculated)	6.854466	< calculated boost + rise + fall time)
Descent from apogee	2.9795	<* Note		%Error between flight times:	-0.04505	< comparing measured vs. calculated times
Total flight time (measured)	6.559
				Velocity at burnout (m/sec)	28.53956	< calculated from rise height, deceleration by gravity
Weight	Kilograms			Acceleration, actual (m/s^2)	41.96994	< velocity at burnout / thrust duration
Fuel charge	0.1427			Acceleration, felt (m/s^2)	51.76994	< actual acceleration + gravity
Total launch weight	4.856			Thrust (Newtons)	251.3948	< felt acceleration * total weight
				Total Impulse (N-Sec)	170.9485	< thrust * thrust duration
				Isp (N-Sec/kg)	1197.957	< total impulse / mass of fuel charge
Jimmy Yawn				Seconds	122.2405	< Isp / gravity
jyawn@sfcc.net
12/16/01				Height (of doubtful accuracy)	43.49936	< calculated from measured fall time

 

Click here to download a copy of this spreadsheet, Excel format

Events:
Ignition switch click is not identifiable in this graph.
1.6seconds, Thrust begins
2.3 seconds, burnout
8.25 seconds, vehicle hits ground

Note that the launcher is 276 feet from the camera, causing a delay of about 0.25 second between the visual event and its sound.

JY
12/30/01