blackjack2564
Crazy Jim's Gone Banana's
Does anyone have information on how the TeleMega deals with rocket spin or what amount of spin it can sustain and still have good tilt measurement? For example, the RockeTiltometer manual says it can handle 520 degrees per second of spin (~93 RPM) and not affect the tilt calculations. Is there any similar information on the TeleMega?
The limit of the sensor is 2000 degrees[2000/360=5.56] or 5.56 rps......look at graph of high thrust motor in spin-stabilized rocket [ my 1/3 scale Sparrow-Arcus.......
At .4 sec into flight rotation reaches 5-6 revolutions and sensor pegs............
This is checked by overlaying magnetometer over graph. You can count peaks between 1 second & 1.4 second...it's right at 5.5! Rocket was spinning at 15-16 RPS.
How I intend to keep things flying straight with my 2-stage.
So any spin over 4-5 rps will negate use of tilt. Found this out during first flight.
Rocket was nutz straight, but sustainer did not fire. Limit of sensor is right in specs at 2000.
You lose about .5 or 1/2 degree of accuracy with the tilt control for every 1 second of coast.
12 second coast could easily be off by 6 degrees.
These facts were confirmed by Keith after discussion of my flights. I needed to determine roll rate, so I began using the magnetic field sensors and counting peaks between time.
All must be considered when setting limits.
Last edited: