An idea occurred (always a surprise): The rocket's acceleration increases from 1 g as the mass of fuel is ejected energetically, according to f=ma, with pretty constant force from the motor. At some point, the fuel and oxidizer tanks are empty (MECO), causing the acceleration to revert to 1 g or less, depending on altitude. The change from max acceleration to free flight offers an opportunity to calibrate the effect of max g on the oscillator. The velocity is almost unchanged at that point, so the change in Doppler shift comes only from the effect of acceleration on the oscillator. It should be possible to use linear interpolation for the effect of acceleration during powered flight, since f=ma is a first order equation.
Bill Hawkins -----Original Message----- From: Bob Camp Sent: Saturday, March 28, 2015 6:22 PM The point being that, to even get acceleration into the picture, you need have impossibly high accelerations . At 10 G, your oscillator needs to be temperature stable to < 0.01C to even see the acceleration. If you are climbing 100K feet during the acceleration phase the oscillator will see a *lot* more than that. Bob > On Mar 28, 2015, at 5:01 PM, Jim Lux <[email protected]> wrote: > > On 3/28/15 10:27 AM, Bob Camp wrote: >> So If the rocket continuously accelerates at 10,000 G's, you will >> get a 20 ppm shift with typical sensitivity. If you do this for very long, you will also get into time dilation issues. >> (you hit 0.1C in < 2 minutes). > > 10,000G is more like an artillery shell. > > A large amateur rocket might be more like 20-30G maximum. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
