About

Gender

Male


Location

El Cajon


About Me:

Design and fly high power model rockets...


Please tell us a bit about your UAV interest

frankhermes.com


Hometown:

El Cajon


Activity Feed

Frank Hermes commented on William Premerlani's blog post sustained rotations : pushing the envelope
"Mark/Bill...
Better site ref is www.RocketElectronics.com since everything is aggregated there on the background and current state of the RockeTiltometer...working on RTOM2 now and expect it will implement a magnetometer and Bill's new code so I can…"
Jun 13, 2011
Frank Hermes left a comment for William Premerlani
"Excellent...thanks, Frank"
Oct 20, 2009
Frank Hermes left a comment for William Premerlani
"Hi Bill...

Been looking into the gyro thing and boiled it down to the AD ADIS16360 (http://www.analog.com/en/sensors/inertial-sensors/adis16360/product...) since it seems to have all the required ingredients, including a rating up to +/-18 g.…"
Oct 20, 2009
Frank Hermes left a comment for William Premerlani
"Thanks Bill - your response (re the time frame of flight and need to correct) is what my partner-in-crime here suspected...I appreciate your offer to help...I was hoping to find something more off-the-shelf since there is no way I would be able to…"
Oct 6, 2009
Frank Hermes left a comment for William Premerlani
"Oh yeah, Bill, this is a link to the AHRS they used...

http://www.microstrain.com/3dm-gx2.aspx"
Oct 6, 2009
Frank Hermes left a comment for William Premerlani
"Hi Bill…

The initial goal is to provide a signal (based upon degrees of tilt of rocket tip from vertical) to either inhibit, or possibly trigger, second-stage (sustainer) motor ignition after burnout of the first-stage (booster) motor. The effort…"
Oct 6, 2009
Frank Hermes left a comment for William Premerlani
"Hi Bill,

Thanks for the further thoughts...I follow you until you get to the magnetometer and the issue of the single vector availability...so even though you have two or three magnetometers available you still only get one real ref - I guess that…"
Oct 5, 2009
Frank Hermes left a comment for William Premerlani
"Hi Bill...
I have a graph taken from one of the simulation programs we use to design the rockets (RockSim); it represents a typical rocket flight from liftoff to apogee...thought it might help you get a sense of the forces involved...

Curious as to…"
Sep 30, 2009
Frank Hermes left a comment for William Premerlani
"Hi Bill,

No I do not mind (publishing), but I appreciate your asking - as you can tell, I am very ignorant in this area, and humbled when i read through all the guys out there that are so knowledgeable, but doing my best to learn...I appreciate…"
Sep 28, 2009
Frank Hermes posted a discussion
I would like to enclose the H-IR sensor into a 4" round housing - any issue (e.g., timing, calibration, shielding) with unsoldering the sensor elements and extending them out and remounting to a 4" diameter a circuit board and bringing the leads…
Sep 26, 2009