Hi Steve, what controller are you using to control the fins, and is it
custom software?
-Gene
- Regards
Gene Engelgau
Web: http://fruitychutes.com - Professional Aerospace Recovery Systems
Facebook: facebook.com/fruitychutes
Twitter: @fruitychutes
Cell: 408-499-9050
On Sat, Mar 21, 2020 at 9:43 PM steve ainsworth <sainsworth777@xxxxxxxxx>
wrote:
The first flight on a longburn J (at Blackrock) used plywood fins. The
small servos were enough to deflect the control surfaces sufficient to
cause two of the plywood fins to fail at the fin can.
The upgrade has larger servos and aluminum fins with 4 Large Scale RC
plane hinges on each fin. It is a 2.5" Dia rocket
Send me your email address offlist if you would like to get the video.
Also, Apogee Rockets published an article about it.
Keep me posted on your progress!
Steve
On Sat, Mar 21, 2020 at 5:09 PM Gene Engelgau <gene.engelgau@xxxxxxxxx>
wrote:
So those are "nano" servos that weight just a few grams. Do they have
the torque needed to really control the fin? So no flutter issues, it
seems you have flown this? Looks like an away cell rocket to me!
-Gene
- Regards
Gene Engelgau
Web: http://fruitychutes.com - Professional Aerospace Recovery Systems
Facebook: facebook.com/fruitychutes
Twitter: @fruitychutes
Cell: 408-499-9050
On Sat, Mar 21, 2020 at 3:56 PM steve ainsworth <sainsworth777@xxxxxxxxx>
wrote:
Pete
Your project sounds interesting. Any plans for photos or video of
flights?
Here are pics from XPRS 2018 of one of my VTS rockets.
On Sat, Mar 21, 2020 at 1:55 PM Pete <pjbevel@xxxxxxxxx> wrote:
Upload to youtube and share it :)
For gyro stabilization:
- Basically conservation of angular momentum [which has units of
kg-m^2/s]. Not spinning the whole rocket, just an internal spinning disc
- I did some experiments and roughly 1 kg-m^2/s of angular momentum can
offset/oppose torque of 1 N-m
- Angular Momentum = Inertia [kg-m^2]*spin rate [radians/second].
- If you estimate what torque you might see on your rocket using
whatever assumptions you want, you could estimate the required angular
momentum
- then figure out what the corresponding inertia and spin rate is, and
we'll see what happens!
On Sat, Mar 21, 2020 at 1:24 PM steve ainsworth <
sainsworth777@xxxxxxxxx> wrote:
I would like to hear more about the gyro stabilization system!
Is there a way I can share video from my VTS system rocket? I have
some cool onboard video where you can watch the control surfaces move with
the ground in the background.
Steve
On Sat, Mar 21, 2020 at 1:10 PM Bruce Rohn <bhrohn@xxxxxxxxx> wrote:
sounds like this "downtime" for everyone is more productive than
normal living would hve been!!
My hats off to all you folks!!
On Saturday, March 21, 2020, Pete <pjbevel@xxxxxxxxx> wrote:
Some experiments this week while the kids are away, with pictures:
- ejection test, 1g of black powder (by the way, where does everyone
get their black powder? I can find some pyrodex P powder)
- some hand made circuit board design for dc motor control
- experimental gyroscopic stabilization system
@ James - unlocked GPS is unlimited altitude?
On Sat, Mar 21, 2020 at 12:26 PM Toby Vanderbeek <
tobyvanderbeek@xxxxxxxxx> wrote:
I have the Defiance but my build list is really long and that one
is low in priority. I hope you post about it on Facebook for us to see.
Regards,
Toby Vanderbeek
tobyvanderbeek@xxxxxxxxx
On Sat, Mar 21, 2020 at 12:24 PM <matt_powell@xxxxxxxxxxx> wrote:
I am lucky to be able to work from home current project high speed
juice box packaging machine. Current rocket Madcow 4” Defiance (54mm)
thinking about adding a video system.
TCC had a thread with the pi- Does anyone have an update for part
list or is there other system that have multi-channel video.
Kenneth is working on another Tomach and also designing
(Solidworks/Rocksim) his Madcow Frenzy Massive for level 3
Matt
*From:* tccrockets-bounce@xxxxxxxxxxxxx <
tccrockets-bounce@xxxxxxxxxxxxx> *On Behalf Of *Ralovley
(Redacted sender "Ralovley" for DMARC)
*Sent:* Saturday, March 21, 2020 11:10 AM
*To:* tccrockets@xxxxxxxxxxxxx
*Subject:* [tccrockets] Build Time
Just thought I would start a new conversation on the positive
side! With the down time we are all having, what is everyone working
on? I
have quite a few rockets in the works, and will be building Avbays
all
weekend!
What you guys building?🚀
Rod
Sent from my Verizon, Samsung Galaxy smartphone
