With a tail cone moving CP forward, I decided to add a little nose weight.
Final wo motor: Weight 5.55#, CG 26.75"
With K1440 loaded: Weight 9.7#, CG 33"
Ready to rumble!
_____
From: roc-chat-bounce@xxxxxxxxxxxxx [mailto:roc-chat-bounce@xxxxxxxxxxxxx]
On Behalf Of Dave Peterson
Sent: Monday, June 08, 2015 6:41 PM
To: roc-chat@xxxxxxxxxxxxx
Subject: [roc-chat] Re: Punisher Drag Race
My Punisher is 51.5" with tail cone overall length. With an actual K1440,
the total weight is 9.33 lbs and the CG moves to 33.5" from the nose, just
like your K700.
Dave
_____
From: roc-chat-bounce@xxxxxxxxxxxxx [mailto:roc-chat-bounce@xxxxxxxxxxxxx]
On Behalf Of Kurt Gugisberg
Sent: Monday, June 08, 2015 5:20 PM
To: roc-chat@xxxxxxxxxxxxx
Subject: [roc-chat] Re: Punisher Drag Race
Mine is 51.625 inches with tail cone overall length. I wonder if you miss
measured or Wildman gave you an extra inch somewhere.
Kurt
On Mon, Jun 8, 2015 at 2:57 PM, Kenneth Harkema <kenrico2000@xxxxxxxxx>
wrote:
No slings or arrorws ..but how long is yours Kurt ?
Mine is showing 52.5 inches with the aeropack tailcone retainer ..
Tweaked RocSim is now showing 36" CP so lost another 1/2 inch (fin span
3.125 not 3.25")
Kenny
Kenny
On Mon, Jun 8, 2015 at 9:35 AM, Kurt Gugisberg <kurtgug@xxxxxxxxx> wrote:
I think some people are measuring the cg without all the electronics and
chutes in place. I get 27.75 without motor (with all the laundry and
electronics in place) and 33.5" with a K700 standing in for the K1440 (from
the tip). That includes 6 oz of weight I added to the top of the e bay
bulkhead. The added nose weight only moved the cg about a .5" forward but I
gained 50 feet in altitude according to the sims!
The CP I got with Open Rocket is 35" and from Winroc 34.73". That's with
the Aeropac tail cone.
Kurt
On Mon, Jun 8, 2015 at 9:17 AM, John Coker <john@xxxxxxxx> wrote:
What's the consensus on C.P.? That should be the same for all of us, at
least if we all built it stock.
It looks like my C.G. is pretty far back compared to others, so I will make
up a nose weight just in case.
John
On Mon, Jun 8, 2015 at 8:44 AM, Chris J Kobel <Chris.J.Kobel@xxxxxxxx>
wrote:
Here's what I have so far. I know most of this is preliminary since most of
us don't have our K1440s to check actual weight and balance. I will
continue to update as information comes in.
On Saturday before the Punisher launch, I'll have my digital scale to weigh
in each rocket and do a quick check of CG location.
No hurry- you still have 5 days :-)
Chris
Date: Time: Temp: W:
(Without Motor)
(With Motor)
(With Motor)
No
Flyer Name
Cell Phone #
Email Address
Rocket
Motor
Motor Retention
Drogue
Main
Altimeter
Tracking
Other
Main Deploy Alt
CG (from nose)
Ready-to-Fly Mass
CG (from nose)
Max Altitude
Max Velocity
1
Christopher Kobel (310) 890-9715 <tel:%28310%29%20890-9715>
<mailto:chris.j.kobel@xxxxxxxx> chris.j.kobel@xxxxxxxx
Punisher
Ces K1440WT
Aeropack standard
12" + mylar streamer - visual tracking
48" TF CrossFire
PF Stratologger CF
RocketHunter
E-charges: 2.5g drogue / 1.0g main
700 ft
2
Kurt Gugisberg <mailto:kurtgug@xxxxxxxxx> kurtgug@xxxxxxxxx
Punisher
Ces K1440WT
Aeropack boattail
12"
44"
Stratologger CF
Big Red Bee GPS
700 ft
27.75"
5.62 lb (2550g)
33.5" (6 oz noseweight)
3
Greg Halligan (562)458-5684 <tel:%28562%29458-5684>
<mailto:tgh218@xxxxxxx> tgh218@xxxxxxx
Punisher
Ces K1440WT / AT L1000W
Aeropack
Perfectflight X2
RocketHunter
700 ft
4
John Coker (650) 302-1555 <mailto:john@xxxxxxxx> john@xxxxxxxx
Punisher
Ces K1440WT
Slim Line
12"
48" Elliptical
TeleMetrum
TeleMetrum
700 ft
31.25"
3.5 lb (w/o Motor)
5
Mike Kramer <mailto:mike@xxxxxxxxxxxx> mike@xxxxxxxxxxxx
Punisher
Ces K1440WT
Homemade snap ring
12" (or drogueless)
48"
Stratologger CF
RocketHunter
Cobra Dash Cam
700 ft
6
David Reese <mailto:dareese@xxxxxxxxx> dareese@xxxxxxxxx
Punisher
Ces K1440WT
Aeropack standard
maybe
RRC2+
ComSpec/RocketHunter ch. 451
500 ft
28.5"
8.29 lb
33.5"
7
Kenneth Harkema <mailto:kenrico2000@xxxxxxxxx>
kenrico2000@xxxxxxxxx
Punisher
Ces K1440WT
Aeropack boattail
TBD
8
David Smith <mailto:davew6dps@xxxxxxxxx> davew6dps@xxxxxxxxx
Punisher
Ces K1440WT
Aeropack
TBD, streamer?
TBD
Stratologger SL
custom APRS (GPS), 433.55 MHz
29.6"
~4 lbs (w/o motor)
9
Robert Patrick Lees <mailto:rlees001@xxxxxxx> rlees001@xxxxxxx
Punisher
Ces K1440WT
Aeropack
8" Fruity
48" Iris Fruity chute or ?
Telemetrum - 434.050 Mhz
GPS and Radio Direction Finding
820 ft
28"
4.2 lbs (w/o motor)
(with nose weight)
10
Dave Peterson <mailto:woshugui@xxxxxxxxxxxxx>
woshugui@xxxxxxxxxxxxx
Punisher
Ces K1440WT
Aeropack boattail
12" Fruity
30" Recon
RRC3 & RRC2+
EggFinder 913MHz
Mobius HD camera (inside airframe)
28.3"
5.2 lbs (w/o motor)
11
Greg Smith
Punisher
Ces K1440WT
12
Rick Dickinson <mailto:rtd@xxxxxxxxxxxx> rtd@xxxxxxxxxxxx
Punisher
Ces K1440WT
RRC3 & RRC2+
--
Kenneth Harkema
Mobile: 619-248-4716
