[tccrockets] Re: The Crow 38
- From: chvy91bowtie@xxxxxxx
- To: tccrockets@xxxxxxxxxxxxx
- Date: Wed, 23 May 2012 13:17:11 -0400 (EDT)
No, the long motor doesn't make the rocket over stable but it is of course
more stable than the 3g and 4g motors. I'll have to go back and take a look at
my sims because its been a while but the rocket was designed around the 5g
motors and I only flew it on smaller motors for test flights which if I
remember correctly were just barely stable by a single caliber which worried me
a little because all the flights were going to be well over mach but all three
previous flights have been PERFECTLY straight. I do know that in my sims the
smallest motor I can fly it on and still have a caliber of stability is the 3g.
There is no nose weight added right now because none was needed due to the
short length of the airframe and long motor. I think this may have just been a
bad flight for one reason or another (wind? weird motor burn?) but maybe the
one grain longer length did make a difference. Tonight I will do some sim work
and if my memory is correct and I have a good margin I will fly it again on the
I540 and see what happens. If not then I guess I built the perfect rocket for
the 4g I470 because that was a beautiful flight!
-----Original Message-----
From: Sam Fineberg <sam@xxxxxxxxxxxx>
To: tccrockets <tccrockets@xxxxxxxxxxxxx>
Sent: Wed, May 23, 2012 8:54 am
Subject: [tccrockets] Re: The Crow 38
Does the longer motor make the rocket over-stable? In which case
moving up the CP might help (i.e., clipping the fins).
Sam
On 5/23/2012 8:36 AM, Rob Diehl wrote:
I thought smaller fins would increase coning.
From: save children <theacf@xxxxxxxxxxx>
To: tccrockets@xxxxxxxxxxxxx
Sent: Wed, May 23, 2012 8:29:23 AM
Subject: [tccrockets] Re: The Crow 38
Trim 1/2 inch off each fin tip to stop coning.
C
Date: Wed, 23 May 2012 12:27:19 +0000
From: karlbaum@xxxxxxxxxxx
To: tccrockets@xxxxxxxxxxxxx
Subject: [tccrockets] Re: The Crow 38
Maybe we should drag min diam 38s sometime? I still haven't
posted the numbers you have Chris! And you got your rocket
back? I would be very pleased.
Karl
From: "JACK GARIBALDI" <JackGaribaldi@xxxxxxx>
To: tccrockets@xxxxxxxxxxxxx
Cc: tccrockets@xxxxxxxxxxxxx
Sent: Tuesday, May 22, 2012 10:22:05 PM
Subject: [tccrockets] Re: The Crow 38
12,000 on an I motor nothing to complain about for sure
Jack
Sent from my Mil Spec IPhone 4S
On May 22, 2012, at 10:16 PM, "Rob Diehl"
<rwdiehl@xxxxxxxxxxxxx> wrote:
> Wow. Still some excellent numbers.
>
> -----Original Message-----
> From: tccrockets-bounce@xxxxxxxxxxxxx
[mailto:tccrockets-bounce@xxxxxxxxxxxxx] On Behalf Of Chris
Franco
> Sent: Tuesday, May 22, 2012 7:15 PM
> To: tccrockets@xxxxxxxxxxxxx
> Subject: [tccrockets] The Crow 38
>
> I was finally able to check out my numbers on my
Crow 38 rocket that flew Saturday on an I540. Very
disappointing but still cool. The rocket corkscrewed badly out
of the tower after flying perfectly straight its previous 3
flights. It pulled 93.77 gees for .81 seconds out of the tower,
hit mach at 207 ft and hit its max speed of 1353 mph at 679 ft.
The rocket only got to 11,693 agl. I was hoping for 16,000. The
coning killed much of my performance. Although I got a little
more altitude, I got more speed on a 3g skidmark I than I did
with the 5g full I motor. I will fly again soon and hope
for a better flight.
>
> Jack Garibaldi <jackgaribaldi@xxxxxxx> wrote:
>
>> Robin Meredith from the Tripoli board responded
and said there is no
>> age limitation under rule 2-18.1.1 so the
answer is yes children under
>> 18 can go on the High Power range when escorted
by a High Power flyer
>>
>>
>>
>>
>>
>>
>>
>> 2-18.1.1 Exception: Non-HPR Fliers are allowed
in the High Power Launch
>> Area if escorted by a HPR Flier. A HPR Flier
may escort and be
>> accompanied by not more than two (2) non-HPR
fliers in the High Power
>> Launch Area. The HPR flier escort is required
to monitor the actions of
>> the escorted non-HPR fliers, and the escort is
fully responsible for
>> those actions and for the safety of those
escorted.
>>
>>
>>
>> Glad I asked because that was very
contradicting and I thought
>> different myself
>>
>>
>>
>> Jack G
>>
>>
>>
>
>
--
Sam Fineberg
Sam@xxxxxxxxxxxx / K6SAF
NAR 91047 / TRA 13293 L2
LUNAR Secretary
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