Jay, Craig, Bill

I have been planning to build tau zero for sum time, so finding that it has instability problem is no big deal.
Os i order the parts and body tubes, rocket Kits from semroc

Seeing that is going be my first (semroc?) non estes kit (the Estes kit are starting go down hill) (Estes space ship one sucks, and 36DD? ok ho the designer at Estes ho go to hootes, just jugging or is joking).

Well if I don't include all my own design and all the flis kits I have.

This is going to be fun rocket to build and love to see semroc make it one of there kits. (BIG HINT)
Next on my build list will be Prometheus.

__________________
Andrew Scott

M.M.R.G. #00001 L1

N.A.R. #51647 L1

T.R.A. #10404 L1

e-bay. Proving PT Barnum was right

But let's keep in mind, please, that 0.86 or 0.95 calibers of stability *are* stable designs, just not quite as stable as 1.56 calibers. A design that Rocksim calls marginally stable *is* stable. A design with 0.86 calibers of stability will *not* pinwheel off the launch pad.

Whether or not the real rocket, once it's built, has the same margin of stability as that predicted by Rocksim is the real issue. And apparently Jay's *real* Tau Zero was not as stable as Rocksim predicted it would be.

(Jay, I don't recall if you're using the Rocksim or Barrowman stability calcs. If I recall correctly, the Barrowman calcs are generally more conservative than the Rocksim ones. That is, the Barrowman calcs generally say a design is at least somewhat less stable than the Rocksim stability calcs do.)

__________________
John Thro, NAR #84553 SR
I was too old when I started! Now I'll *never* become a BAR!

(serious look) And did you *vote* for it?


Make sure the "exposed" part of your elastic shock cord is at least 3 feet long. (Or maybe a meter. ) And get ready, because it will *rip* off the pad. (Get yourself an extra-good tracker.)


Cheers,

__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

And I thought *I* was relatively stable. To complicate the issue, a few onlookers occasionally question Bill's stability (I know how that feels), but *his* Tau Zero flew just fine on a C6-7.

I just got done ordering some bigger screw eyes (SE-14) as well as nose weights (WL-7) from Semroc. The Tau Zero has taken more test flights than I initially expected, but I think the "real world" experience will pay off for the rest of you who decide to build one.


Indeed. I'm using the RockSim calculations. (Because of the tube fin, and all that.)

I ordered the SLS 175% upscale of the BC-760 nose cone, too.


Cheers,

__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

Apparently I've already voted for it because when I tried tonight it wouldn't count my vote.
I also noticed that someone has been voting for Semroc to produce currently available Quest kits. The Big Betty even has six votes. Isn't that kinda stupid?

__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Marauder, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Multi-Roc, Solar Sailer II Semroc Cyber III

Ready to fly: Estes - Solar Sailer II Semroc - Earmark, Groonie Der V 1/2

I figured you already had. If I remember correctly, you can only vote once per computer. (Or something like that. )

*Somebody* voted today, though. It only had 23 votes earlier while I was at work this afternoon.


Yeah, I find it kind of odd that "currently available" kits are on Carl's list. Hmm...


Thinking (superficially) deep thoughts,

__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014

Hmmnn hmmnn hmmnn ...

__________________
Craig McGraw

BARCLONE Rocketry -- http://barclone.rocketshoppe.com
BARCLONE Blogsite -- http://barclone.wordpress.com
BARCLONE Forum -- BARCLONE Forum

BARs helping BARs

SAM 0044
AMA 352635

Makes perfect sense to me. They're just saying Carl could package a better kit version with better-quality components than Quest has been doing, even if the price might be a little higher. Think about Quest's parts compared to Carl's...

__________________
Craig McGraw

BARCLONE Rocketry -- http://barclone.rocketshoppe.com
BARCLONE Blogsite -- http://barclone.wordpress.com
BARCLONE Forum -- BARCLONE Forum

BARs helping BARs

SAM 0044
AMA 352635

Think about the designs.

__________________
Bill Eichelberger
NAR 79563

http://wallyum.blogspot.com/

I miss being SAM 0058

Build floor: Centuri Design Contest F-150 Hurricane Estes - Low Boom SST Semroc - Marauder, Shrike, SST Shuttle

In paint: Canaroc Starfighter Scorpion Estes F-22 Air Superiority Fighter, Multi-Roc, Solar Sailer II Semroc Cyber III

Ready to fly: Estes - Solar Sailer II Semroc - Earmark, Groonie Der V 1/2

Good news, Craig. This makes you Somebody.


Cheers,

--Jay

__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131


"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "

--Bill Eichelberger, 02/22/2022


“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014