#11
|
||||
|
||||
Agreed on the “distinction without a difference” in the model rocketry context….
And it looks like the folks at Estes agree. The verbiage about “center of mass” is gone from the description of the Rocket Stability Kit.
__________________
Bernard Cawley NAR 89040 L1 - Life Member SAM 0061 AMA 42160 KG7AIE |
#12
|
||||
|
||||
Quote:
Administrators don't know anything has worth unless you can put a $ value on it. ... I've ordered one. I'm a sucker for widgets, and the string test widget is sweet. Dummy motor weights are fun, too. And, hey, more spare parts.
__________________
Bob Portnell, Sparks, Nevada NAR #87762, NARTREK Silver, Not an actual Silver Snoopy awardee "Flying Like It's 1980" |
#13
|
||||
|
||||
Quote:
Considering what the Public "schools" are teaching, nowadays, and the fact that Students are "saddled" with Common Core math, it will make no difference in the "big picture". Dave F. |
#14
|
||||
|
||||
My Stability Kit arrived on Labor Day ... five days after ordering, which is some kind of fast in the current shipping world.
The instructions have you build three fin cans, each with a coupler and a different fin set. Then you've got more body tube lengths and couplers, and three (PNC-50KA) noses plus a couple pats of clay to mix-and-match. And then the plastic grip and fixtures for performing swing tests, plus three dummy motors (A, B, C). And instructions with a lot of "DO NOT FLY ON REAL ENGINES" labels. And a really sturdy box. I bought it for the widgets and the spare parts. And the spare parts are going to work right away, since a motor tube in a kit also in the shipment was squashed mostly flat. Another motor tube is getting repurposed as a payload bay. For my part, a satisfying purchase.
__________________
Bob Portnell, Sparks, Nevada NAR #87762, NARTREK Silver, Not an actual Silver Snoopy awardee "Flying Like It's 1980" |
Thread Tools | Search this Thread |
Display Modes | |
|
|