>What I'd like to do is put a D engine in a Sidewinder. I have seen
>notes on this that mentioned tube sizes, hence my question above about
>sources for tubes.
>The interest in Aerotech engines is to see if I can get one that fits
>in a C engine mount, but has more power - for my existing Sidewinder.
I'm real new to this too, probably newer than you. AeroTech makes an
18mm "D" motor (D21 I think). Don't know if it will fit in the same
mount as the Estes 18mm motor, though. I've got a SkyWinder that I'd
like to try a "D" in. Hopefully someone can answer that question for
both of us.
>I read a recent letter about a multistage conversion of a Big Bertha.
>The writer used acronyms I could't decipher. Can someone explain how
>to do this?
CHAD staging? I had asked the same question. It's CHeap And Dirty.
Just tape the booster motor onto the one installed in the rocket.
This will move the center of gravity quite a way aft, though, and
many models will not be stable in this configuration.
>I also recently launched a Tornado into a light wind. It just floated
>away - worse than a parachute recovery. That was the second lost
>rocket in about 2 months.
My son took his Twister (aka Tornado) for a launch at school last Monday
(summer school enrichment science class). It was short notice, and
I was unable to find any 1/2A engines locally, so I set him up with an
A8-3 and crossed my fingers. He tells me it was a very impressive
flight (reportedly -into- the clouds) and with help from the rest of
the class, they recoved both pieces. One was 3 blocks away in someones