Estes website

Well, it still doesn't work with Mozilla...

Bob Kaplow NAR # 18L TRA # "Impeach the TRA BoD" >>> To reply, remove the TRABoD!

What's wrong with you using a "standards based" browser (Safari is wacky on many sites too).

Don't you know many sites are authored to work almost exclusively on IE and only a recent version at that?

Microsoft want to FORCE you to adapt to them.

Jerry

I doubt if I'll lose sleep over not being able to get the the extes web site...

BTW, right now I'm in my LINUX class, surfing on a LINUX box.

Bob Kaplow NAR # 18L TRA # "Impeach the TRA BoD" >>> To reply, remove the TRABoD!

Don't worry. You aren't missing anything. It still has all the faults of the earlier version except now you can see those faults with Nutscrape.

Yes, there is life after Microsoft. (A non-crashy, virus resistant one, too.)

Tim

Yup. It's call "DOS" :-) Linux ain't no bed of roses, especially if you want well-documented development software.

"Docs? We d>

OSX

Transport and now they

Maybe a simultaneous re-release of all the NASA rockets they ever produced, along with B14's!

Randy

There is a quick, cheap and easy substitute for the B14 - just cluster two 13mm A10's.

O.k., that's a B20, not a B14. Even better. Or, cluster four, for a C40!

Drawbacks: - only available in -0, -3 and -P. - won't fit in an 18mm rocket.

Still fun.

Not available in -0.

They stopped making them years ago and they lost NAR certification after

-Fred Shecter NAR 20117

And one other:

- it's not an A10, it only says that on the case.

I have a couple of packs tucked away. I haven't seen them locally for the past few months, I guess they sold their stock out.

I'll just have to burn them solo.

Is any Estes motor a "full" anything?

It just has to have a total impulse of more than 1.25, and not greater than 2.5 NS to qualify as an "A".

Or are you talking about the average thrust rating?

Yeah, that has to be it.

If you open it in Rocksim's engine editor, depending on whose data you use, it's somewhere between 1.8 and

Even if you lop off the tail and only look at the spike, it's only an average of 5 or 6 Ns.

The reason the spike looks so high is because the tail is so low.

But I got a ton of them (A10-0T's) and I plan to fly them, just not at club launches anymore. Estes needs to sell a rocket that uses them so they can recert them :)

Doug

Yup. It has a huge core burning BP spike, but the burn duration is about 0.8 seconds and total impulse is 2 Ns thus it is more like an A2. NAR rates the average thrust as 2.35N.

However, regardless, it still has a healthy spike in the first 0.2 seconds so one would still use it where a good kick off the pad is needed or wanted. It has twice the peak thrust of the "A3" and it is still a fun mini motor. It just isn't an A10.

Mike D.

Aaaiiiieee!!!! Newtons! Not Newton-seconds.

Should be "average of 5 or 6 N."

Doug Face hurting...

Doug/Mike - interesting! I never noticed, but yeah, the A10 has an impressive spike, but a long, weak tail. I guess giving at an "A2" designation would have made it seem a lot whimpier than the A3... similar to the C6 vs. the C5, whose average thrust is lower but has better lofting ability than the C6, due to the higher initial thrust.

This is a good example of why the 'average thrust' component should have instead been the peak thrust, where motor designations were concerned. In my opinion, of course.

This might be the first time in history this has been discussed in this detail regarding the Estes product.

Jerry

Speaking of A10's, I remember having trouble getting 'em to stage to a 1/2A3-4T upper stage motor... 1/2A booster motors worked fine but the A10 wouldn't light the top one. (To make sure the top one wasn't a dud, I stuck it nozzle up in a hole in the ground and static fired it... it worked just fine.

At the time I attributed it to the larger nozzle in the A10 - I figured that maybe the pressure dropped off more quickly at burnout and the "hot stuff" didn't hang around inside the motor as long, reducing the amount of ignition supplied to the upper stage.

-dave w