That surprises me. When I looked at the curve I had the same thought as Matt - this looks like trouble in the big Estes kits, especially with that long build up to max thrust.

So thanks for the info and looking forward to seeing these!

I forgot to mention that I have also flown many two stage rockets with these motors and the only issue to date is recovering the upper stage!

John Boren

As George Takei is wont to say:

Oh My . . . .

This is . . . wow.

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NAR #27085 - Oregon Rocketry - SAM

Are they powerful enough for a reasonably built 1/100 Estes Saturn V with a 29mm mount ?
Or are we talking Cruise Missile ?
Will they be sold in the proper 3-pak fashion ?

How about some PORT-BURNERS with a REALISTIC peak thrust level instead ???????
Hmm ?

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !

That's great news. Given the 60g propellant mass, presumably under 62.5g TEW, this must allow them to be shipped in the same hazard class as you already ship E15 motors. This is definitely a total departure for Estes similar to but quite better than the FSI F7. HAPPY THANKSGIVING 2012! So are you also going to make a 39-40 N-s "full E" or is that too much product fragmentation?

That's 3.45 sec burn time. To me that short of a time reduces many of the concerns I had for even fatter streamlined models. No Saturn V's here (except maybe piston launched ), but I can see why John says the existing Pro line of kits will fly with those. Being BP the prices ought to be somewhat similar to the E15 on a per gram basis.

I will really be curious to see the new casing. Maybe I'll buy 10,000 of them and make some APCP motors with them. I did some successful experiments (customer deliveries) with 24mm APCP in spiral phenolic and NOZZLELESS motors (certified!) in traditional convolute wound cases.

These fit in a very wide range of U.S. Rockets kits. 4x as many kits as Estes offers. Masking tape thrust ring! Check out Sonic 160 (BMR2 series) and Two the Limit (AMR series). Everyone needs a Screamer! BMR2 series and available now from USR or Bellevue Hobbies email= sales@bellevuehobbycenter.com .

Jerry

NAR:

The following motor has been certified by NAR Standards & Testing for general use as a Model Rocket Motor effective November 25, 2012.
Estes:

F15-0,4,6,8
29mm x114mm
49.61 Newton-seconds Total Impulse
25.26 Newtons Peak Thrust
14.38 Newtons Average Thrust

Propellant mass: 60.0 grams

Top 10 rockets that can use the Estes F15 right now:

Aero-Roc (BMR) 2.25" x 35"
Banshee (BMR) 2.25" x 42"
Interroc (BMR) 2.25" x 44"
Weghtlofter (AMR) 2.25" x 35"
Two The Limit (AMR) 2.25" x 65"
Miniroc 1.2 (SS)(BMR3) 1.22" x 21"
Fire & Forget (SS) 1.22" x 27.5"
Star (SS) 2.25" x 40.5"
Mosquito 2.2 (SS) 2.25" x 17.5"
Micro-Interroc (18mmMM) 1.22" x 21"
Screamer (BMR2) 2.22" x 22"

Sonic Series - Sonic 160 (BMR2) 1.22" x 34"
El Lubbo (AMR)(BMR2) 4" x 46" (not in stock)
Tomahawk 1.2 (BMR3) 1.22" x 21"
Arcon 1.2 (BMR3) 1.22" x 21"
Sniper (BMR3) 1.22" x 25"
Pillar of Fire 29mm (CC) 4" x 89" (not in stock) 7x29mm

Not near full F. Only 50ns from 60gms of propellant. Only 4.5" long.

Should be ok up to about 1.5 maybe 1.75 lbs. lift off weight? Should be fine for all the current Pro Series II rockets. A little iffy on the big Red Max.

Contest certification is dependent on availability. So that won't happen until they actually reach the market.

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Roy
nar12605

Cluster?

__________________
Bill Spadafora
http://www.billsplumbing.com
billspad@comcast.net bill@billsplumbing.com

Bill, were these the motors you guys were testing?

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If it flies, I can crash it!

Wild-arse guess:

Down the road a bit we'll get the 29mm high-thrust "E".

That is, a port-burning E in the same casing as the F15.

Hopefully much more reliable than the old FSI E60!

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NAR #27085 - Oregon Rocketry - SAM