Rocketry Planet

GORMLEY, Ontario USA — Canadian Association of Rocketry Motor Certification chair Tom Raithby announced yesterday the certification of ten new motors from Cesaroni Technology, Inc.  The testing sessions were conducted on February 4th and 23rd, 2010, at the Gormley CTI facility under the supervision of CAR president, Angelo Castellano.

During this testing session, the Pro29® product line received certification of the first Vmax™ reloads in 1G, 2G and 3G hardware. Two of the motors, the 56-F120-VM-14A and 110-G250-VM-14A, even though they are F and G impulse, are both considered high power under NFPA 1125 due to their high thrust. All of these new Pro29 Vmax motors have burn times under 1/2 second.

CTI's new threaded, plugged forward closure, top, is part of the new Classic Longburn reload kits. The new Pro54 1G Skidmark joins the others in the CTI Skidmark family.

In addition to the new motors, new hardware configurations were tested and approved, including the use of three motor spacers in the Pro29 line, allowing owners of 4G, 5G and 6G Pro29 motor hardware to fly 1G, 2G and 3G motor reload kits.

Other approvals saw the certification of a Pro54® 6GXL 2546-K300-CL-P, a 98.9% K Classic Longburn™ motor that has a plugged and threaded forward closure, allowing the attachment of recovery harnesses or forward motor retention devices.  The new K300 Classic Longburn was joined by a K160 and a K260 Classic Longburn in the Pro54 4G and 5G hardware, all three with over 8 second burn times.

The Green³ product line expanded with the certification of a Pro54 4G K400 and a Pro98® 6G N1975, while a new Skidmark™ was certified for the Pro54 1G hardware. Last and certainly not least was the certification of an N10000 Vmax motor for the Pro98 6G hardware, packing over a ton of thrust.

In recap, the new certified motors include:

• CTI 56-F120-VM-14A (CTI Pro29-1G)       
• CTI 110-G250-VM-14A (CTI Pro29-2G)    
• CTI 168-H410-VM-14A (CTI Pro29-3G)    
• CTI 396-I140-SK-14A (CTI Pro54-1G)        
• CTI 1597-K400-GR-14A (CTI Pro54-4G)   
• CTI 1526-K160-CL-6 (CTI Pro54-4G)          
• CTI 2285-K260-CL-P (CTI Pro54-6G)          
• CTI 2546-K300-CL-P (CTI Pro54-6GXL)     
• CTI 14272-N1975-GR-P (CTI Pro98-6G)   
• CTI 10347-N10000-VM-P (CTI Pro98-6G)

In other news, to show support for the new high power rocket motor labeling code recommended at the NFPA meeting in Salt Lake City, Utah, this past month, CTI will begin adding the "HP" prefix designation on the labels of all of their new motors in advance of the pending NFPA 1125 revisions.  This should be welcomed as a beneficial act for motor dealers, consumers and Range Safety Officers alike.

Pro29®, Pro54® and Pro98® are registered trademarks of Cesaroni Technology Incorporated in Canada.
Vmax™, Classic Longburn™ and Green³™ are trademarks of Cesaroni Technology Incorporated in Canada.
Skidmark™ is trademark of AMW/Pro-X in the United States.

Reader comments:

#1 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

The Classic Longburn motors sound awesome.

Interesting that the threaded forward closure is part of the reload. I assume it, like other Pro54 forward closures, is plastic. What sort of pull force can this withstand? I'm sure it's high or CTI wouldn't have gone with this design.

mcaplinger on 03-03-2010 05:00 PM

#2 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

Those Vmax motors should make for some awesome 29mm boosters for 2-stage, high-altitude projects. The only problem is that some of the impulses are all a few Ns too high to use with other CTI motors to make full-impulse, 2-stage rockets. Example: The 56 Ns F can't combine with any of the high-efficiency 2-grain 29mm motors to make a full G 2-stage; it would be a very small H total impulse motor instead. Same with the H motor, which is a little too high to combine with the 3-grain 29mm motors to make a full H.

But the 110 Ns G should go well with the 4-grain 29mm motors to make a full-H combination. Now that would be a fun flight. I'm looking forward to simming that. I bet it's at least 15k.

Adrian A on 03-03-2010 05:21 PM

#3 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

N10k? Jeepers...Anyone wanna set a speed record for N motors?

Minimum diameter 98mm rocket = how many g's with this motor? That would be interesting.

DAllen on 03-03-2010 05:52 PM

#4 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

Yeah sounds like an Incredible motor.

Check the CTI products thread there is a link to the video... its awesome.

As for the 54mm long burns.. I have a perfect cluster project for a couple of those and a couple od regular classics... planned for LDRS!

Thanks CTI you guys are AWESOME!

Stickershock23 on 03-03-2010 06:03 PM

#5 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

Quote:

The Classic Longburn motors sound awesome.

Interesting that the threaded forward closure is part of the reload. I assume it, like other Pro54 forward closures, is plastic. What sort of pull force can this withstand? I'm sure it's high or CTI wouldn't have gone with this design.

If you look closely at the photo, you can see there is what appears to be a steel threaded insert in the closure, which I would imagine either has a sizeable flange or is molded into the forward closure itself. In that case, it would need to rip that forward closure apart to fail. Considering this is primarily an altitude motor, I would think it will hold up against whatever G's a deployment from any rocket it would be capable of lifting can dish out. As you said, it's limits are likely quite high.

Mark

VARocketflyer on 03-03-2010 06:15 PM

#6 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

I'm looking forward to the 54mm 1G Skidmark motor. I love the soda can motors. All the rest sound cool too. CTI just keeps them coming!

LenB on 03-03-2010 07:09 PM

#7 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

Does CTI have a tapped forward closure which can be used for all 54mm reloads?

RocketJumper on 03-04-2010 12:06 PM

#8 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

Quote:

Does CTI have a tapped forward closure which can be used for all 54mm reloads?

No, unlike AT, the CTI 54mm forward closures are part of the reload and have the delay grain potted in. There has been some discussion of a metal spacer with an integrated tapped hole that would go in front of the reload, but this isn't a product yet.

mcaplinger on 03-04-2010 12:33 PM

#9 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

Quote:

Quote:

Does CTI have a tapped forward closure which can be used for all 54mm reloads?

No, unlike AT, the CTI 54mm forward closures are part of the reload and have the delay grain potted in. There has been some discussion of a metal spacer with an integrated tapped hole that would go in front of the reload, but this isn't a product yet.

Why wait for a product to come out? A little time invested searching McMaster-Carr or some similar places should be able to product a piece of extruded aluminum to fit into a Pro54 motor spacer like CTI demostrated for the 38mm line:

ddmobley on 03-04-2010 09:18 PM

#10 Re: Article: CTI gains 10 new certs, includes long burn motors, N10000

Quote:

Does CTI have a tapped forward closure which can be used for all 54mm reloads?

There are several options:

• We sent some blank closures to dealers. Users can tap these (or just loop the kevlar through) and back fill with epoxy.
  
• A spacer with tapped insert (see Darrell's reply earlier in this thread).
  
• Even easier: a large washer inside the spacer that acts as an anchor point.
  
• We are considering to make the tapped Pro54 closure that was introduced on the K300 as a standard 'option' for plugged motors. Maybe even have these closures available so they can be exchanged if motor eject is not required.
  

Jeroen

Jeroen_at_CTI on 03-04-2010 09:22 PM

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