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CTI , can we get a Smoky Sam load in the 75mm 2 grain range please
The issue was the diversion section of the nozzle degrading to the point of it being gone by the end of the burn. Size of the rocket wasn't a factor.Were the motors in a larger diameter rocket? I've had the White fireball in the back of the rocket pretty thoroughly cook everything in the back of the rocket. One example was a K250 in my Magnum. 5.5" diameter with 6 outboard 29 mm mounts. Rocket came back with all 6 empty outboard tubes burned away and everything in back well scorched, including the SU motor's nozzle.
It will if there is a large fireball under the rocket. The only time I had nozzle damage was the long burn White lightning motor in a large rocket. The same motor in a smaller (3") rocket had no problems.The issue was the diversion section of the nozzle degrading to the point of it being gone by the end of the burn. Size of the rocket wasn't a factor.
We can't make any recomendations until we know what the issues are. For the time being perhaps wait till we find a solution.So just keep flying both items as they are?
Tony
Perhaps the slight extra time on the pad to lift the rocket due to the weight may heat the nozzle a little extra, and the slower excelleration, but I'd be surprised if it makes much of a difference.It will if there is a large fireball under the rocket. The only time I had nozzle damage was the long burn White lightning motor in a large rocket. The same motor in a smaller (3") rocket had no problems.
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Those nozzles were both flown in an M840. one is mine (Jonathan DuBose) and the other belongs to an Oregon rocketeer who actually flew it in the same hardware. Mine in Sept 2019, the other in June 2020 both at Black Rock. My motor definitely under-performed. I inquired with CTI but never got a response. Still very interested in the answer to this issue. Thanks "tfish" for bringing this up again (hope you are doing well, c u soon, J)Were the motors in a larger diameter rocket? I've had the White fireball in the back of the rocket pretty thoroughly cook everything in the back of the rocket. One example was a K250 in my Magnum. 5.5" diameter with 6 outboard 29 mm mounts. Rocket came back with all 6 empty outboard tubes burned away and everything in back well scorched, including the SU motor's nozzle.
If Cesaroni suspects an issue they should immediately notify the certification authorities (CAR MCC, NAR S&T, and Tripoli TMT) and notify their dealers, even if no solution has been found yet.We can't make any recomendations until we know what the issues are. For the time being perhaps wait till we find a solution.
I still remember Mike Dennet from CTI saying that they would never make motors smaller than 38 mm because it just wasn’t profitable, so who knows?I know it will never happen, but some 18mm motors would be a great addition to the line. It would a way to lure some new users like a free sample of heroine does to drug users.
Based on the Aerotech 18mm sales, I wouldn't see this as a good move unless they are single use and priced to compete with estes motors.I know it will never happen, but some 18mm motors would be a great addition to the line. It would a way to lure some new users like a free sample of heroine does to drug users.
Based on the Aerotech 18mm sales, I wouldn't see this as a good move unless they are single use and priced to compete with estes motors.
And they'd need to offer something that the current choices (including Black Max and White Lightning Q-Jets) don't. I'm not sure what would want, save for a long-burn motor that doesn't burn out its case like the Chinese-made BP Quest C6s sometimes did, that isn't covered by current Estes and Aerotech offerings in 18mm motors. Well that and maybe something closer to a full D than the Q-Jet Ds are (like the OOP D10s and D21s).With 18mm motors, it is about hooking the user for the future. I understand it will not make you rich. They would likely need to be single use.
And they'd need to offer something that the current choices (including Black Max and White Lightning Q-Jets) don't. I'm not sure what would want, save for a long-burn motor that doesn't burn out its case like the Chinese-made BP Quest C6s sometimes did, that isn't covered by current Estes and Aerotech offerings in 18mm motors. Well that and maybe something closer to a full D than the Q-Jet Ds are (like the OOP D10s and D21s).
Based on the Aerotech 18mm sales, I wouldn't see this as a good move unless they are single use and priced to compete with estes motors.
Ooooh, an 18mm Blue Streak....I could get into that. I figure the Q-Jet Black Max motors have the Smoky Sam aspect covered (another favorite CTI load for me).Red and blue Ds would be nice. But I may be weird for liking pretty colors.
Agreed...certainly they would need to be comparable to Q-Jets of similar impulse classes.Based on the Aerotech 18mm sales, I wouldn't see this as a good move unless they are single use and priced to compete with estes motors.
Heard from CTI, they said any day now.Any timeframe for a 98mm Gen2 boattail to be available? Thanks
-Tony
AT / CTI cross load question.
I understand that, per Tripoli, 75mm AT loads can be used in CTI hardware. Very good news!
Question, can 75mm CTI loads be used in matching AT hardware?
My guess would be yes, but I am not one to guess with 75mm motors.
thanks
I believe so, check here.AT / CTI cross load question.
I understand that, per Tripoli, 75mm AT loads can be used in CTI hardware. Very good news!
Question, can 75mm CTI loads be used in matching AT hardware?
My guess would be yes, but I am not one to guess with 75mm motors.
thanks
I believe so, check here.
http://www.aerotech-rocketry.com/up...571-8d9c-636fbc4b6cbc_AT Crossload Matrix.pdf
It's been some time since CTI has had anything new to offer, that will hopefully change in the near future.
For now I am very pleased to announce the certification of a new P98 Boat tail (Gen 2) from Cesaroni Technology, Inc.
While the boat tail was certified in Canada, a reciprocal agreement between the Canadian Association of Rocketry, the Tripoli Rocketry Association and the National Association of Rocketry means they may be flown in many jurisdictions.
It should be thicker than the retaining ring. Does the ring come with an engraving "Adapter Ring"?Do you have the dimensions of the adapter ring and the boat tail? I bought the PR98-AR and the PR98-BT for the Gen 2. The adapter ring looks to be the same size as a retaining ring, one half inch thick. When I tighten both the forward retaining ring until It's flush with the casing and the aft adapter ring so it sandwiches the motor between them, there are no threads left to screw on the boat tail. It almost seems like the adapter ring should be more than 1/2 inch thick. I am talking about the 5800 here with the 6xl case. When both 1/2 inch retaining rings are flush with the end of the casing, the motor is nice and tight between the rings.
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