rockets
Well-Known Member
What is the biggest motor ever made by a company like Loki, CTI, Aerotech, Ellis or any other HPR company?????? Answer appreciated... Thanks, Rockets.....
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CTI makes "S" motors.
Got an extra 60,000?
CTI makes "S" motors.
Got an extra 60,000?
CTI makes "S" motors.
Got an extra 60,000?
Most really big motors are built for "go" not "show".
Sparkies have anywhere from 12-20% less umph than any other propellent for the same size case. So for any purpose other than "show" it's not used.
The largest skid we [Team Wildman]have flown is the CTI O-3700 at a cost of over 3,000.00
The S motor was built for lofting payloads to over 400,000ft . Somewhere I have a pic of one,if I can find it.
I don't know what the propellent is, definitely not a color.
Here's the "Mega DarkStar" on the O-3700..........
Is that yours??? WOW!! Any video??
Is that yours??? WOW!! Any video??
I find it a bit unfair to count CTI's S motor, primarily because that was almost certainly built by Cesaroni's aerospace and defense division for A&D purposes, and not by the HPR division (or for HPR purposes). It's kinda like some odd scenario where ATK decides to get into the HPR market, and then claim that the SRB is the biggest motor ever made. :2:
No Wildman owns it.
I did work non stop for 10 days with him to build it, start to finish! We flew it 3 times so far.....1-O & 2-P's
Here's a shot of S motor....you will have to pay a large sum of money to see what's inside...LOL
View attachment 263446
Here's a pic of O motor hanging out the back.....
View attachment 263447 View attachment 263448
Here's the build thread I did.....
https://www.rocketryforum.com/showt...uot-MEGA-quot-DarkStar-at-LDRS-quot-O-quot-my!
One correction to the title of this thread.
The National Aeronautics and Space Administration (NASA) is the United States government agency responsible for the civilian space program as well as aeronautics and aerospace research. NASA is a technology development and purchasing agency. NASA does not make rocket motors, or rockets or even most satellites, they purchase them from civilian contractors. NASA decides what is needed to perform a mission, develops a set of specifications, and puts the job out for bids. Commercial civilian aerospace companies respond by writing a proposal and submits a quotation that includes the cost of the job, and NASA awards a contract for a job on both the price and the ability of the company to deliver the product on time and within budget.
The largest solid rocket motors built were made by ATK and Hercules. The most powerful liquid motors are the current Glushko Lox/Kerosene RD-170/RD-171 family of motors and the slightly less powerful Rocketdyne Lox/Kerosene F-1 used in the Saturn-V.
FAA Class 2 rockets weight more than 1.5 kg and can have a total impulse up to a full O (40.96 kNs) and require a simple FAA waiver. FAA Class 3 rockets have installed total impulse greater than a Class 2 rocket and up to 890 kNs and require a full blown trajectory and safety analysis. Most if not all APCP motor manufacturers have made class 3 motors, principally P impulse, and CTI manufactures S motors and larger if requested. Amateur groups such as GoFast 2004 have an S impulse motor made and used a CTI S motor for their 10 Anniversary flight in 2014.
Commercial APCP costs about $120+ per kg. and when propellant grains exceed 1.4 kg, shipment requires an exclusive explosives truck @$3+ per mile, so Class 3 motors are expensive to make and ship. Considering that there is about 370 kg of propellant in a 100% T motor, you are looking at a $100K+ motor that burns between $10K-$20K per second! So the market is quite limited. :wink:
Bob
Post #3 $60K, but that's only a small part of the cost of using it. It's not a one person project, and by the time your team gets all the required permits (Black Rock is the just about only place amateurs can be granted a permit with TRA assistance) after you pass the Class 3 paperwork requirements, build the rocket and the payload, and assemble and transport your team and equipment to the launch site, and complete the launch and return home after several years of work, you've likely spent upwards of $500K......for a ~2 minute excursion into space (100+ km) on a suborbital trajectory.Very cool info, thanks! I wonder, how does the cost of buying one of those CTI S motors (and building the rocket) compare to say purchasing a commercial sounding rocket to fly a payload to space?
CTI makes "S" motors.
Got an extra 60,000?
Datasheet of the UPA-264-C "S" motor. Larger ones are on the drawing board.
View attachment 263658
Jeroen
Here's a shot of S motor....you will have to pay a large sum of money to see what's inside...LOL
If my math is correct that would be a 437616 S-39093.
How much bigger are the next ones?
HP motors are by definition FAA Class 2 motors and fall under NFPA 1125 and 1127. An S motor is a FAA Class 3 motor, not a high power motor, and does not fall under any NFPA classification so they are not certifiable as high power motors and different rules apply. Accordingly Class 3 motors are considered research motors by TRA whether they are commercially made or not and TRA research rules apply as does the discretion of the TRA BOD and the FAA on their use if the use is at a TRA sanctioned launch.I find it a bit unfair to count CTI's S motor, primarily because that was almost certainly built by Cesaroni's aerospace and defense division for A&D purposes, and not by the HPR division (or for HPR purposes). It's kinda like some odd scenario where ATK decides to get into the HPR market, and then claim that the SRB is the biggest motor ever made. :2:
If my math is correct that would be a 437616 S-39093.
How much bigger are the next ones?
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