Rocketry Planet
| New White Thunder Pro38, Vmax Pro54 reloads certified |
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| 2008 Archived News by Cesaroni Technology Incorporated | |
| Monday, April 28, 2008 | |
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The CAR Motor Certification Committee has tested and certified four new Pro38 reloads using our White Thunder propellant. Pro38 White Thunder is now available in 1G through 5G (the 5G I540 was already available). The White Thunder Pro38’s have the highest total impulse of all of our Pro38 motors and delivers exceptional Isp. The burn time is between the Vmax™ and the Smoky Sam™ propellants. The flame of our White Thunder propellant looks like “the real thing” and it most closely resembles our military and aerospace propellants. Performance data is listed at http://www.pro38.com/products/pro38/motor.php. The CAR Motor Certification Committee also tested and certified three new Pro54 reloads using the popular Vmax propellant. This is the fourth propellant available for Pro54®: Classic, Smoky Sam and White Thunder reloads were already available for our Pro54 line of motors. A fifth propellant will be introduced soon for all Pro54® casing sizes. The Vmax Pro54’s are characterized by very high average thrust levels; perfect for a project that turned out a little too heavy or test-flights on smaller fields. A few demos were already flown at the Florida Winternationals, held February 16-18, 2008. These motors turned out to be real crowd pleasers. Performance data is listed at http://www.pro38.com/products/pro54/motor.php. Pro38®, White Thunder™, Vmax™, Classic™ and Smoky Sam™ are a registered trademark and trademarks of Cesaroni Technology Incorporated in Canada. |
GORMLEY, Ontario CAN — Cesaroni Technology Incorporated is pleased to announce the certification of White Thunder™ propellant in the Pro38® product line as well as three brand new Vmax™ propellant reloads for the Pro54® product line. 
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What design differences allow for the classic propellant to be the highest total impulse in the 5G case but not in any other in the 38mm line?
The 5G I540 was certified a couple years ago...might be why it doesn't have the same total impulse relationship as the others.
Just to be clear - are you saying that the White Thunder of today might be more powerful than it was? If so the 5G WT load previously certified as an I540 might be pushing into J territory. As long as the delta is under (20?) a certain percentage the vendor doesn't have to recertify it but this puts the L1 / L2 status into question of this motor.
Interesting. I suspect it isn't that simple. I suspect it is based on some geometry issue - like the J285 is able to operate at a higher total efficiency and squeezes out a little more juice than the I540 at the same max operating pressure in that one case. But I don't have a definitive answer...
What design differences allow for the classic propellant to be the highest total impulse in the 5G case but not in any other in the 38mm line?
Conspiracy?
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
Aliens? The strange lights in formation above the plant were just road flares tied to helium balloons. The ProX crop circles can probably be explained as well.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
Interesting. I suspect it isn't that simple. I suspect it is based on some geometry issue - like the J285 is able to operate at a higher total efficiency and squeezes out a little more juice than the I540 at the same max operating pressure in that one case. But I don't have a definitive answer...
As previously mentioned, the 5G version was originally certified a few years ago. Vmax was a trade name given to one of our propellants for HPR use around the time for lofting bowling balls or something along those lines. We really didn’t retool much on the reload design given the limited numbers involved. In any event, the product was well received by consumers for sport rocketry use in its limited offering at the time.
There are a few reasons for the delta with the new versions. Because of the slower burn rate of the Classic propellant, the nozzle throat diameter is much smaller than for the White Thunder Propellants and the expansion ratio is limited by the molded nozzle for that particular reload/case module. For the larger White Thunder motors the expansion ratio becomes significantly smaller than for the Classic motors, simply because we ran out of room without resorting to a different aft closure and nozzle configuration. Also, the Classic propellant uses a graphite throat insert that keeps the average Pc up during the burn. The larger White Thunder motors have more severe erosion, and hence burn at lower average Pc. The classic load also has a tad more propellant load IIRC. Despite the moderately fast burn rate, 38 and 54mm Vmax motors retain fully adjustable delays and ejection charges and do not contain ferrocene or catocene additives.
We may tune up the 5G a bit in future certification sessions as time permits. It wasn’t a priority in the last go around as it was already in the books as configured.
Clear as mud?
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
Argh! I was hoping you'd pop in - but I was expecting a real substantive answer. Now all I can assume is that it involves some conservation of mass from another dimension. In other words... Alien technology stolen from area 51.
Area 51 actually stole some of their technology from CTI Gormley. Well at least the road flares and helium balloons.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
http://www.cesaronitech.com/
(941) 360-3100 x101 Sarasota
(905) 887-2370 x222 Toronto
I heard that they did that because they like how their voices sounded on helium and they had a party they needed mood lighting for...
Now back to the real topic... Anthony is there a simple reason for the differences I noticed or is this something that you prefer to remain silent on? I'm all for education but if this crosses into an area you prefer not to disclose we are all mature enough to understand that.
EDIT - I can't read in sequence apparently. Anthony did answer this. See earlier posts.