NateLowrie
Well-Known Member
- Joined
- Jun 28, 2016
- Messages
- 667
- Reaction score
- 4
I have a few KBA K-750 reloads. They take a 54-2550 case, but from what I can tell it's not an Aerotech case. What case(s) are these loads built for?
Know of anywhere to buy the hardware? None of the AT dealers seem to have it and my initial google searches are coming up blank.Kosdon
Kosdon by Aerotech (KBA).
I see that they have 1 in stock. Thanks for the suggestion.That motor will fit in the AMW 54/2550 case. You'll have to get the whole motor assembly, with nozzle, bulkheads, etc. I think the only source for those is AMW/prox.com. I have a K-750, and also the K-1750 to fly, looking forward to both!
Phil L.
Is it just the casing or does it include the nozzle, closure, and snap rings?Have a new gold colored 54/2550 Kosdon motor casing that I can spare.
$90 plus actual shipping.
John
How do you figure a Loki 54/2000 case will work with a KBA K750 reload?[QUOTE Loki 54/2000 will work, but case only.
AMW nozzlesI ended up just getting the AMW 54-2550 from Gloria. The only thing I need to do is verify the nozzle bore is 0.660in. The AMW website didn't have any information on the bore size. I got 5 of these K-750 loads super cheap and figure I can use the hardware for EX as well.
If you use a KBA load in anything but a Kosdon or AMW case, or with mods like you describe, it becomes a TRA Research motor.Ken has the nozzles and forwards. You can use a Loki fwd, and Ken show you a trick to use the Kosdon tracking smoke or Aerotech delays and a stack of o-rings. I keep them around so I can use any forward with any brand rrload.
John,If you use a KBA load in anything but a Kosdon or AMW case, or with mods like you describe, it becomes a TRA Research motor.
I recommend greasing the liner well. They are thin/brittle liners (since AT doesn't have to warranty the case). I still have a K1750 left but I'm reluctant to use it. The other loads burned through the liner and scorched by AMW cases pretty bad. I've flown each of them at one time. The red M was in somebody else's case.John,
I would be using the AMW casing, nozzle, and forward closure which should be certified as it's mentioned in the instructions. Thanks for the clarification though. It doesn't really matter much for me anyway as to whether I fly it as EX or certified.
Since guessing he was already certified, just assumed everyone knew that. Not unless he is only flying at a NAR launch.If you use a KBA load in anything but a Kosdon or AMW case, or with mods like you describe, it becomes a TRA Research motor.
I posted that note in case it was read by 1000's of other readers of RTF. ;-)Since guessing he was already certified, just assumed everyone knew that. Not unless he is only flying at a NAR launch.
The reload info sheet usually states the bore size of the nozzle, just in case it's not the same as AMW.AMW nozzles
54/1050 0.4375
54/1400 0.484
54/1750 0.563
54/2550 0.656
54/1050 0.4375
54/1400 0.484
54/1750 0.563
54/2550 0.656
75/1700 & 75/2500 = 0.453"
75/3500 = 0.609"
75/6000 = 0.793"
75/7600 = 0.928"
I recommend greasing the liner well. They are thin/brittle liners (since AT doesn't have to warranty the case). I still have a K1750 left but I'm reluctant to use it. The other loads burned through the liner and scorched by AMW cases pretty bad. I've flown each of them at one time. The red M was in somebody else's case.![]()
Greasing a commercial motor's liner doesn't make it a research motor. Modifying the liner, if not recommended by the manufacturer, would be a non-certified assembly.This is would make it a research motor I think, but you could try to soak the liner in Firefox's fire retardant liquid. Then, wrap the liner in pyro tape. Then grease. That should given sufficient protection against burn through.
The nozzle throat for the KBA loads has to be the same as the nozzle for the Kosdon/AMW case it was certified with. There are no substitute nozzles available. The instructions from AT for the "Animal Compatible" loads list the nominal throat diameter. It should match the ones I've listed.The reload info sheet usually states the bore size of the nozzle, just in case it's not the same as AMW.
To add to what John said, it's a problem not just for the throat diameter in most cases (it is a .656 for the 54/2800), but the size/shape, liner step dimensions are all going to be different between Loki Research and others. Sure it can be "make" to work, but don't assume that it will work just because the throat is the right size, because it won't work without modification to something somewhere.Throwing in a Loki nozzle would be a problem.
I should have explained further. Thanks!To add to what John said, it's a problem not just for the throat diameter in most cases (it is a .656 for the 54/2800), but the size/shape, liner step dimensions are all going to be different between Loki Research and others. Sure it can be "make" to work, but don't assume that it will work just because the throat is the right size, because it won't work without modification to something somewhere.
The OD of the casting tube will not fit in any of the standard liners. Gary squeaked more propellant in at the risk of ruining the (other manufacturer's) casing.John, I can send you a sample of my convolute liners if you'd like to try the fit around your KBA grains. Send me an email if you'd like to try.