Talk:AJ10

Units and values for Isp

The specific impulses given here are far too low to be correct. In units of newton-seconds of impulse per kilogram of propellants, the vacuum Isp should be roughly 3,000, like other pressure-fed bipropellant rockets designed for vacuum use. Karn (talk) 09:06, 29 March 2012 (UTC)

Who uses those units ? "seconds" is traditionally lbf-seconds/lb of prop, or just use exhaust speed in m/s (which matches your n.s/kg). - Rod57 (talk) 18:24, 28 April 2021 (UTC)

Table for variants

Could have table of variants - with columns for Isp, propellant, and vehicles used in. - Rod57 (talk) 18:19, 28 April 2021 (UTC)

What alloys used

• What alloys and structure used in the combustion chamber ?
• What alloy for the nozzle bell ? Some articles (and sources) just say "a niobium alloy". - Rod57 (talk) 19:13, 30 November 2023 (UTC)

this article is a stub

it appears there is not allot of information on it.(example: history of the AJ10) 208.38.237.153 (talk) 14:11, 25 November 2024 (UTC)

Article is sadly deficient

The first AJ10 flown was the AJ10-25 which first flew on the USAF RTV-A-1a on October 17, 1951. There are much more thorough sources than this cited by prior authors. Mark Lincoln (talk) 21:22, 14 February 2025 (UTC)

Some variants probably don't exist

I've done some research on the AJ10 variants in the listed table. I don't think the AJ10-118G, H or J exist at all since I haven't been able to find evidence that they exist aside from astronautix. The AJ10-118J is listed as being used on the N-II, but that was probably confused for the AJ10-118FJ, which was a Japanese version of the AJ10-118F. I also haven't seen evidence supporting the existence of the AJ10-196 and 198 aside from astronautix. I also think that the Transtar was a related project and not necessary part of the AJ10 lineage. Anyone else notice this? Lemniscate Biscuit (talk) 12:52, 9 August 2025 (UTC)

You could be right and it does require some more research. Astronautix is a start but it should be backed up with more sources. For existing rockets is should be easy to track down better references (I just added two book references). I'll see what I can do. 4throck (talk) 15:00, 9 August 2025 (UTC)

Alright. From what I have read on papers on Delta on NTRS, I've seen the AJ10-118, 118A, 118D, 118E, 118F and 118K. I searched for the spurious ones and didn't find any results (on NTRS and on Google/Scholar). Also, for some reason, I can't find a lot of info on the early Deltas and Aerobees on NTRS. Lemniscate Biscuit (talk) 18:28, 9 August 2025 (UTC)

I added references to the table for the variants I was able to find. The main source is McDowell, Jonathan C. (Aug 13, 2025). "Engines". GCAT: General Catalog of Artificial Space Objects. I've taken the liberty of correcting AJ10-118J to AJ10-118FJ based on it. McDowell is usually considered authoritative. 4throck (talk) 22:12, 13 August 2025 (UTC)

I'll try to find more instances of the other AJ10's for additional backing. Lemniscate Biscuit (talk) 22:32, 13 August 2025 (UTC)

I've done more searching. Apparently, the AJ10-138A as designed as part of the Improved Transtage Injector Program. The only issue is that all of the documents related to this program are firewalled for $45 by AIAA.

https://arc.aiaa.org/doi/abs/10.2514/6.1982-1195 Lemniscate Biscuit (talk) 22:52, 13 August 2025 (UTC)

I'm removing the AJ10-6 entry because it seems its actually an AJ11-6 which is related but not the same. Lemniscate Biscuit (talk) 22:34, 13 August 2025 (UTC)