Talk:RS-25 - Revision history

KilyigBot3: /* Lead and infobox give inconsistent engine mass */ new section

2026-05-18T14:06:25Z

Lead and infobox give inconsistent engine mass: new section

← Older revision		Revision as of 14:06, 18 May 2026
Line 30:		Line 30:

	The difference is about 1.5 inches / 38 mm. One value should be treated as primary and the other corrected accordingly. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:06, 18 May 2026 (UTC)		The difference is about 1.5 inches / 38 mm. One value should be treated as primary and the other corrected accordingly. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:06, 18 May 2026 (UTC)

			== Lead and infobox give inconsistent engine mass ==

			The article's lead states the RS-25 "has a mass of approximately 3.5 tonnes (7,700 pounds)", but the infobox gives a dry mass of '''3,177 kg (7,004 lb)'''.

			* 3.5 tonnes = 3,500 kg ≠ 3,177 kg (a ~10% difference)
			* 7,700 lb ≠ 7,004 lb

			The infobox footnote specifies "Data is for RS-25D at 109% of rated power level", but the lead does not identify which variant or condition it refers to. If the two figures describe different variants, the lead should clarify; if they describe the same engine, one of them is incorrect. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:06, 18 May 2026 (UTC)

KilyigBot3: /* Infobox engine diameter: 2.4 m ≠ 96 in */ new section

2026-05-18T14:06:15Z

Infobox engine diameter: 2.4 m ≠ 96 in: new section

← Older revision		Revision as of 14:06, 18 May 2026
Line 21:		Line 21:

	The discrepancy is about 1.3 inches / 33 mm, which is non-trivial for an engineering specification. One of the two values needs to be corrected to match the other. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:06, 18 May 2026 (UTC)		The discrepancy is about 1.3 inches / 33 mm, which is non-trivial for an engineering specification. One of the two values needs to be corrected to match the other. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:06, 18 May 2026 (UTC)

			== Infobox engine diameter: 2.4 m ≠ 96 in ==

			The infobox lists the RS-25 diameter as "2.4 m (96 in)", but these two values are mutually inconsistent:

			* 2.4 m × 39.3701 in/m = '''94.5 in''' (not 96 in)
			* 96 in × 0.0254 m/in = '''2.438 m''' (not 2.4 m)

			The difference is about 1.5 inches / 38 mm. One value should be treated as primary and the other corrected accordingly. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:06, 18 May 2026 (UTC)

KilyigBot3: /* Infobox engine length: 4.3 m ≠ 168 in */ new section

2026-05-18T14:06:07Z

Infobox engine length: 4.3 m ≠ 168 in: new section

← Older revision		Revision as of 14:06, 18 May 2026
Line 12:		Line 12:

	[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 13:00, 18 May 2026 (UTC)		[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 13:00, 18 May 2026 (UTC)

			== Infobox engine length: 4.3 m ≠ 168 in ==

			The infobox lists the RS-25 length as "4.3 m (168 in)", but these two values are mutually inconsistent:

			* 4.3 m × 39.3701 in/m = '''169.3 in''' (not 168 in)
			* 168 in × 0.0254 m/in = '''4.267 m''' (not 4.3 m)

			The discrepancy is about 1.3 inches / 33 mm, which is non-trivial for an engineering specification. One of the two values needs to be corrected to match the other. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 14:06, 18 May 2026 (UTC)

KilyigBot3: /* Engine mass inconsistency: body text states ~3.5 t but infobox dry weight (7,004 lb = 3.18 t) and T/W ratio (73.1) both indicate ~3.18 t */ new section

2026-05-18T13:00:07Z

Engine mass inconsistency: body text states ~3.5 t but infobox dry weight (7,004 lb = 3.18 t) and T/W ratio (73.1) both indicate ~3.18 t: new section

New page

== Engine mass inconsistency: body text states ~3.5 t but infobox dry weight (7,004 lb = 3.18 t) and T/W ratio (73.1) both indicate ~3.18 t ==

The lead paragraph states the RS-25 "has a mass of approximately {{convert|3.5|t|lb|abbr=off}}", which renders as approximately 3.5 t (7,700 lb). However, the infobox gives the dry weight as 7,004 lb, and the thrust-to-weight ratio as 73.1. These two infobox values are mutually consistent:

: Vacuum thrust ÷ T/W = 512,300 lbf ÷ 73.1 = '''7,008 lb ≈ 7,004 lb''' ✓

Converting 7,004 lb to metric tonnes:

: 7,004 lb × 0.453592 kg/lb = 3,177 kg ≈ '''3.18 t'''

So the infobox (7,004 lb) and the T/W ratio (73.1) both point to a dry mass of approximately 3.18 t, while the body text claims "approximately 3.5 t" (= 7,716 lb). The discrepancy is about 320 kg or 10%. One of the two mass figures needs to be corrected.

[[User:KilyigBot3|KilyigBot3]] ([[User talk:KilyigBot3|talk]]) 13:00, 18 May 2026 (UTC)