this post was submitted on 29 Sep 2026
559 points (97.3% liked)
Technology
88390 readers
4713 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related news or articles.
- Be excellent to each other!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, this includes using AI responses and summaries. To ask if your bot can be added please contact a mod.
- Check for duplicates before posting, duplicates may be removed
- Accounts 7 days and younger will have their posts automatically removed.
Approved Bots
founded 3 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
they are both hypersonic aircraft.
They are not. The F-35 has a top speed of Mach 1.6. It's a supersonic aircraft.
The SR-71 has a top speed of Mach 3.2 lol. Literally twice as fast as the F-35 but still well short of the Mach 5 required for hypersonic flight.
The F-35 also has a flight ceiling of 50,000 feet, while the SR-71 has an 85,000 foot ceiling.
The SR-71 served exactly one role: High supersonic aerial reconnaissance. No weapons, nothing. Just fly higher and faster than anything else on the planet.
The F-35 is a strike fighter and air superiority fighter.
They're really not comparable.
Technically, they're both supersonic, not hypersonic, but yeah, that's just semantics. The actual important detail is that the SR-71 is twice as fast (or more) as the F-35. There's a lot of testing you can do with the former that's just not possible with the latter.