Author Topic: Okay what's up with 262 climb speed? (Read 898 times)

Krusty · « **on:** December 11, 2005, 01:15:50 AM »

Okay, so the 262 accelerates slowly. REAL slowly. Right? It takes a minute of level flight to get to 280mph before you can autoclimb.

But here's the thing... That's just the most efficient climb speed. Why can't you get MORE fps climb with a steeper angle? Hell even at simply 200mph you'd get much more ramp effect (whatever it's called) against the wings! With those powerful engines, despite the low acceleration once you're at a speed it keep sit well -- so why won't it produce more fps in a steeper climb?

Delirium · « **Reply #1 on:** December 11, 2005, 01:28:46 AM »

It climbs alot like my P38, you get a higher climb rate if you climb at a certain speed that is way above stall speed.

Not to mention, climbing at a certain speed can extend range as well.

Debonair · « **Reply #2 on:** December 11, 2005, 01:30:23 AM »

My guess: Vy is 280

Karnak · « **Reply #3 on:** December 11, 2005, 01:50:19 AM »

Because the engines aren't that powerful. That is why it's acceleration is poor. The advantage it has is that jet engines are much more efficient than props as the speed rises so it is still increasing it's acceleration as a prop fighter is losing it's. Props become less and less efficient as the speed rises and in a dive to high speed they actually produce net drag and act as an airbrake on the front of the fighter.

Angus · « **Reply #4 on:** December 11, 2005, 01:23:47 PM »

Faster aircraft usually have the most beneficial climb rate at higher speed.
And, like Karnak said, the power isn't that much. Only it keeps working well at higher speeds than prop fighters.

Golfer · « **Reply #5 on:** December 11, 2005, 01:39:11 PM »

300 works great and is what I use getting to an area quickly. Pull the power back even 1000rpm and watch your flight time on the e6b go throught the roof.

By todays standards...the 262 is a pig

I'd still like to get one of the replicas they're building!

Glasses · « **Reply #6 on:** December 11, 2005, 06:26:10 PM »

Not only that but the otd speed seems slower than what it was in the previous version of AH.

Karnak · « **Reply #7 on:** December 11, 2005, 06:36:55 PM »

Quote

Originally posted by Glasses
Not only that but the otd speed seems slower than what it was in the previous version of AH.

Of course they did, it is German and they hate German aircraft so they reduced the top speed of all German aircraft by 10% in AH v2.06

EDIT:

Just tested it offline at an altitude of 350ft. It decelerated to 521mph after a dive and to confirm it I slowed it down to 515mph and let it accelerate back up and it also reached 521mph. That doesn't seem like it is any slower to me.

For something fun, try this: Set all aircraft ammo to 100 times normal and then get a Me262 up to top speed at whatever altitude you chose. Then hold the trigger down. The recoil from the cannons took it down to 391mph sustained when I just did it. Took about two minutes of solid firing to so that though.

hitech · « **Reply #8 on:** December 12, 2005, 11:17:33 AM »

It climbs better at 280 because climb rate is based on excess horse power.

Strange thing about jet engines is that there power increases (not the thrust) the faster you go. So simply put the exsess power on the 262 is higher at 280 than 200 hence why it climbs better at that speed.

HiTech

frank3 · « **Reply #9 on:** December 12, 2005, 11:33:16 AM »

Do more planes have this? I mean, where can we find at what speed a certain plane climbs the best?

Golfer · « **Reply #10 on:** December 12, 2005, 11:47:19 AM »

All planes have a Vy or best rate of climb airspeed. They also have a Vx or best angle of climb.

The former is a measure of climb reference to time and the latter is referenced against distance.

Example:

*Assume no wind*

The Cessna Widget might have a Vx of 60kts. For ease of use we'll say that this is groundspeed. This will yield a 500 foot per minute climb, but it will only take the airplane 1 mile to climb 500 feet. Because it's traveling forwrd at 1 mile per minute it will take one minute to travel one mile.

The airplane will climb 500 ft per mile.

If the Cessna Widget has a Vy (best rate) speed of 120kts then it will be climbing at 1000 feet per minute but it will take it that same mile to climb to the same 500 foot point. Because the airplane is traveling at 2 miles per minute it will take 30 seconds to travel one mile.

At this speed and rate of climb the airplane climbs 500 feet per mile.

So you would climb exactly the same rate in terms of feet per mile (how far it takes to get there) but at the faster speed, you're actually climbing at twice the rate in terms of time (how long it takes to get there)

hitech · « **Reply #11 on:** December 12, 2005, 01:27:59 PM »

Frank the .speed defaults to best climb speed (i.e. Vy) at sea level.

HiTEch

Karnak · « **Reply #12 on:** December 12, 2005, 01:39:56 PM »

HiTech,

Is there a command to reset the .speed command to the Vy speed after you have set a custom .speed for a given aircraft?

Krusty · « **Reply #13 on:** December 12, 2005, 01:46:04 PM »

Quote

Originally posted by hitech
It climbs better at 280 because climb rate is based on excess horse power.

Strange thing about jet engines is that there power increases (not the thrust) the faster you go. So simply put the exsess power on the 262 is higher at 280 than 200 hence why it climbs better at that speed.

HiTech

aaahhhhh... I was wondering what the deal was!

Krusty · « **Reply #14 on:** December 12, 2005, 01:48:25 PM »

Quote

Originally posted by Karnak
HiTech,

Is there a command to reset the .speed command to the Vy speed after you have set a custom .speed for a given aircraft?

That would be much appreciated. How about if you type ".speed" with no variable, instead of saying "Speed can be set from 100 to 500mph" say "Speed has been restored to default".