Author Topic: Terminal Velocity of Falling Objects Question (Read 2311 times)

Kermit de frog · « **Reply #45 on:** October 23, 2009, 05:05:21 PM »

Quote from: Ghosth on October 23, 2009, 05:04:05 PM

HT explained this one at the con.

The short answer is that the Bombsight allows for crosswinds when you calibrate.

What's the long version?

oneway · « **Reply #46 on:** October 23, 2009, 05:07:06 PM »

Quote from: Ghosth on October 23, 2009, 05:04:05 PM

HT explained this one at the con.

The short answer is that the Bombsight allows for crosswinds when you calibrate.

boomerlu · « **Reply #47 on:** October 23, 2009, 05:15:46 PM »

Quote from: Ghosth on October 23, 2009, 05:04:05 PM

HT explained this one at the con.

The short answer is that the Bombsight allows for crosswinds when you calibrate.

HOLY CRAP that's awesome.

Is that how things were historically?

Strip · « **Reply #48 on:** October 23, 2009, 05:21:17 PM »

Quote from: oneway on October 23, 2009, 02:10:24 PM

Wrong on both counts

In AH, sir, you would be misinformed.....

Baumer · « **Reply #49 on:** October 23, 2009, 06:11:45 PM »

Von,
My response was to answer the third post by the OP. The initial question was about terminal velocity, but the more complete question was about crosswinds. That is what I was answering, and the test I ran is at odds with what Hitech stated at the CON, just like Ghosth posted.

Baumer · « **Reply #50 on:** October 23, 2009, 06:14:50 PM »

oneway,
When dropping bombs with a headwind or tailwind the key to hitting the target, is to match the calibrated speed to the ground speed, not the true air speed.

Brooke · « **Reply #51 on:** October 23, 2009, 06:16:58 PM »

In case of interest (worked out several years ago for the Stalin's Fourth scenario):

http://electraforge.com/brooke/flightsims/aces_high/levelBombing/bombingInWind.html

Strip · « **Reply #52 on:** October 23, 2009, 06:19:14 PM »

Dang Brooke, give up all our secrets why don't you, he was thinking that every layer effects bomb trajectory.

That would have kept him busy for days.....

Strip

boomerlu · « **Reply #53 on:** October 23, 2009, 06:31:23 PM »

Quote from: Brooke on October 23, 2009, 06:16:58 PM

In case of interest (worked out several years ago for the Stalin's Fourth scenario):

http://electraforge.com/brooke/flightsims/aces_high/levelBombing/bombingInWind.html

Wow you used perturbation theory.... last time I used that was for quantum. Looks like a very good analysis right there. Should be on the trainer site... if it isn't already.

Out of curiosity, about how fast must the crosswind be to have a noticeable effect on the impact site assuming no bomber drift?

Brooke · « **Reply #54 on:** October 23, 2009, 06:38:25 PM »

Quote from: boomerlu on October 23, 2009, 06:31:23 PM

Out of curiosity, about how fast must the crosswind be to have a noticeable effect on the impact site assuming no bomber drift?

You mean where the bomber is in a wind layer of 0 wind, but under it is a wind layer of some velocity? I haven't worked out what the speed would need to be, but it would be much higher than any realistic wind. Even in cases with the bomber in a calm layer (zero wind) at 10k, and under it all the way to the ground is a 30 mph crosswind, it didn't have any significant effect on side deviation of bomb-impact point. That's the third picture of the drop from the Ju 88.

boomerlu · « **Reply #55 on:** October 23, 2009, 06:45:23 PM »

Yes, that's what I meant. Thanks for the info... I guess that's what I get for not working out the numbers... I go off on a hugearse tangent about differential equations and nonlinearity and the inability to actually solve the equation when the actual change due to wind layer drag is very small.

Bosco123 · « **Reply #56 on:** October 23, 2009, 09:01:42 PM »

Can I assume that the bomb falls 45 degrees?

oneway · « **Reply #57 on:** October 23, 2009, 09:22:21 PM »

Quote from: Baumer on October 23, 2009, 06:14:50 PM

oneway,
When dropping bombs with a headwind or tailwind the key to hitting the target, is to match the calibrated speed to the ground speed, not the true air speed.

Of course....

Did I mis-speak?

Oneway

oneway · « **Reply #58 on:** October 23, 2009, 09:25:52 PM »

Quote from: Bosco123 on October 23, 2009, 09:01:42 PM

Can I assume that the bomb falls 45 degrees?

No

Strip · « **Reply #59 on:** October 23, 2009, 09:47:38 PM »

I sure at one microsecond in time you could....

Aces High Bulletin Board