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bandit
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PostPosted: 26-May-2003 09:41    Post subject: looking for suggestion.... Reply to topic Reply with quote

I was reading the overview about the repair
facility on tro25,and therafter try to
reproduce on a CBT scale using standard
map.
The fluff say that should be also an airfield
and than how many map should I need in total?
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Ronin
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PostPosted: 26-May-2003 11:35    Post subject: RE: looking for suggestion.... Reply to topic Reply with quote

Well, if you plan on having heavy cargo lifters fly in, you'll need a runway of at least 10,000 feet in length, if not more. My handy E6-B tells me that converts to 3048 meters, which is 101.6 hexes, round up to 102 hexes. Each map sheet is 18 hexes long, so that comes out to 5 and 2/3 map sheets, or 6 map sheets all together if you add in the overrun extensions to the end of the runway, plus the ILS and VASI equipment.
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bandit
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PostPosted: 30-May-2003 09:48    Post subject: RE: looking for suggestion.... Reply to topic Reply with quote

thanks a lot
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Paul
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PostPosted: 30-May-2003 10:29    Post subject: RE: looking for suggestion.... Reply to topic Reply with quote

Strict Aerotech 2 rules requires 600 meters (bit over a standard map) for successful landings and takeoffs for all craft *including* aerodyne DropShips. I'd make it fairly broad, twice the wingspan of the largest atmosphere capable Aerodyne.

Yeah, that's pretty short compared to modern craft. It's mostly because the vast majority of BT craft lift off and fly on their immense thrust, as opposed to their fixed wing lift force.

Paul
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Ronin
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PostPosted: 30-May-2003 16:01    Post subject: RE: looking for suggestion.... Reply to topic Reply with quote

Actually, higher thrusts would probably require longer runways, since that is usually needed for higher flying speeds. Higher flying speeds usually require higher minimum takeoff (rotation) speeds, unless the aircraft has V/STOL equipment. Even then, you have to consider landing distances are usually longer than required takeoff distances, especially when the weather is less than perfect.

As to runway width, I would recommend a bare minimum of 150 feet. 250 feet or more would be better.
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Paul
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PostPosted: 31-May-2003 08:53    Post subject: RE: looking for suggestion.... Reply to topic Reply with quote

Quote:

Actually, higher thrusts would probably require longer runways, since that is usually needed for higher flying speeds.



?
If you mean with flying speed, the speed you need to get enough air flowing across the wings, I can see your logic.

However, AT craft typically do not rely on their aerodynamic profile to provide lift. They fly almost entirely on thrust, and as such, their speed and the runway length is irrelevant.


Quote:

Higher flying speeds usually require higher minimum takeoff (rotation) speeds, unless the aircraft has V/STOL equipment.



That's pretty much what they have, since even Aerodyne DropShips only need 600 meters for takeoff and landings.
Heck, fighters and shuttles can land in just 300 meters.


Quote:

Even then, you have to consider landing distances are usually longer than required takeoff distances, especially when the weather is less than perfect.



It doesn't look like weather is a big influance on AT2 craft. Which makes sense if the bulk of their lift ability (if not all of it) relies on thrust rather then aerodynamics.

As such you can operate just about any craft off of rather small airfields. Nice military advantage.

Paul
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Ronin
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PostPosted: 04-Jun-2003 12:16    Post subject: RE: looking for suggestion.... Reply to topic Reply with quote

Weather always has an effect on aircraft, but it was probably ignored in the AT2 rules for simplicity. The same with the take-off and landing distances: they were set to be easier to play with rather than being entirely realistic. The recommendations I made are based on the fact that the Battletech universe, particularly the 3025 era, has a mixture of advanced technology (which is increasingly scarce) and the more common older technology (some of which even we would consider old). You can't assume that every aircraft coming into your field has VSTOL capability, so the runway would need to be long enough to accommodate some of the older technology aircraft. The base may originally have been built with teh shorter runways, but like everything else in 3025, it would have been adapted and modified to make it more compatible with the older technology that is being relied upon as the newer technology disappears.

Besides, ask any pilot: there is never too much runway in front of you.
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