Anthony wrote: > While the rules in GURPS Vehicles fail to reflect this, ducted fans are > aerodynamic lift and need considerable area (the actual peak lift of a > ducted fan is proportional to Power^2/3 * Air Density^1/3 * Fan Area ^ > 1/3).
... which is why my TL10 battlesuit transport uses two large fans rather than a few smaller ones. But there is the proverb that with enough thrust, even a brick can fly. Consider this bird, not armed but with plenty of reserve thrust. SAR Shuttle v1.0 (TL10) Copyright 2009 by Onno Meyer The SAR Shuttle is a search and rescue craft for orbital and surface starports. It can operate in atmosphere or vacuum, and respond quickly with a top speed over Mach 2. The Shuttle has seats for five crew (pilot, co-pilot, navigator, and two medics or surgeons) and a dozen survivors, two of them in automeds for intensive care. The airlock, large for a craft of this size, holds four suited humans at a time. The Shuttle can touch down on water and dry land, but a winch is provided for rescues from confined areas. An advanced sensor suite helps to locate the accident site. Subassemblies: Body +6. Powertrain: Two 75,000-lb. vectored super reactionless thrusters; two 40,000-kW fusion reactors; twenty 360,000-kWs rechargeable power cells. Occ: 3 RCS, 12 RS. Cargo: 50 cf Armor F RL B T U Body: 4/200 4/200 4/200 4/200 4/200 Equipment: Body: Two extreme-range radios with scramblers; two medium-range VLF radios; four long-range laser communicators; two medium-range sonar communicators; two 250-mile AESAs; 5-mile active/passive sonar; two 250-mile PESAs; 100-mile multiscanner; surveillance sound detector, level 10; two flight data recorders; three sets of precision navigation instruments; three IFF; three inertial navigation systems; two military GPS; terrain-following radar; three C6 hardened microframes with three terminals; compact fire suppression system; ST 150 winch; two automeds; diagnosis table; four-man airlock; high-security alarm; cramped toilet; two 10-man full life systems; 15 crashwebs. External: Radiation shielding. Statistics Size: 40'x20'x10' Payload: 2 tons Lwt.: 50 tons Volume: 5,000 cf Maint.: 16 man-hours Price: $11,252,900 HT: 11. HPs: 3,000 Body wSpeed: 55 wAccel: 30 wDecel: 10(25) wMR: 0.5 wSR: 7 Draft 3.1'. Flotation rating 156.25 tons. aSpeed: 1,675 aAccel: 30 aDecel: 10 aMR: 2.5 aSR: 4 sAccel: 1.5 G sMR: 1.5 Design Notes Body is 5,000 cf, with total compartmentalization, underbelly skids, lifting body and very good streamlining. Structure is medium, advanced. Armor is advanced composite. Self-sealing. Computerized controls with duplicate maneuver controls. 38.6 cf of empty space. Empty weight is 96,000 lbs. The vehicle uses the design rules from Vehicles [second edition, third printing, January 2007 errata], VXi and VXii (including the armor volume rule) with the text format from Vehicles Lite. Regards, Onno _______________________________________________ GurpsNet-L mailing list <[email protected]> http://mail.sjgames.com/mailman/listinfo/gurpsnet-l
