I don't think that'd be too bad at that TL, interceptors...intercept things. The aMR being crappy means that you're not going to send this thing after fighters, but after bombers, which would likewise have crappy aMR.
On Fri, Jul 24, 2015 at 8:05 AM, Onno Meyer <[email protected]> wrote: > Brandon replied to me: > > >> Any mistakes so far? >>> >> >> None that I see. >> >> Worth noting that the Me 163 had a higher top speed (almost 600 mph) and >> a lower thrust ratio (0.52), but I don't know if you'd consider it late TL6 >> or early TL7. >> >> Also, for high top speed and low stall speed, see the proposed Vought >> XF5U and the prototype V-173, >> >> Brandon >> > > Err, that was the top ground speed (and it was wrong, I multiplied where I > should have divided). I'm aiming for a top air speed in excess of Mach 2. > > And from another reply: > > So making the aircraft larger increases stall speed and top speed by the >>> >same factor. This can be done until stall speed reaches top ground >>> speed. >>> >> Oh, wait. IIRC, increasing size increases surface area, which increased >> drag, which reduces top speed. >> > > For constant density and a constant engine percentage (i.e. all other > things being equal), the thrust goes up faster than the drag. > > Ewt 20,000 lbs., volume 1,000 cf, area 600 cf, density 28 lbs. per cf > accounting for the radical streamlining. Drag is 15. > > A 5,000-lbf. engine is 2,000 lbs. and 80 cf. Fuel for 120 minutes nominal > consumption is 1,000 gallons, 8,000 lbs., 150 cf. That leaves 168 cf and > 10,000 lbs. for structure/armor and the payload. > > Stall speed 190 mph. > Top ground speed 195 mph. It might be wise to invest in improved > suspension for 220 mph. > Top air speed 1,580 mph. > > aMR 0.125, aDecel 0.5 mph/s. Those two stats probably kill the concept as > an interceptor, but perhaps it might make a low-tech mail plane. Call it an > 1,000-mile dash with a ton of mail in 40 minutes flight time. It certainly > beats the overnight train. > > > Regards, > Onno > > _______________________________________________ > GurpsNet-L mailing list <[email protected]> > http://mail.sjgames.com/mailman/listinfo/gurpsnet-l > -- Stephen Rider _______________________________________________ GurpsNet-L mailing list <[email protected]> http://mail.sjgames.com/mailman/listinfo/gurpsnet-l
