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I have ordered a GP12 E FLEX. The -2ms speed is 185kph at max allowed
wingloading (45kg/m2). The VELO will be better than that. It is self launching of course, and the electric motor is not FES but on a pylon. This is preferable to FES because with a folding prop there is very little drag with the pylon out, and it is much more efficient aerodynamically, no FES drag (1% or so), and less battery drain! Retract takes only 5 secs anyway. Obviously an ultralight cannot compete with a fully ballasted 18m racer, but then look at the price difference, 50% including a trailer! QED At 13:46 09 December 2015, Casey Cox wrote: On Wednesday, December 9, 2015 at 12:38:14 AM UTC-5, Surge wrote: On Wednesday, 9 December 2015 01:10:25 UTC+2, Casey Cox wrote: I can understand why one would want a specific glider if one was planni= ng to compete, but with so many more advantages of having a 13.5m, I wonder= why more people do not consider them. =20 The performance of 13.5m gliders is a lot lower than even previous genera= tion glass/carbon gliders. Most of the 13.5m gliders have max L/D's in the = high 30's or low 40's and their performance drops drastically when some spe= ed is added (typically 2m/s sink rate at around the 170km/h mark). Their lo= wer wing loading limitations doesn't lend them for the booming weather foun= d in Africa/Australia/Western USA. Most of them also have much lower Vne's (around the 220 to 230km/h mark) = and this becomes an issue at higher altitudes where one becomes Vne limited= .. =20 The only benefit that I can see in owning a 13.5m glider is easier riggin= g and derigging due to lower weight components but I'm not age limited yet. I figured that but seeing someone else actually state it helps. The other = advantage you missed is Self Launch. I did not realize that Vne limitation= became a problem. (Haven't got there yet). It just seems more manufactures are building 13.5m (LAK just introduced the= Mini Lak at the 1st International 13.5m), and I wonder what sales are of 1= 3.5m compared to 15m and 18m. I'm hoping in 4-5 yrs I can be in a position to upgrade to an FES. |
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