On 9/23/2012 12:00 PM, wrote:


Vote is between sustainers, not including selflaunching systems! Sustainers have all very similar weight, and also pricing. The difference is in mainly in range, noise, operation, maintenance etc.

Just a few comments:
1.Manufacturers would like to produce what they will be able to sell, but is not obvious what pilots will choose. So that is the reason of this voting!
2.Using prop in regenerative way is not really efficient (maybe 5%) due to wrong airfoil curvature for this mode.
3.At Silent Electro (FES) is not possible to chose between two different packs, as this would change CG position and also total voltage

of cells, and caused some additional problems. Silent can climb about
6500' with only 30kg of batteries which is more than enough.


To what altitude can the LAK climb?


Adding more batteries would be just more costs and more weight.

Regards,

Luka Znidarsic, designer of FES system