FES vs Gas Engine – Finding a Thermal?

sunnuntai 27. elokuuta 2017 0.08.34 UTC+3 Dave Nadler kirjoitti:
On Saturday, August 26, 2017 at 12:43:51 PM UTC-4, wrote:
Not the answer for everybody, but try a jet!

I think all of my buddies with jet (JS) have had at least one failure.
None of these contraptions is 100% or even close.
Plan A is always landing.
If it starts, be delighted.
WHEN it DOES NOT start, just finish the landing.

Be safe out there,
Best Regards, Dave

I've heard also that starting a jet (also JS) is far from foolproof. Apparently you have to sit trough whole start-abort-cycle and attempting restart takes very long time.

At the 18 meter Nationals in Uvalde this month one would imagine there were multiple in air-starts. The only one I had heard of that did not start was the jet on a Jonkers. Having owned several lawn mower sustainers, I wonder if it is feasible for a sustainer electric pylon, or would the weight be effectively the same as a self launch?

On Sunday, August 27, 2017 at 12:38:53 AM UTC-7, krasw wrote:
sunnuntai 27. elokuuta 2017 0.08.34 UTC+3 Dave Nadler kirjoitti:
On Saturday, August 26, 2017 at 12:43:51 PM UTC-4, wrote:
Not the answer for everybody, but try a jet!

I think all of my buddies with jet (JS) have had at least one failure.
None of these contraptions is 100% or even close.
Plan A is always landing.
If it starts, be delighted.
WHEN it DOES NOT start, just finish the landing.

Be safe out there,
Best Regards, Dave

I've heard also that starting a jet (also JS) is far from foolproof. Apparently you have to sit trough whole start-abort-cycle and attempting restart takes very long time.

Jonathan St. Cloud wrote on 8/27/2017 2:58 PM:
At the 18 meter Nationals in Uvalde this month one would imagine there were multiple in air-starts. The only one I had heard of that did not start was the jet on a Jonkers. Having owned several lawn mower sustainers, I wonder if it is feasible for a sustainer electric pylon, or would the weight be effectively the same as a self launch?

Schleicher provides the ASG 32 EL, an electric sustainer version of the ASG 32.


--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
- "Transponders in Sailplanes - Dec 2014a" also ADS-B, PCAS, Flarm

http://soaringsafety.org/prevention/...anes-2014A.pdf

On Sunday, August 27, 2017 at 5:58:39 PM UTC-4, Jonathan St. Cloud wrote:
...I wonder if it is feasible for a sustainer electric pylon, or would
the weight be effectively the same as a self launch?

A huge % of the weight of electric is in the battery.
As the electric motor is relatively light, might as well do self-launch...

On Sunday, August 27, 2017 at 5:58:39 PM UTC-4, Jonathan St. Cloud wrote:
At the 18 meter Nationals in Uvalde this month one would imagine there were multiple in air-starts. The only one I had heard of that did not start was the jet on a Jonkers. Having owned several lawn mower sustainers, I wonder if it is feasible for a sustainer electric pylon, or would the weight be effectively the same as a self launch?

I'm working on conversion of ASW-24E from Rotax shaker to pylon mounted electric as I write this. Weight change will be about 8 lb and CG move forward..
UH