Garfly Posted December 11, 2021 Author Share Posted December 11, 2021 Afternoon naps are normal at our age. 1 Link to comment Share on other sites More sharing options...
facthunter Posted December 11, 2021 Share Posted December 11, 2021 I've outgrown them. . At my age you don't have time for them. Nev 6 Link to comment Share on other sites More sharing options...
BrendAn Posted December 12, 2021 Share Posted December 12, 2021 On 29/04/2021 at 12:21 PM, facthunter said: There are Wankels flying in Australia. Nev There are 1 or 2 in most clubs😆😁 2 6 Link to comment Share on other sites More sharing options...
Garfly Posted December 26, 2021 Author Share Posted December 26, 2021 Link to comment Share on other sites More sharing options...
Flightrite Posted December 27, 2021 Share Posted December 27, 2021 Pie in the sky stuff for all of us alive today😂😂😂 2 Link to comment Share on other sites More sharing options...
octave Posted March 18, 2022 Share Posted March 18, 2022 Textron buys electric aircraft maker Pipistrel for new sustainable aircraft unit 1 Link to comment Share on other sites More sharing options...
Thruster88 Posted March 18, 2022 Share Posted March 18, 2022 (edited) Nice line of aircraft. They have all the good brands, Cessna, Beechcraft and lycoming. I think the Panthera is what Textron wants to complete their lineup. A worthy competitor to the Cirrus. Edited March 18, 2022 by Thruster88 1 Link to comment Share on other sites More sharing options...
Garfly Posted April 20, 2022 Author Share Posted April 20, 2022 Swedish sports car maker Koenigsegg are now touting the aerospace cred of their new Quark/Terrier electric motors: "The Quark is unique in its high efficiency in combination with its class-leading torque-to-power-to-rpm-to-weight matrix. This means, when using the Quark in applications such as marine, aircraft or VTOL, there is no need for a step-down transmission, instead direct drive can be achieved, as the RPM of the motor is right from the get-go. Small high-revving motors can have higher peak power to weight ratio, but they need transmissions in most applications in order to get to the desired output rpm and torque, causing energy loss and adding weight and complexity to do the same job. So any benefit in size is lost. In other cases, like the Terrier application, the transmissions can be reduced in size and complexity compared to higher-revving, less torque dense motors, which is also a big win. I guess we’re trying to reach the edge of optimal in-betweeness. —CEO and Founder Christian von Koenigsegg Source: https://www.greencarcongress.com/2022/02/20220203-quark.html 1 1 Link to comment Share on other sites More sharing options...
Jabiru7252 Posted April 20, 2022 Share Posted April 20, 2022 Rambles on a bit... 1 1 Link to comment Share on other sites More sharing options...
pmccarthy Posted April 20, 2022 Share Posted April 20, 2022 3 minutes ago, Jabiru7252 said: Rambles on a bit... Yes, the nonsense drove me away. 1 Link to comment Share on other sites More sharing options...
Flightrite Posted April 20, 2022 Share Posted April 20, 2022 It really is pie in the sky stuff but entertaining 😂👍 Link to comment Share on other sites More sharing options...
spacesailor Posted April 20, 2022 Share Posted April 20, 2022 Why use one large motor. Three or more, each with sprag clutch , driving the prop gear. ( reduction gear from sprag ) ALL On to climb, one third off for cruise, then two thirds Off to decend. Only two thirds of the big single for cruising would extend battery life !. spacesailor Link to comment Share on other sites More sharing options...
kgwilson Posted April 21, 2022 Share Posted April 21, 2022 The latest is a ground effect electric hydrofoil/aircraft called a Seaglider.. They are planning to use these around NZ from 2025 as most of the population live on the coast. They will take 100 passengers from coastal town to town at around 540kmh (290 knots) at an altitude of 10 metres. In the unlikely event that it runs out of battery power it just lands on the water & they wait to be rescued. https://www.stuff.co.nz/business/128397643/transport-revolution-touted-electric-seagliders-to-connect-nz-cities-by-2025 1 3 Link to comment Share on other sites More sharing options...
Marty_d Posted April 21, 2022 Share Posted April 21, 2022 2 hours ago, kgwilson said: ... it just lands on the water & they wait to be rescued. 100 passengers = 100 oars... 2 Link to comment Share on other sites More sharing options...
onetrack Posted April 21, 2022 Share Posted April 21, 2022 So ... does the SeaGlider come under Maritime control, or Aviation control - or both?? Where would these things fit into the rules of boating? Would sail and power still get right of way over a ground effect craft? What do they do about sea fog? - a common occurrence. Do they drop back into the water at a "safe speed" (i.e. - a few kts) and sound their foghorns? Link to comment Share on other sites More sharing options...
Marty_d Posted April 21, 2022 Share Posted April 21, 2022 At 540kph I can't see it dodging sailboats. As long as the mast is under 10m they should be fine... Link to comment Share on other sites More sharing options...
onetrack Posted April 21, 2022 Share Posted April 21, 2022 Unfortunately, there's a lot of shipping that's a lot higher than 10M in height, so right there, is a need for SeaGlider separation from ocean-going craft. And if they're operating coastal, that's where the most boating traffic will be.... Link to comment Share on other sites More sharing options...
kgwilson Posted April 22, 2022 Share Posted April 22, 2022 Lots of things to consider. I wouldn't want to be out fishing in my tinnie with an 8 engined monster bearing down on me at 540 kmh. One would hope that the ex Boeing engineers will ensure that Regent won't go down the same profit before safety path of their ex employer. 1 Link to comment Share on other sites More sharing options...
kgwilson Posted April 22, 2022 Share Posted April 22, 2022 This is what it would feel like. 1 3 Link to comment Share on other sites More sharing options...
BrendAn Posted May 14, 2022 Share Posted May 14, 2022 This would be a worry in an aircraft. https://www.facebook.com/reel/324832726421026?fs=e&s=cl Link to comment Share on other sites More sharing options...
onetrack Posted May 15, 2022 Share Posted May 15, 2022 (edited) The percentage of EV fires is probably lower than the percentage of IC vehicle fires. I think I've personally witnessed, and seen local news items, for a total of about 8 or 10 IC-engine vehicle fires, just this year alone. Even diesel-powered trucks feature regularly in vehicle fires. I would hazard a guess (which is true for IC-engine vehicles), that the greatest source of fire potential (for EV, IC-engine, or aircraft) is in the wiring harness - and how the harness is installed and run, and how it is protected, features very largely in the fire risk potential. The second greatest fire threat in IC-engine vehicles is the exhaust manifold and turbo area. Blown turbo oil lines regularly cause fires (when hot oil sprays onto hot exhaust manifolds) and hoses and wiring coming into contact with a hot exhaust manifold, also cause fires. At least with electric power, you don't have a red-hot exhaust manifold posing a continuous fire threat that needs careful management. If you crash in an aircraft, your chances of a major fire starting, thanks to a hot manifold, are exceptionally high. Edited May 15, 2022 by onetrack 1 Link to comment Share on other sites More sharing options...
spacesailor Posted May 15, 2022 Share Posted May 15, 2022 onetrack I agree tottaly. Putting the Main harness behind the cylinder head in cars !, ( on the firewall. ) So in a headon crash the motor crushes that harness between the firewall & head. AND More often next to a fuel vapour/return, Plastic hose. spacesailor 1 Link to comment Share on other sites More sharing options...
spacesailor Posted May 15, 2022 Share Posted May 15, 2022 Lucky my half VW, has No exhaust manifold, is a very short pipe And never glows red, ( per side ) Not yet And in a nose down would possibly break the two 8 mm bolts off leaving those hot pipes on the ground. spacesailor 1 Link to comment Share on other sites More sharing options...
BrendAn Posted May 15, 2022 Share Posted May 15, 2022 (edited) Yes I agree. But there are a lot more ic cars than electric. I just came across it and thought it might be of interest. I know of one hangar where lithium batteries are banned because of 2 igniting while on charge. Edited May 15, 2022 by BrendAn 1 Link to comment Share on other sites More sharing options...
FlyBoy1960 Posted May 15, 2022 Share Posted May 15, 2022 They only catch on fire when you use the wrong charger. You cant use a "normal" lead acid charger Link to comment Share on other sites More sharing options...
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