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you also totally omitted hucks starters and I am gravely offended   bonus start cart in a cool paint job: 
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Oct 29, 2018 23:23
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How about windmill starting a turboprop via another turboprop in front of it blowing air (I forgot if I've read of this as actually happening, or just ha ha what if). But for sure there's its close cousin the Fairey Gannett, with its two independent coaxial engines. They'd start the front one with compressed gas (originally the shotgun shell starter mentioned earlier), and then the front one would windmill the rear one. This I've witnessed.
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Oct 29, 2018 23:27
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vessbot posted:How about windmill starting a turboprop via another turboprop in front of it blowing air (I forgot if I've read of this as actually happening, or just ha ha what if). The buddy start. There's a procedure for it for the E-2. I don't know if anyone has actually done it, though.
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Oct 29, 2018 23:31
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Question: For those cartridge starters, can you also start them with compressed air, if you can get sufficient CFM?
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Oct 29, 2018 23:40
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MRC48B posted:Question: Yes but it's not a trivial adaptation. This is exactly what's done with the flying Gannett. During the talk at OSH I was at, they talked about that modification as one of the engineering triumphs of the restoration.
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Oct 29, 2018 23:45
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vessbot posted:Yes but it's not a trivial adaptation. This is exactly what's done with the flying Gannett. During the talk at OSH I was at, they talked about that modification as one of the engineering triumphs of the restoration. Do modern warbird operators do this kind of adaptation, or are there still folks making the old-style cartridges?
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Oct 29, 2018 23:50
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That's part of why I asked. it seems like packing a compressor or dump tank would be cheaper for ferry flight starts. there is the demonstration aspect at actual air shows. IIRC some tractor coffman starters can use blank loaded 12ga shells, which are probably a lot easier to get a hold of, or even make yourself.
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Oct 30, 2018 00:02
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MRC48B posted:Question: For the B-52 I don't see why not. Bleed air from another jet engine is the main way their engines are started when they arn't doing some fancy like cart start. The normal start carts are basically just another jet engine on wheels. Enough compressed air at the right pressure and duration should be pretty comparable.
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Oct 30, 2018 00:38
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You could start a turbine with a fart, if you could fart hard and long enough.
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Oct 30, 2018 00:42
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FrozenVent posted:You could start a turbine with a fart, if you could fart hard and long enough. ... and then probably run the engine with it, too
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Oct 30, 2018 00:55
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What is it that makes that characteristic whine with an inertial starter? Sounds a lot like straight cut gear whine...?
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Oct 30, 2018 01:35
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FrozenVent posted:You could start a turbine with a fart, if you could fart hard and long enough. #Squadgoals
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Oct 30, 2018 01:52
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I've always thought a cartridge start motorcycle would be a fun toy.
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Oct 30, 2018 04:27
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slidebite posted:What is it that makes that characteristic whine with an inertial starter? Sounds a lot like straight cut gear whine...? some combination of the flywheel, its bearings, and the gear train used to spin it up. https://www.youtube.com/watch?v=kd_xVtcG5Dc (2:55)
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Oct 30, 2018 05:01
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https://www.youtube.com/watch?v=atquoUlQxiY
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Oct 30, 2018 05:41
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MRC48B posted:Question: I believe many turbine airplanes that used cartridge starters were also set up to be able to use huffer carts, since they're cheaper, less maintenance, and would be readily available at the home bases the airplanes normally flew out of. In some cases (like the F-100) airplanes were built with a cartridge system, but it was used pretty rarely. I know that at least the later models of the F-4 can use compressed air, and the current B-52 fleet uses carts as well, but they may retain the cartridge system for use in a scramble situation. azflyboy fucked around with this message at 05:50 on Oct 30, 2018 |
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Oct 30, 2018 05:47
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HookedOnChthonics posted:you also totally omitted hucks starters and I am gravely offended And yeah, electric inertial starters were a thing when electric motors were getting good but not great. Bonus, I'd assume they had provisions to hand-crank them if the batteries died. Did any cars ever use inertial starters, or were they developed after the electric motor strong enough to start a car? All I know is that a hand crank on a car could bounce back and break your wrist/arm if you weren't careful. Sagebrush posted:some combination of the flywheel, its bearings, and the gear train used to spin it up. "Modern" mechanical sirens, like the ones firefighters use to clear an intersection, are driven buy an electric motor, with a pedal to control the voltage. Back in the day, they made air-raid sirens with a Mopar Hemi and a clutch pedal (the man-portable version was hand-cranked and you cranked fast, then slow, then fast, etc..) https://www.youtube.com/watch?v=04SMJlwosZ0 https://www.youtube.com/watch?v=SA2ctPQLWy0 Also I remember a toy from the '90s sold from those machines that you put a quarter in the slot and turn the handle to get a toy in a plastic egg that used exactly the same operating principle, driven by a turbine turned by the user's breath. Haven't seen one in years, did they get banned because they were so annoying? Edit: This thing: https://www.youtube.com/watch?v=0pNWVy-yGFg Also now I want to find a machinist to remake that toy whistle in Inconel with the world's tiniest gas turbine engine as the gas generator. Is it possible to build a turbojet small enough to start it with the power of human lungs? Chillbro Baggins fucked around with this message at 13:57 on Oct 30, 2018 |
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Oct 30, 2018 13:53
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Bad Angus! Bad!
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Ooh another fun one. The pneumatic start on Yaks. It's not a turbine on the accesory drive like typical air starters, it's air going through the intake manifold distributed into the cylinders like an intake mixture, and pushes the pistons down, on what's normally the intake stroke, to turn the engine over. Not gonna work if you use nitrogen!
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Oct 30, 2018 16:02
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Chillbro Baggins posted:Don't they use a modern handheld version of tht idea to start F1 cars and/or Indycars? They do use a similar (although much more compact) starter on open wheel cars, yes. The first car with an electric starter was a Cadillac in 1912, and it was developed specifically because a hand crank injury from a Cadillac led to the death of one of the executives' friends. The starter itself was developed by Charles Kettering at Delco, and that was about six years after he had invented an electric motor to replace the hand cranks on National Cash Registers. Since both of those are motors replacing a hand crank that would have had similar 'horsepower' — albeit a cash register isn't going to kick back — I don't think there would ever have been a need for an inertial start.
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Oct 30, 2018 16:45
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Yeah, by the time car engines got powerful enough to where the compression would have been an issue, starter motors were powerful enough to handle them directly.
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Oct 30, 2018 16:48
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still, the most AI engine start: supposedly the green fireball of triethylborane and JP7 sometimes shot out up to 15 feet SR-71 Crew Chief Mike Relja posted:I remember the first time I witnessed an SR-71 with the engines running. It was sucking fuel off the floor in little tornadoes, and all the while the headers on the start carts were dumping flame on the floor. I thought these people were out of their rabbit rear end minds."
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Oct 30, 2018 17:07
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HookedOnChthonics posted:you also totally omitted hucks starters and I am gravely offended Where's the propeller?
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Oct 31, 2018 01:47
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I think it's facing the camera perfectly. If you look really close you can see something that looks like the profile of an airfoil.
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Oct 31, 2018 02:11
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Safety Dance posted:Where's the propeller? I'm going with they put it on after the engine is started
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Oct 31, 2018 02:26
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Jonny Nox posted:I'm going with they put it on after the engine is started It's like when you tighten a drill chuck by holding the chuck still with your hand while actuating the drill...
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Oct 31, 2018 02:45
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HookedOnChthonics posted:still, the most AI engine start: Goddamn the SR-71 was metal af
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Oct 31, 2018 07:20
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e.pilot posted:Goddamn the SR-71 was metal af I believe you mean alloy as gently caress 
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Oct 31, 2018 08:16
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HookedOnChthonics posted:still, the most AI engine start: 
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Oct 31, 2018 12:41
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What happens when the tail rotor gives out in a hover (Leicester fatal crash video).
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Oct 31, 2018 12:59
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Wealth would be concentrated on fewer hands if it wasn't for the equalizing efforts of private helicopters and GA.
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Oct 31, 2018 13:11
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Platystemon posted:What happens when the tail rotor gives out in a hover (Leicester fatal crash video). Poor ol' AugstaWestland... thought of ants and died.
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Oct 31, 2018 13:35
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https://i.imgur.com/QhFdmXH.gifv
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Nov 1, 2018 13:25
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I look forward to this robust technology being autonomously piloted to shuttle people around as Uber envisions. Whatever could go wrong???
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Nov 1, 2018 14:11
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They released video of the Soyuz launch https://www.youtube.com/watch?v=CrzlMTRVt_I Seems like a wild ride
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Nov 1, 2018 16:00
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LASERS!!!!!! The National Interest Online: The F-35 and F-22 are Old News: The Tempest Could Be the Future (Armed with Lasers and Hypersonic Missiles). https://nationalinterest.org/blog/buzz/f-35-and-f-22-are-old-news-tempest-could-be-future-armed-lasers-and-hypersonic-missiles Somewhere Grover is at half mast and doesn't know why...
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Nov 1, 2018 16:15
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vessbot posted:Ooh another fun one. The pneumatic start on Yaks. It's not a turbine on the accesory drive like typical air starters, it's air going through the intake manifold distributed into the cylinders like an intake mixture, and pushes the pistons down, on what's normally the intake stroke, to turn the engine over. Not gonna work if you use nitrogen! this is how all modern low-speed diesel engines are started, and many medium-speed and large high-speed diesels also e: also seen 4000-series MTU's with compressed-air powered crank starters sandoz fucked around with this message at 16:53 on Nov 1, 2018 |
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Nov 1, 2018 16:49
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So, How well or poorly known is this travel loophole?
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Nov 1, 2018 18:18
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5th freedom flights should show up on any flight search engine.
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Nov 1, 2018 18:38
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It's a market that companies like AC are aggressively pursuing. Flying Americans to Europe or Asia via Canada, especially from US markets without a direct flight to that destination. Instead of connecting through LAX or EWR or whatever, connect through YVR or YYZ instead. Even on routes with direct service, it can be competitive for a variety of reasons to 1-stop it.
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Nov 1, 2018 18:52
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Finger Prince posted:It's a market that companies like AC are aggressively pursuing. Flying Americans to Europe or Asia via Canada, especially from US markets without a direct flight to that destination. Instead of connecting through LAX or EWR or whatever, connect through YVR or YYZ instead. Even on routes with direct service, it can be competitive for a variety of reasons to 1-stop it. Those aren’t fifth freedom flights. YVR-JFK-LHR flown by a Canadian flagged airline would use rights to the 5th freedom of the air in the US. https://www.icao.int/pages/freedomsair.aspx
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Nov 1, 2018 19:12
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