Flying bike on telly- Bang Goes The Theory

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mrjemm
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Flying bike on telly- Bang Goes The Theory

Postby mrjemm » 26 Apr 2012, 7:57am

Just saw on breakfast telly a clip from Bang Goes the Theory about the attempt by Jem (good name!)thingywhotsit to build up a human powered flying machine, and I can't help thinking that the design is pretty poor. It surprises me they're using a sit up'n beg stance, where I'd think a 'bent stance would be better. Also, the seat/mechanism is suspended on a carbon frame, making the drivetrain go around a bend, and the frame flex. Would it not be better to have the wing raised from the main spar, so the chain/drive is all on the main support?

Whaddya thunk folk?

(another) Jem.

Edit... Wasn't sure if this should go in bikes'n bits, but not quite a bike, so put here.

tonythompson
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Re: Flying bike on telly- Bang Goes The Theory

Postby tonythompson » 26 Apr 2012, 8:38am

I think I'll stick to Virgin. 8)
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Malaconotus
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Re: Flying bike on telly- Bang Goes The Theory

Postby Malaconotus » 26 Apr 2012, 9:26am


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gaz
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Re: Flying bike on telly- Bang Goes The Theory

Postby gaz » 26 Apr 2012, 9:44am

Pah, back in the 70's people made human powered flights across the English Channel. Gossamer Albatross.
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thirdcrank
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Re: Flying bike on telly- Bang Goes The Theory

Postby thirdcrank » 26 Apr 2012, 9:53am

My memory is that for quite a long time there was a cash prize on offer to the first crew who could achieve human-powered flight. The rules stipulated a flight of at least 1000 metres over a figure-of-8 flight path. Once that had been achieved, there were a few flights over greater distances and in the absence of any further incentive, interest fizzled out.

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gaz
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Re: Flying bike on telly- Bang Goes The Theory

Postby gaz » 26 Apr 2012, 9:58am

The Kremer Prizes.

There are still some up for grabs.
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mrjemm
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Re: Flying bike on telly- Bang Goes The Theory

Postby mrjemm » 26 Apr 2012, 9:59am

I remember that (reference to Gossamer Albatros) Gaz. I think they're trying to do this in a more amateur way, and have referred to surprise at the fact it's not been done for so long. I like the idea though and don't see why they shouldn't do quite well. But still think the Dutch shopper stance is not the most efficient, even if it is less damaging to knees compared to 'bent style.

Thanks for that link Gaz. Didn't know of that.

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gaz
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Re: Flying bike on telly- Bang Goes The Theory

Postby gaz » 26 Apr 2012, 10:01am

And there's the Sikorsky Prize for human powered helicopter flight, which Mick F could have gone for if he hadn't sold his Chopper. :wink:
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Si
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Re: Flying bike on telly- Bang Goes The Theory

Postby Si » 26 Apr 2012, 1:19pm

Didn't they have human powered flight on Scrap Heap challenge a while back? If I remember they were slightly hampered by having to build it from heavy old junk, by having to do it in a day and by at least one of them being powered by a non-cyclist, so the power wasn't necessarily in the vehicle itself, but nonetheless they had a good go at it.

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al_yrpal
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Re: Flying bike on telly- Bang Goes The Theory

Postby al_yrpal » 26 Apr 2012, 1:42pm

Just seen the bang goes the theory plane on BBC South Today. It got off the ground and briefly flew but skewed off to the left. The wing touched the ground. It looks like it will go, but a few tweaks are needed.

Al
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mrjemm
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Re: Flying bike on telly- Bang Goes The Theory

Postby mrjemm » 27 Apr 2012, 8:45am

Si wrote:Didn't they have human powered flight on Scrap Heap challenge a while back? If I remember they were slightly hampered by having to build it from heavy old junk, by having to do it in a day and by at least one of them being powered by a non-cyclist, so the power wasn't necessarily in the vehicle itself, but nonetheless they had a good go at it.


Holy moley. I'd be astounded if they got anywhere near flight! I guess this was before the new format (that I don't like nearly so much).

Makes me wonder if Bango's making a meal of it though. Thing is, their's does look very professional and well made, but the points I made earlier come over as uf they've gone into it with preconceived ideas about the design. Sadly I haven't seen the show properly- saw clips as I was trying to set up an indoor antenna in my cabin window in iffy weather. And the bit on breakfast telly, followed by Mal's link.

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[XAP]Bob
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Re: Flying bike on telly- Bang Goes The Theory

Postby [XAP]Bob » 28 Apr 2012, 8:25am

If I recall it correctly the scrapheap challenge version was a grand challenge (two previous winners) and was therefore a two day challenge - mind you 20 hours with no new materials is still mighty impressive....
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mrjemm
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Re: Flying bike on telly- Bang Goes The Theory

Postby mrjemm » 28 Apr 2012, 8:53am

I do enjoy scrapheap challenge sometimes, but my god, some are just not thought out- there was one recently (admittedly on Dutch discovery, so could be very out of date) where they had to build vehicles to go through a muddy forest (was it the landmine one?) and one team decided to use a propeller for propulsion, and not even a very big one.

The original Great Egg Race was much better!

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gaz
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Re: Flying bike on telly- Bang Goes The Theory

Postby gaz » 9 Aug 2019, 4:56pm

gaz wrote:And there's the Sikorsky Prize for human powered helicopter flight,

Claimed in 2013, how did I miss that :shock: .
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kwackers
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Re: Flying bike on telly- Bang Goes The Theory

Postby kwackers » 9 Aug 2019, 5:27pm

That's quite impressive but why four large rotors? Surely smaller, faster rotating rotors would reduce the size of the arms and thus the weight by quite a lot.

Need some technical background.