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Old Apr 08, 2006, 01:33 PM
Moerdogg is offline
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Mo' money mo' problems
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Hans: as an alternative to an internship, you may check out what kind of research professors at your school are doing. The benefits of this are severalfold (excluding the whole poor-as-hell part): you'll most likely get to do much more hands-on research than the average summer internship, you'll get an excellent reference, and generally profs have GREAT connections. Oh, and you can come in to work whenever you want, instead of 8. I seriously regret not having done more research as an undergrad, so I'm trying to pass the info along.

And on an unrelated note, do you row for Wisconsin? I saw the shirts you were wearing in a couple of pics, and so I'm guessing from there... If so, good for you. Sounds like they have an excellent program. I rowed in college, and sucked, but I loved it all the same.
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Old Apr 08, 2006, 06:00 PM
sonic liner is offline
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Thanks Wilber and Orville !.
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Keep up the good work..Hans.
If you build it they will come...

Pete
Old Apr 10, 2006, 12:49 PM
flybike is offline
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Lance Armstrong- 7 times!
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Thanks for the replies about summer work. I also received a couple emails, thank you. Anyone else?

Moerdogg- I used to row for Wisconsin, it was a lot of fun. I still have a bunch of shirts left.

Hans
Old Apr 10, 2006, 05:13 PM
rroback is offline
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Convert!
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coming from a now 2nd year aerospace engineer major... finding summer work sucks. I'm in a huge area for aero stuff ( so cal) and it's hard. they can simply get more experienced people ( seniors..grad students..) for the same pay as us. I'm taking summer school instead, and teaching sailing.

Rhett
Old Apr 10, 2006, 05:52 PM
Aio_1 is offline
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Registered User
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Quote:
Originally Posted by rroback
coming from a now 2nd year aerospace engineer major... finding summer work sucks. I'm in a huge area for aero stuff ( so cal) and it's hard. they can simply get more experienced people ( seniors..grad students..) for the same pay as us. I'm taking summer school instead, and teaching sailing.
I've just got my MSc but there's no aerospace design going on in Ireland and I don't particularly want to move to USA, France, UK or elsewhere.
I wouldn't work for a military outfit so my main options would be Airbus (France of UK), Boeing (Seattle) or an automotive company (perhaps an F1 team!).
I think I'll probably go back to my previous line of work in medical device manufacturing. I did know this would be the dilema when I started the MSc but I thought I'd give it a try and decide how to proceed when I finished.
Old Apr 10, 2006, 06:50 PM
chase4556 is offline
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NSDQ!
so i didnt read through all the pages...did this 50footer actually get built? or is it in the process?
Old Apr 10, 2006, 08:28 PM
reills is offline
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Go Forward, but Remember
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Big Floyd was built and one attempt to fly where the "gearbox" seized on the attempt. Another tranny is in the works and the big pink Floyd will rise.
Old Apr 13, 2006, 10:42 PM
Keith43221 is offline
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Got H2? Fuel Cell R/C Car
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Hey guys, I think Flybike should make up some of these and drop them off this Floyd
https://www.rcgroups.com/forums/show...56#post5330133
"Flying Sidewinder Missile
Old Apr 29, 2006, 10:06 AM
On Hold is offline
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Tried to access http://www.pinkfoamplanes.com/ in the last two days without luck. Hope to see it back online soon.
Old Apr 29, 2006, 12:49 PM
flybike is offline
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Lance Armstrong- 7 times!
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Yeah, I dont know what the deal with that is, I'm going to try to get it back online.

Hans
Old Apr 29, 2006, 04:42 PM
flieslikeabeagle is offline
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Got shenpa?
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Quote:
Originally Posted by reills
Big Floyd was built and one attempt to fly where the "gearbox" seized on the attempt. Another tranny is in the works and the big pink Floyd will rise.
How about a Trimotor Floyd? Three smaller props, no gearbox...

Probably less efficient due to the reduced total propeller disc area, but it might at least get Don't-Fly Floyd off the ground and in the air.

-Flieslikeabeagle
Old Apr 30, 2006, 12:12 AM
theKM is offline
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↓↘→ + (punch)
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Quote:
Originally Posted by flieslikeabeagl
How about a Trimotor Floyd? Three smaller props, no gearbox...

Probably less efficient due to the reduced total propeller disc area, but it might at least get Don't-Fly Floyd off the ground and in the air.

-Flieslikeabeagle
It's only more prop disc because the gearbox prolly had a reduction gearbox at the same time as combining the three motor's power. But, with the same reduction ratio, the total prop disc of three motors pushing individual props as opposed to one prop is larger... far larger. Multi-motor planes have more power than planes with a single prop and the same total engine capacity... for reason of prop disc area.
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Old Apr 30, 2006, 12:43 AM
flieslikeabeagle is offline
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Got shenpa?
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Quote:
Originally Posted by theKM
It's only more prop disc because the gearbox prolly had a reduction gearbox at the same time as combining the three motor's power.
Yes indeed! The original setup used a belt-drive and I think about 4:1 reduction ratio (I forget the exact number). Even so, the original propeller was absurdly small when compared to the wingspan of this 50' brute.

Thanks for the clarification about multiple propellers having more disc area if the reduction ratio is taken out of the equation. I had wondered about this for a second or two, but didn't take the time to think it through earlier.

I assume this area increase comes from the (diameter^4) term in the formula for power absorbed by a propeller. Going to a twin engine setup with half the power absorbed by each propeller at the same RPM results in only about a 16% reduction in prop diameter (reduces to 84% of original), and consequently about a 29% reduction in each prop disc area. With two props that means the new total disc area is about 41% bigger than the original single prop.

The numbers are even better with a trimotor setup: 1/3 the power to each prop would result in a 24% reduction in diameter of each one, or a 42% reduction in the disc area of each prop. With three props, the total disc area would then be 73% bigger than the original single prop.

Before Flybike came by those three giant AXI outrunners, I remember someone suggesting simply mounting a couple dozen Speed 600 motors all over Big Floyd. With appropriate gearing on each one, that might not have been an entirely bad idea!

-Flieslikeabeagle
Old Apr 30, 2006, 01:10 PM
flybike is offline
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Lance Armstrong- 7 times!
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I think it would be fun to mount something like 50 komodo motors all along the leading edge. The only problem with this is that I need as much weight as I can get up in the very front. hmm Can you imagine the sound of 50 little 10 inch props?
Old Apr 30, 2006, 01:18 PM
flieslikeabeagle is offline
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Quote:
Originally Posted by flybike
Can you imagine the sound of 50 little 10 inch props?
It would probably add to the effect if you ran around screaming "The killer bees are coming! The killer bees are coming!".

-Flieslikeabeagle


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