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All Forums >> Radios, Batteries, Clubhouse and more >> RC Humor >> Damage proof propellors
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Damage proof propellors - 3/19/2006 7:51:46 AM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline
I am basically a cheapskate, I hate to spend money. If I break the fuselage in two a little CA fixes it, a hole in a wing? That’s why I save Monocote scraps. Rip the gear off? Some plywood and epoxy. But ruin a prop? That takes money.

I started researching on prop durability, and reached the conclusion that no props on the market would survive a landing at a 45 degree down angle with the engine at full throttle.

This meant it was time for some more research, and development of a better propellor.

Tried aluminum, both cast and machined. The cast props broke, the machined billet blades would bend. Not satisfactory.

Tried steel. Same thing. When it hit the asphalt, the asphalt won.

I thought back to when I was preparing and servicing race car engines, and remembered “Mallory Metal.” MM is more dense than lead, extremely strong, and can be machined with carbide tools and ground to a great finish. This time, the 14x8 three bladed prop hit the asphalt, the asphalt looked like some one had been at it with a pneumatic hammer. The $30 Tru-Turn spinner was shattered, the mounting lugs were broken from the $85 crank case, and the shaft was bent like a pretzel, but the prop looked like new. Success. A damage proof propellor.

Still had a problem though. The 14x8 three blade prop made from MM weighed four pounds. Great idle at 1200 rpm, and while it took a while to spool up there was NO engine vibration. It was just so heavy the plane almost wouldn’t get off the ground.

I consulted with a young genius I know, named Jason Fox. You may have seen him in the comic strip Fox Trot, in real life he’s even smarter.

More research, a lot of book work and computer time checking the numbers, and we figured how to neutralize the gravitons in the metal. While the mass didn’t change, keeping the smooth running, the weight of the prop was reduced to zero. With a little more research we found out how to reverse the polarity of the gravitons, and pumped them all back into the prop. Now the prop weighed minus four pounds, and took care of the nose heavy condition the plane had always been plagued with.

So, having developed this super prop and fantastic metal, why don’t you see more application?

Well, it happened like this. My next 45 degree landing tore one engine completely off the airframe, with the engine weight of only 16 ounces the minus four pound prop took the engine in a vertical line straight up. Accelerating all the way. It hit Mach about 150 feet in the air and kept speeding up. An extremely loud sonic boom shook the entire panhandle of Florida. He last we saw of it was a red streak as it exceeded interplanetary velocity and burned up before leaving the atmosphere.

Since I was flying on a Navy facility the Navy was there suddenly, shortly followed by the FAA wanting to know who was exceeding 250 knots at such a low altitude. Soon after that NASA showed up, they wanted to know who was shooting such a powerful rocket without their permission, and to learn how we had done it. Finally, the ATF and Homeland Security came in the same car wanting to confiscate the gun we used, and throw us in jail as “Detainees” until we gave in to the torture and told them how to do it.

Jason and I were handcuffed and thrown in separate cars so we couldn’t dream up a story together, then interrogated separately for almost an hour. No one would believe we didn’t have a huge cannon, or a super rocket until one of the ATF types went over to the crash site and picked up the rest of the plane. As he did it, the other engine separated. Yep. Another sonic boom and red streak.

So now Jason and I are accompanied 24 hours a day by four knuckle draggers, not allowed to be in private with anyone, the government has taken all our research papers, tools, and materials. We aren’t even allowed to talk about “Deflated Uranium” to anyone. Or to talk about anything else either. That’s why this is written on toilet paper, I hope I can get it smuggled out. If you find it please call our lawyers, see if they can get us out of here!

Thanks in advance.

Bill.




< Message edited by William Robison -- 3/19/2006 7:52:56 AM >


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RE: Damage proof propellors - 3/19/2006 1:48:55 PM   
shakeelsid



Posts: 193
Joined: 1/7/2005
From: Dublindublin, IRELAND
Status: offline
wow Bill,
Now tell me, how big is your cell. I have this fly-powered 3D model that wouldnt fly in my dining room - there is simply too much room and the plane wouldnt simply perform anything else than wing hanging, and that only at 60,000 beats per minute - I reckon it has something to do with rarity of air, with molecules spread out all across that cavernous space. I was thinking that since you federal prisoners are kept in small cells and allowed to breath normally, you guys must have a dense air around you that I could play with. How say I smuggle my model in and your toilet roll out, and you could perhaps evaluate the subsonic flight envelope for me. I could supply you with a replacement toilet roll for a full flight report and you could even use some of the roll for cleaning your posterior residues.
Smells like a plan to me, whats your take on it.
cheers
Sid

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May the sky be always blue as you fly across it, and may the earth rise softly to meet you at your destination

(in reply to William Robison)
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RE: Damage proof propellors - 3/19/2006 6:09:14 PM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline
Sid:

I can understand your wanting to take advantage of the more dense air here, but it's not excess oxygen. It is, however probably an atmosphere your common fly would sppreciate - we have not been allowed to bathe since we were incarcerated. you can SEE the air. A book flies like a frisbee in the open. I'm sure your micro-3D plane would fly for three or four minutes with just a hand launch, and indefinitely the fly on the front.

So, for two reasons I must reject your request for experimental assistance. One, With the air dense to the point of being almost liquid all experimental results would have no validity in normal circumstances, and two, it wont help us GET OUT OF HERE!

Thanks anyway.

Bill.


_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to shakeelsid)
       Post #: 3

RE: Damage proof propellors - 4/1/2006 1:37:23 PM   
Mike Bogh



Posts: 2466
Joined: 12/7/2001
From: MT Vernon, WA, USA
Status: offline
HAW!


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Best to you all,
Mike
In memorium
Art Grabow Sr. AKA Grnbrt..RIP mah Brother

(in reply to William Robison)
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RE: Damage proof propellors - 4/16/2006 9:58:27 PM   
wcmorrison



Posts: 774
Joined: 10/2/2002
From: Weatherford, TX, USA
Status: offline
I'm still shoveling, there's got to be a pony in there somewhere with all the stuff on the floor.

Cheers,

Chip

(in reply to Mike Bogh)
       Post #: 5

RE: Damage proof propellors - 4/16/2006 10:08:33 PM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline
Chip:

Pony hell! It's a herd of cattle, and they are all bulls. Leaving of course, the expected fecal residue.

Haw.

Bill.


< Message edited by William Robison -- 4/16/2006 10:10:26 PM >


_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to wcmorrison)
       Post #: 6

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