Titanium Propellers- Please help - Page 3 - PeachParts Mercedes-Benz Forum

Chas H · #31 11-09-2008, 10:56 PM

Quote:

Originally Posted by Brian Carlton

I touched down the starboard prop on one of the ferries just briefly..........in sand...........on a Saturday afternoon (weekends are the heaviest).

It folded the very tip on one of the four blades. The wheel is all brass..........very soft..........and it takes nothing to damage it.

Hauling the 75' boat in the middle of the parking lot on Sunday morning and changing the 34" wheel was definitely not what the mechanic wanted to do that morning. But, by noon, the boat was back in the water for the Sunday afternoon rush hour (actually 5 hours stretching from 4:00 to 9:00).

A lot of owners dive to change a prop rather than pull the boat.

iwrock · #32 11-09-2008, 11:05 PM

IIRC, my parents run an aluminum props on their Sea Ray. Worried about breaking stuff when hitting something.

I seem to remember my dad telling a story about one of his friends running a stainless prop, hitting something, and destroying the u joint and gimbal bearing.

Brian Carlton · #33 11-09-2008, 11:07 PM

Quote:

Originally Posted by Chas H

A lot of owners dive to change a prop rather than pull the boat.

Zero visibility and a weight of 225 lb. for the wheel..........and the requirement to heat the hub to remove it..........make this an undesirable option for a ferry.

iwrock · #34 11-09-2008, 11:13 PM

Quote:

Originally Posted by Brian Carlton

Zero visibility and a weight of 225 lb. for the wheel..........and the requirement to heat the hub to remove it..........make this an undesirable option for a ferry.

You operate ferrys now? I though you did custom CnC work...

Brian Carlton · #35 11-09-2008, 11:19 PM

Quote:

Originally Posted by iwrock

You operate ferrys now? I though you did custom CnC work...

I still run a charter boat on occasion. The ferries demand too much time out of the weekend.

The custom balancing tooling for jet engines is the primary business.

WVOtoGO · #36 11-09-2008, 11:27 PM

Quote:

Originally Posted by Brian Carlton

I can drink till I can't see...........let go of the controls..........and the ferry will just continue straight ahead...........if I pull the power back to idle...........the ferry just stops and sits there...........I can pour more drinks...........

I can drink till I can’t see....let go of the controls....and the helicopter will just continue straight into the ground....if I pull the power back to idle....the helicopter just drops like a rock....I probably wont drink any more....

Close enough -

- S

R Leo · #37 11-10-2008, 08:19 AM

Quote:

Originally Posted by Brian Carlton

CFAN is owned by GE and is the company devoted to those blades. Whether GE got the technology from CFAN or vice-versa.........I can't say.

Right after finishing college, I applied for an opening they had for an illustrator. I did a little research to find out what they were and IIRC, CFAN was a consortium formed by GE, Snecma and (maybe?) RR to explore cf use in aerospace engines. It has just been there so long I figured that by now, more than one type of engine would have carbon blades.

Blades aren't their only biz according to their site. They do ducting etc...

KarTek · #38 11-10-2008, 08:52 AM

Quote:

Originally Posted by WVOtoGO

I can drink till I can’t see....let go of the controls....and the helicopter will just continue straight into the ground....if I pull the power back to idle....the helicopter just drops like a rock....I probably wont drink any more....

Close enough -

- S

A helicopter is like a raging bull - always trying to destroy itself and everything around it. The pilot doesn't actually fly the thing, they just keep it distracted and carefully "herd" it around and keep it from doing any damage.

Dee8go · #39 11-10-2008, 09:50 AM

I heard someone say that some people are using titanium to make jewellery like wedding rings out of. If it's THAT precious, I would think it would be out of the question for ordinary air plane props.

Brian Carlton · #40 11-10-2008, 12:02 PM

Quote:

Originally Posted by Dee8go

I heard someone say that some people are using titanium to make jewellery like wedding rings out of. If it's THAT precious, I would think it would be out of the question for ordinary air plane props.

They do it for the color. It's a cross between silver and gold as far as color is concerned. It's not a precious metal. Jet engines use quite a bit of the material up in the front. It can't take any high temperatures so anything behind the fan and LP compressor can't be produced with titanium...........inconel then becomes dominant.

John Doe · #41 11-10-2008, 12:05 PM

Quote:

Originally Posted by Brian Carlton

They do it for the color.

I imagine a titanium wedding ring would be as light as a feather. I have a titanium bladed knife and hate it because it has no heft.

Sure ya'll aren't talking about platium? That is what our bands are made of.

PaulC · #42 11-10-2008, 12:07 PM

Quote:

Originally Posted by John Doe

I imagine a titanium wedding ring would be as light as a feather. I have a titanium bladed knife and hate it because it has no heft.

Sure ya'll aren't talking about platium? That is what our bands are made of.

I have a Breitling with a titanium case and band. It's my primary watch, as it's light enough that I can put it on and forget that I'm wearing it.

Brian Carlton · #43 11-10-2008, 12:11 PM

Quote:

Originally Posted by John Doe

I imagine a titanium wedding ring would be as light as a feather. I have a titanium bladed knife and hate it because it has no heft.

Sure ya'll aren't talking about platium? That is what our bands are made of.

Titanium has the strength of steel and the weight of aluminum. It's expensive to purchase and very expensive to machine.

Platinum is a precious metal.........more costly than gold IIRC. It's soft as hell, however.........useless for any tools or parts.

cmac2012 · #44 11-10-2008, 12:13 PM

Quote:

Originally Posted by Mistress

Just curious- Aside from cost, does anyone know why airplane propellers aren't made out of titanium?

Begging you pardon, Mistress. Did you just inherit some titanium mines? I'm perplexed as to why you would suddenly be concerned about a lack of good uses for titanium.

I've got some in my mouth.

cmac2012 · #45 11-10-2008, 12:15 PM

Quote:

Originally Posted by Brian Carlton

Titanium has the strength of steel and the weight of aluminum. It's expensive to purchase and very expensive to machine.

Apparently it has the curious property of being attractive to bone cells, attractive enough so that they will bond onto its surface rather than reject it.

Which is why it's good for artificial tooth roots.