2014-2020 Formula One 1.6l V6 turbo engine formula

[simieski]

Apologies if this has been posted before. Was looking up about turbo failure and containment, came across this by Garret (Honeywell), seemed quite informative.

http://www.turbobygarrett.com/turbobyga ... inment.pdf

Additionally, Honeywell patent with details of ballistic shielding techniques.

http://www.google.com/patents/US7478532

[321apex]

Apologies if this has been posted before. Was looking up about turbo failure and containment, came across this by Garret (Honeywell), seemed quite informative.

http://www.turbobygarrett.com/turbobyga ... inment.pdf

Additionally, Honeywell patent with details of ballistic shielding techniques.

http://www.google.com/patents/US7478532

Ceramics have been adopted as material for turbine wheels. When a ceramic turbine wheel bursts, it just turns into powder making it nearly harmless than a metal turbine wheel coming apart.

I was expecting that in the F1 case, the ceramics will be used inside the turbo, due to lighter mass, increased safety and no cost pressure.

[In the past, there was a brief discussion on the subject here - http://www.f1technical.net/forum/viewto ... 3&start=45 ]

[ringo]

Ceramics.. what are the cons?
With modern alloying technology, I think a special alloy wheel could be advantageous.

[Lycoming]

The main con is that ceramics are still very brittle. Jet engine turbines are still inconel. Not quite the same as the turbine on a turbo, but still quite similar.

[321apex]

The main con is that ceramics are still very brittle. Jet engine turbines are still inconel. Not quite the same as the turbine on a turbo, but still quite similar.

Jet engines are much different than road engines. An aircraft doesn't stop on the side of the road when something inside an breaks down. It usually crashes and people may die. So incanel turbine blades have a solid place there.

This year F1 makes turbine explosion particularly dangerous for following cars due to rules prescribed exhaust pipe exit straight back from turbo. As such, the ceramic turbine wheel would go in some ways to increase the safety margin in risky situation.

http://www.jsae.or.jp/autotech/data_e/12-5e.html

https://www.memsnet.org/material/siliconcarbidesicbulk/

Ceramics are brittle, however this application is not new for silicon carbide and since it was used by Nissan in OEM application, the technology is mature to be used in motorsports if rules permit it. Density comparison:
- inconel - 8.4 g/cm^3
- SiC - 3.2 g/cm^3

Clearly, the reduced rotating inertia for turbo lag related characteristics is favorable, as well as the burst energy aspect that must be contained. On top of that , when such ceramic part fails and bursts, it rather pulverizes into much less harmful powder than tough inconel blades.

[Tommy Cookers]

Silicon Nitride surely ?

[321apex]

Silicon Nitride surely ?

You are correct, I meant SiN. Density is similar to SiC.

[wuzak]

This year F1 makes turbine explosion particularly dangerous for following cars due to rules prescribed exhaust pipe exit straight back from turbo. As such, the ceramic turbine wheel would go in some ways to increase the safety margin in risky situation.

Since the blades, if they failed, would fail radially there is little or no axial component to their energy. If they did come out the exhaust they would pose no more risk than other bits falling off cars. Like springs, for instance.'

Ceramics are brittle, however this application is not new for silicon carbide and since it was used by Nissan in OEM application, the technology is mature to be used in motorsports if rules permit it. Density comparison:
- inconel - 8.4 g/cm^3
- SiC - 3.2 g/cm^3

And how strong is this material?

[Lazy]

This year F1 makes turbine explosion particularly dangerous for following cars due to rules prescribed exhaust pipe exit straight back from turbo. As such, the ceramic turbine wheel would go in some ways to increase the safety margin in risky situation.

Since the blades, if they failed, would fail radially there is little or no axial component to their energy. If they did come out the exhaust they would pose no more risk than other bits falling off cars. Like springs, for instance.'

Ceramics are brittle, however this application is not new for silicon carbide and since it was used by Nissan in OEM application, the technology is mature to be used in motorsports if rules permit it. Density comparison:
- inconel - 8.4 g/cm^3
- SiC - 3.2 g/cm^3

And how strong is this material?

So pretty dangerous then.

[321apex]

And how strong is this material?

At room temp, inconel is about 7 times stronger than Silicon Nitride (Si3N4). However at 900 deg C the strength properties are comparable, while SiN is 2.6 times lighter, or moment of inertia (kinetic energy) is nearly 7 times less.

http://www.memsnet.org/material/siliconnitridesi3n4/

http://www.google.pl/url?sa=t&rct=j&q=& ... 8216,d.ZGU

Certainly there is potential of functional gains in performance and safety.

[Per]

Quick question: when media report track statistics and talk about "percentage full throttle" of for example 60%, do they refer to % distance or % laptime?

[WhiteBlue]

usually laptime

[R_Redding]

I was expecting that in the F1 case, the ceramics will be used inside the turbo, due to lighter mass, increased safety and no cost pressure.

Ceramics in the PU (except for electrical insulators and heat sheilding) are pretty much banned by Rules 5.16.1-h ....
And 5.18.2 specifically for the compressor,limiting the choice to Aluminium,Titanium and Iron based alloys.

Rob

[LookBackTime]

Mercedes - Up Close and Personal with the Formula One Power Unit

[Tommy Cookers]

for months I have been predicting that one bank will have a longer exhaust pipe than the other (and feel vindicated in this ?)

but I can't see what the crankshaft looks like, please can someone with better eyes and brain and IT competence help out here ?