BMW engine aircraft suitable?

just read about the new BMW S 1000 RR bike. The complete engine assembly
is less than 60 KG. Engine puts out 193HP (112 Nm, 12,000rpm). Wouldn't
that one (slightly detuned) make a nice SLA powerplant ;-))

"Ralf Mueller" wrote in message
...
just read about the new BMW S 1000 RR bike. The complete engine
assembly
is less than 60 KG. Engine puts out 193HP (112 Nm, 12,000rpm).
Wouldn't
that one (slightly detuned) make a nice SLA powerplant ;-))

With about a 4.8/1 reduction to the prop??

--
We have met the enemy and he is us-- Pogo

Anyolmouse

"Anyolmouse" wrote in message
...

"Ralf Mueller" wrote in message
...
just read about the new BMW S 1000 RR bike. The complete engine
assembly
is less than 60 KG. Engine puts out 193HP (112 Nm, 12,000rpm).
Wouldn't
that one (slightly detuned) make a nice SLA powerplant ;-))

With about a 4.8/1 reduction to the prop??

--
We have met the enemy and he is us-- Pogo

Anyolmouse

What kind of TBO is expected @ 12,000 rpm?? Some guy who has been playing
with engines for quite awhile has a rule of thumb that says 4500 is a kind
of mark for piston engines beyond which the durability starts decreasing
more rapidly??? I haven't double checked this, but it makes some sense that
the faster the piston engine spends the quicker it wears. There is several
projects using the Yamaha 4stroke snowmobile engine that turns up around
12,000 for it's hp. Data should be available soon on their durability...

Stu Fields wrote:
"Anyolmouse" wrote in message
...
Anyolmouse

What kind of TBO is expected @ 12,000 rpm?? Some guy who has been playing
with engines for quite awhile has a rule of thumb that says 4500 is a kind
of mark for piston engines beyond which the durability starts decreasing
more rapidly??? I haven't double checked this, but it makes some sense that
the faster the piston engine spends the quicker it wears. There is several
projects using the Yamaha 4stroke snowmobile engine that turns up around
12,000 for it's hp. Data should be available soon on their durability...

true for cast-iron cylinder barrels, not true for diamond-like hard
modern coatings.

here's a pic of the engine:
http://www.ph21.de/guest/1000RR.jpeg

Stu Fields a écrit:

What kind of TBO is expected @ 12,000 rpm?? Some guy who has been
playing with engines for quite awhile has a rule of thumb that says
4500 is a kind of mark for piston engines beyond which the durability
starts decreasing more rapidly???

It's not the rpm but the piston speed which cause wear.
Bikes engines have very slow piston speed.
The challenge is the PSRU.

At this time, nobody built an alternate engine lighter than an
aircraft design engine.


--
une télé qui s'éteint et c'est un cerveau qui s'éveille
Philippe Vessaire Ò¿Ó¬

Philippe wrote:
....

At this time, nobody built an alternate engine lighter than an
aircraft design engine.


are you joking? 193 HP @ 60 Kg that is turbine land.....

"Ralf Mueller" wrote in message
...
just read about the new BMW S 1000 RR bike. The complete engine assembly
is less than 60 KG. Engine puts out 193HP (112 Nm, 12,000rpm). Wouldn't
that one (slightly detuned) make a nice SLA powerplant ;-))

193 HP ??? Are you positive about that number? I would like to see where
that number came from, if it is available on the net, if you wouldn't mind.

If it is correct, that should do rather nicely. People have flown BMW bike
engines in the past. I believe that most of the successful ones have used a
different gearbox to reduce the prop RPM. Seems to me that I remember that
they adapted a Rotax gearbox to the job, but I doubt that there are any
Rotax gearboxed that could handle 193 HP.
--
Jim in NC

On Nov 27, 3:54*am, Ralf Mueller wrote:
just read about the new BMW S 1000 RR bike. The complete engine assembly
is less than 60 KG. Engine puts out 193HP (112 Nm, 12,000rpm). Wouldn't
that one (slightly detuned) make a nice SLA powerplant ;-))

I'd make a great SLA powerplant - as would other 4-cyl motorcycle
engines.

To answer other posts in this thread:

How long would a 12,000 RPM engine last?
Longer than a Lycoming. These engines are bulletproof.

They get their amazing power-to-weight ratio by being a high revving
engine. Trying to get the same power from a slow revving engine would
cut engine life since the bearings would have to handle far higher
torque.

Yes, you would need approximately 5:1 gear reduction but that's well
within the range of a single stage planetary gear set. Would it last
at thst RPM? Why not? Motorcycles have gears.

Like all engine conversions, it's all in the details. Do the
engineering right and it'll work fine.

在 2009年11月27日星期五 UTC+8下�6:54:05，Ralf Mueller写�：
just read about the new BMW S 1000 RR bike. The complete engine assembly
is less than 60 KG. Engine puts out 193HP (112 Nm, 12,000rpm). Wouldn't
that one (slightly detuned) make a nice SLA powerplant ;-))

Sell:
China Shenzhen ZHAOWEI Machinery & Electronics Co. Ltd engages in designing, manufacturing and marketing all kinds of electric motors. They are mainly suitable for the following applications: smart home application used in smart kitchen and laundry, medical instrument for personal care, smart E-transmission applied in automobile, industry automation applied in telecommunication and a great variety of plastic/metal planetary gearbox in different sizes.
In order to develop the oversea market, we are current seeking new partners around the world to create a bright future together. ZhaoWei is a right choice and excellent partnership with sincere services.

Company: Shenzhen ZHAOWEI Machinery & Electronics Co., Ltd
URL: http://www.zwgearbox.com/
Contact: Anny Liu
Tel：+86-755-27322652
Fax：+86-755-27323949

Add: Blk. 18, Longwangmiao Industry Park, Fuyong Tn., Bao’an Dist., Shenzhen 518103, Guangdong, China

On Thu, 10 Sep 2015 02:29:12 -0700 (PDT), wrote:

? 2009?11?27???? UTC+8??6:54:05?Ralf Mueller???
just read about the new BMW S 1000 RR bike. The complete engine assembly
is less than 60 KG. Engine puts out 193HP (112 Nm, 12,000rpm). Wouldn't
that one (slightly detuned) make a nice SLA powerplant ;-))

Sell:
China Shenzhen ZHAOWEI Machinery & Electronics Co. Ltd engages in designing, manufacturing and marketing all kinds of electric motors. They are mainly suitable for the following applications: smart home application used in smart kitchen and laundry, medical instrument for personal care, smart E-transmission applied in automobile, industry automation applied in telecommunication and a great variety of plastic/metal planetary gearbox in different sizes.
In order to develop the oversea market, we are current seeking new partners around the world to create a bright future together. ZhaoWei is a right choice and excellent partnership with sincere services.

Company: Shenzhen ZHAOWEI Machinery & Electronics Co., Ltd
URL: http://www.zwgearbox.com/
Contact: Anny Liu
Tel?+86-755-27322652
Fax?+86-755-27323949

Add: Blk. 18, Longwangmiao Industry Park, Fuyong Tn., Bao’an Dist., Shenzhen 518103, Guangdong, China
Possibly, but what horsepower can it produce at 3000 RPM? And if that
is not enough, what reduction gear assembly do you want to use?

And yes, BWM horizontal twins HAVE been used on light aircraft, along
with Citreon twins.