Litespeed

A good trick to help quieten a turbo system is the plumbing of the blow off valve back into the exhaust flow just aft of the turbo. It can be more efficient and a lot quieter- most systems are designed just to dump the excess and costs power and noise-mainly noise. Systems set up like street machines are not what you need. They make great power part of the time but come at huge fuel cost and weight. Overall- it should be remembered it all comes down to physics - we can not create energy , we can only transform it into heat, motion and sound. The trick is to reduce the losses of heat and sound and maximise motion. Some are horribly inefficient and loud. Every reduction in sound if down correctly will help boost power or reduce consumption, if the system is designed right. It is a science and black art combined.

If money and sense was no object............. A Risen- very sexy, fast and a real smooth skinned beauty, Mmmmmmmmmmm

Just to keep you fellows up to date with the latest training scheme. It has been endorsed by the Minister Max Payne as a breakthrough that will equip our pilots for the new F35. enjoy

Yep the later /7 r series motors are great. Mine was a r100cs, it was a factory custom picked up from the factory itself. Basically a R100rs motor with added light flywheel, wire wheels, 40mm Delorto pumpers, and bigger forks, luftmiester triple clamp and beautiful handstriped paintwork. It was a absolute ripper and scared many a Ducati and Guzzi. Unfortunately these models now are very collectable and all the rage for cafe racers- BMW is now one of the biggest brands for modded old machines. As such prices are ridiculous- it is easy to pay $8,000 for one that needs lots of work and was only $1,000 a few years ago as a box of bits. Bloody BMW- how dare they become cool. Must form hunting parties for Hipsters and free the BMW's from the tryanny of stupid beards and earings.

BEx, I was assuming you go right through the engine and tidy everthing up, nice flow job, coated heads/pistons/exhaust etc and maybe better pistons. Since it is so cheap to do I see it as worthwhile to out the best engine in- might as well have more reliability bit more power and smoothness.

My bro has one of these engines in his chinese copy of a Russian copy of a WW2 BMW it is a Chiang ? I wish they actually had 45hp, the better version is more like 32hp on a really really good day. But his does have reverse gear which can be fun, was designed for a sidecar. The brakes are best described as a optimists folly- big drums and better to carry a anchor to thrown out. Top speed is about 100kmh but at least it sounds mean enough to get a clear road- the traffic parts for you. Before you think about it Bex...............no it would not be a good motor for a aircraft.

Certainly some companies can put marketing above engineering and have been guilty of failing to look properly before leaping. And some have been down right piss poor with customers and reliability, others just ravage your hip pocket but we accept it as normal. Then some are actually worth the bucks, but there is the rub which one? If you can get a rebuilt or low hour rotax cheap enough then sure hard to beat until it is many hrs later and the rebuild cost looms. But then you just get another rotax etc.... The actual engine part of a rebuild for many a non rotax engine could be only $2000 plus labour and that is a huge difference for do we not seek low cost? That is why we seek alternatives and for the fun, difference, power......

I am hard of hearing but thought someone said- where is the real motors for real hp and speed, Not that grandpa grey hair stuff............ Keep your shirt on whippersnappers........... This would be even better with a turbo or small supercharger to drop the revs and boost power. Sure looks damn sexy in that sultry carbon Cruise is 173 mph and it only weighs ................704 lbs empty ..................................................................................................................................................... I do think It could do with more grunt though- so the BMW 1600 cc 6 cylinder with turbo and intercoolers with 250-300 hp should suffice at much nicer revs and smooths as you like.

A R1100 motor in Rusia on a trike; nice install and note how well it just sits at exactly the set 3,900 rpm. Smooth.https://www.youtube.com/watch?v=whSTUQgvj04

And here is a R 1100 motor- so late gen injected oil/air cooled 85hp at 6, 800 rpm and 78kg as a package. Re-drive is via big wide belthttps://www.youtube.com/watch?v=D3dAF6Ozp4Q

more of the old school motor short vid sounds like no fuel bar the float bowls- but nice.

And now with some shiny stuff:drool:

More Guzzi the better, I have loved many and my Mk3 le mans modded to be usable and comfortable was a beast that could not be killed. The engine was over 200,000k and the problem- bloody rear main seal leaking onto the big dry clutch plates. Mind you I did have a dyna sealed electronic ignition and as new Delorto pumpers- reliable was a understatement. Brought up to BMW standard for electrics , carbs etc and they are fantastic. I remember the absolutely massive main rear bearing for the crank been a huge machining in the back of the crankcase- the case was one piece so you had a big tunnel for the crank to come through. This bearing at 200,000 hard kms looked like new- bellissimo

What was that? Oh- you want a real aircraft. None of that modern computer crap, a real machine of metal, cloth and a red blooded pilot. Yumm Needs a louder exhaust but sounds great, big prop, redrive and not a Vw or rotax. A more grunty sound. That is a late model 70's-90's r100 series engine 970cc old school aircooled with oil cooler and electronic ignition but can be points for the absolute hard core luddites. Carbs are bings and simple with CV diaphrams. Normal power for this type is 70hp max and a easy 60 cruise hp for long distance.

Here are some vids of BMW twin conversions. Note how small some are packaged and others just spread out to fill space. Some are much nicer than others.https://www.youtube.com/watch?v=5uqDwSDfZuohttps://www.youtube.com/watch?v=Ux83iZag5Y0

Following from the Viking Thread we started talking about BMW engines again- I should say I butted in with them............. So I figured it best to start a new thread for all things BMW engined that can relate to aviation. So it can include any BMW motor but as long as it can be aircraft powering- V12's included but I am mainly thinking the motorcycle twins and possibly the 4 and 6 cylinder bike engines. Essentially engines that could relate to RAA aircraft or even experimental light aircraft. Anything is basically welcome vids, pics, opinions, designs, outrageous ideas are very welcome. As long as it relates a BMW powerplant and aircraft you will be sweet. Naturally practical applications will also be happily digested.

Any idea on pricing when it comes out? I do like them though been a lover of v twin bikes. As long as it is more Moto Guzzi rather than Ducati, it could be great. I really love the compact installation it makes- just bolt up and connect fuel and electrics. Also what I love about BMW twin conversion done well.

I do not know why some have problems esp with the twin. There is nothing actually difficult as long as you wire it correctly- different models have different ecu set ups and some models need a standalone harness, dependant on model some will benefit for ease of conversion with a simple aftermarket ecu add on. Any problems are purely to do with the electronic side- the engines are beautifully made and engineered, they are excellent candidates but some seem to do silly things wiring/install wise. I think peeps just approach them wrong and patch up the system rather than do it right from the start. They get problems and fail to develop for a reliable system. If you can't get a two plug per cylinder twin with quality injection systems running smooth then the problem is not the engine but the install. Even with a complete standalone ecu and back up one- it is not a very big project or expense. The engine is ready to go- just give it the right ecu set up whether original or new- depends on model size and power output. You can have anywhere from 80-130hp and they really sip fuel when run correctly. Just like any conversion the install is where it counts. If you get the mounting,cooling,exhaust and wiring right then success follows. If you expect it to be a out of the box firewall forward install- then you pay for it. I do not know the current market that well, but bet a competitive brand new version could be done and all properly engineered for a Rotax price if not quite lower. All that is needed is a new lower case for the new 125hp twins to save a lot of weight and more aero like. The fundamentals of the engines are fantastic and include balance shafts. They are considerably less complex and more easily maintained/rebuilt than the rotax. Now that would put a cat amongst the pigeons As far as a reused motor, I doubt you could spend more than $8-10k building a excellent fwd if you are smart about it. And 125hp with redrive is a potent machine. Even if you enlist the help of a ECU specialist with dyno- the time and cost should not be huge. And add a tablet and you can have full spectrum real time engine management at your fingertips in flight. Now we are talking a new millennium engine and all the goodies that entails.But with bugger all price. I think a lot of failures have been losing motivation and making mistakes that are really simple in most cases.

Here is the only K BMW motor I could find already done- should make a fast sonex. Note the strange set up used- redrive is at rear of motor and goes over the top of engine. This is not needed but his choice. Here is comment from site SkyoteLog: May 2016 Here is Les Kanna's gorgeous BMW K-1200 motorcycle engine powered Onex. The BMW provides 100+hp in a plane which normally flies with 80hp. The bottom cowl has been removed which gives us a peek at the engine This is a real hot rod which flew for the first time this spring. This is way out on the end of the experimental limb of sport aviation. This is the only installation of this engine that we are aware of. It now has over 40 hours and all of the landings have been at the intended destination! So far, so good. Silky smooth! Did I mention fast? [GALLERY=media, 3575]Images by Litespeed posted Oct 2, 2015 at 8:21 PM[/GALLERY][GALLERY=media, 3575]Images by Litespeed posted Oct 2, 2015 at 8:21 PM[/GALLERY]

The Aeromomentum Engines are brand new factory built engines not a recycled one- so makes a good price point for all new. All of them look pretty good but I think I would probably either stick to a 2nd jabiru or by a redrive and do the same as above. As a different slant to look at would be this- use a K1200rs motor from BMW bike- 1200 cc 130hp, big flattish torque curve, mega reliable, already injected and a car style/rotax like redrive will bolt straight on. The motor is already on its side and very compact, very easy to work on and a brick reputation. A motor would be from $1000-$2000 for a real good one. I know these are not common due to weight over the twin but when compared to a car motor they can make a lot of sense. OR just do a BMW twin and be happy. Just a thought

A ppl maybe, but this is a RAA reg aircraft and thus is a Pilots certificate not licence. So I expect the rules are different maybe?

Does it not matter from a CASA and RAA point of view that he is in fact a employee of hers directly? But that is a mere mosquito buzzing around- it is the big angry elephant in the room they should be worried about.

As a aside what is the cost of building a nice hangar- nothing flash but with mezzainine level and concrete floor? I assume country prices not rip city ones. And can you make accomodation and live in the hangar or must it be a separate house? Big questions for cheapskate like me. Thanks in advance

I think the whole episode will have much more packed into the cannon before Ashby and Hansen stumble past and blow themselves up as they cry of Fake News. I have popcorn and beer.............

And that worked real well didn't- oh the irony, gaming the system to remove opposition- only to end of with even more of them. The LNP could only have done better by shooting themselves in the Head. Now that would make good TV. It could be filmed by Jabiru.......