Search results for query: *

The surface area is huge, the compression ratio is low, and the amount of pumping working is increased. It is more complicated and expensive to produce.

I usually get the best performance from multiple processors by running multiple load or geometry cases simultaneously. Each instance of Nastran runs on one processor. The other advantage with multiple processors is that you can run one load case and still have processing power for drafting...

I've seen plenty of harmonic balancers on 4 bangers. I think the reasons for leaving them off is economics, and the fact that in econo-boxs no one minds a little extra vibration.

Why do you want one exhaust system to work over such a wide range of displacements and powers? It seems that the system would be too big for the little engines and too little for the big engines? As for back pressure, the engine was designed to work with a certain level of back pressure. If...

Finding the stress concentration factor for a crankshaft in bending is a complicated problem. Fortunately it is also a well studied one. Unfortunately most of the research was done in the 1930's and the books detailing it are long out of print. If you spend some time looking around you local...

Are the 4:10 gears factory installed or aftermarket. It may be that GM reprograms the ECM for less peak torque, and less peak power, with the lower gears installed. However, if you take a car with 3.42 gears, pull them out, and install 4.10 gears, you will not effect rwhp. Rear wheel torque...

Previously Noran used Femap from UGS for there pre and post processor. Noran sold there own solver, NEiNastran, while UGS sold NX Nastran. Currently Noran is in charge of marketing, selling and supporting NX Nastran. See their newsletter from last April...

What happens when you drop the rbe2 element and just apply the load to a node, point or edge? Also, I believe your rigid element must be rigid in the 2 direction if you want to it to transfer your force in the 2 direction.

If you are using the same mesh for both, it is relatively straightforward. If you're using Femap to set up the problem, go to model, loads, load from output.

Yes, the newer versions of NEi Nastran (I'm assuming that is what you are using) allow for mesh discontinuity between contact surfaces.

I wouldn't answer your efficiency question. It depends on too many factors. Speed you drive, BSFC vs. speed and load of the engine, when you shift transmission gears, etc. However, the 10 less rwhp is almost certainly an effect of bad dyno operation (miscalculation by the operator) and not a...

What sort of test are you looking to have done?

tripleZ, Maintenance on the Buells is simple enough. It's a Harley engine is a simple chassis. Compared to a 600 they're much easier. Parts shouldn't be too hard to come by. They new ones are VERY reliable. Unfortunatly, they are not good motorcycles. Their fuel injection is off, the...

I've seen english keys on metric parts. I also see quite a few NPT pipe threads and UNC threads on metric parts, the english threads are for machine shop handling. However, any supply house (McMaster, Fastenal, MSC, etc.) carries metric keys. If you're going with a metric shaft diameter, I'd...

Needs boost to run, otherwise no intake stroke. Contact stress is not your friend.

I've heard of several MotoGP and other race teams trying what you are suggesting. The main problem they have is with the rider. It is easier for the rider to adapt to engine brakeing or a slipper clutch that to the inconsitant engine braking the servo controlled butterflies produce.

If you want front brake, hit the front brake, if you want back brake, hit the back brake. Linked brakes seem like a complicated solution to a problem that can be solved by squeezing the right lever a little harder.

An awful lot of those bikes have been modified and have new drive shafts on them, what are other people using?

I shouldn't say special oil for wet clutches. Just different oil. In a dry clutch bike any automotive grade oil will do just fine. In a wet clutch bike the friction modifiers make the clutch slip more than it should so you need motorcycle specific oil without the additives.

Ducati, BMW and Moto Guzzi all use them. They work well, but are easier to abuse than wet clutches. Wet clutches require special oil and have parasitic loses.