Posted April 7, 201113 yr which would be better for weight distribution and delivering the power a mid mounted w16 OR front mounted v8 and rear mounted v8
April 7, 201113 yr A front middle setup with a transaxle gearbox should offer a neutral weight distribution with a light tendence to the front. A Middle rear setup with a gearbox behind the rear axle should offer a neutral weight distribution with a light tendence to the back. A rear Engine like a Porsche 911, with the Gearbox in front of the rear axle, have many weight on the Back.
April 7, 201113 yr Author A front middle setup with a transaxle gearbox should offer a neutral weight distribution with a light tendence to the front. A Middle rear setup with a gearbox behind the rear axle should offer a neutral weight distribution with a light tendence to the back. A rear Engine like a Porsche 911, with the Gearbox in front of the rear axle, have many weight on the Back. i was thinking having the gearbox in the middle and a v8 either side , is this a good idea?
April 7, 201113 yr do you want build this Setup? Front axle -> enigne -> Gearbox -> Cardan shaft -> Differential This is a classical setup and good for a light back of the car
April 7, 201113 yr Author do you want build this Setup? Front axle -> enigne -> Gearbox -> Cardan shaft -> Differential This is a classical setup and good for a light back of the car front axle + differential -> front engine -> gearbox -> rear engine -> rear axle + differential it could also be powered oppositley since its 4 wheel drive so front axle + differential <- front engine <- gearbox <- rear engine <- rear axle + differential or independently front axle + differential <- front engine <- gearbox -> rear engine -> rear axle + differential the front set of parts can drive the rear set and vice versa and if i select the gear which disconnects the 4wheel drive they can be independent. Edited April 7, 201113 yr by SNIPE
April 7, 201113 yr A two engine Setup with one Gearbox? Sorry i think this is a insane idea. A middle rear W16 setup with all wheel drive is imho better
April 7, 201113 yr Author A two engine Setup with one Gearbox? Sorry i think this is a insane idea. A middle rear W16 setup with all wheel drive is imho better ive seen an audi TT with 2 v6 engines one at the front and one at the back
April 7, 201113 yr Me too, but this TT have two Engines with separate Gearboxes. The basic TT have Front wheel drive. The tuners have used two from this front engines with gearbox and have get a All wheel drive. this setup can make sense
April 7, 201113 yr which would be better for weight distribution and delivering the power a mid mounted w16 OR front mounted v8 and rear mounted v8 Best way is to make 2 V8 transversal and 5F+R transmission form 8448 set longitudinal and only rear wheel drive like on this car http://www.supercars.net/cars/390.html at least It was my project few years ago... good luck
April 7, 201113 yr Author Me too, but this TT have two Engines with separate Gearboxes. The basic TT have Front wheel drive. The tuners have used two from this front engines with gearbox and have get a All wheel drive. this setup can make sense my gearbox can control both engines interdependently so i don't think having 2 gearboxes is necessary imagine having 1 engine in 1st gear and the other in second gear well my gearbox can do this because of the splitter control which lets the axles that come out of both ends of the gearbox and join into the two differentials spin independently (at different speeds) also the gears don't actually do much in my model as they are the same size (like on the other Lego supercars like the 8448) this is basicaly how a variable center differential works because the faster the engine and wheels spin the more power is outputted if the VCD is set to a high power output limit of say 50% to the front wheels and 50% to the back Edited April 7, 201113 yr by SNIPE
April 8, 201113 yr If it were real life I would go front engine------------>diff<----------------rear engine ........................................I............................. ....................................gearbox.......................... ........................................I............................. front axle<--------------diff----------------->rear axle (plus diff)...............................................(plus diff) Seems like perfect weight distribution to me, and insanely powerful. I like it! Edited April 8, 201113 yr by allanp
April 11, 201113 yr Author If it were real life I would go front engine------------>diff<----------------rear engine ........................................I............................. ....................................gearbox.......................... ........................................I............................. front axle<--------------diff----------------->rear axle (plus diff)...............................................(plus diff) Seems like perfect weight distribution to me, and insanely powerful. I like it! i don't understand this diagram
April 12, 201113 yr i don't understand this diagram To explain the diagram: There is an engine at the front, and an engine at the rear. The outputs of these engines go into a differential. The differential accepts inputs from the two engines (which can be going at different speeds), and combines these to provide a single output. The output of the differential goes into a gearbox. The output of the gearbox then goes into another differential, but this time a single input is split into two outputs, one going to the front axle, the other going to the rear axle. At each axle (front and rear), the input is again split in two (using more differentials), so that you finally have four outputs, one going to each of the four wheels. Does that help...?
April 12, 201113 yr Author what about this way:                                                          gearbox                                                           |      |                                                            v     v front diff <- front engine <- clutch <- center diff -> clutch ->rear engine -> rear diff [The gearbox powers the center diff the center diff has two output shafts one we send to the front of the car the other to the back at the front of the car the center diff output shaft is the input shaft for the front diff the other output shaft of the center diff is the input shaft for the rear diff one clutch is in-between the two engines and the other is in-between the gearbox and rear engine (the other side of the engine not the end where the other clutch is)] the '|' and 'v' is a downwards pointing arrow. Edited April 17, 201113 yr by SNIPE
April 12, 201113 yr Author actually no these is even better (the diagram shows where the power travels to in the car http://pastebin.com/bXUe0XsK i just need to figure out where to put the parts so far its front diff -> gearbox -> center diff -> rear differential but i need to add the clutches and engines alough it says front and rear im going to try and put them both in the middle but if i cant then one will be on the front one will be in the back. Edited April 12, 201113 yr by SNIPE
April 13, 201113 yr Hi Snipe. Just so I understand better, when you mention 'engine', are you referring to: a real engine that provides power to the system (eg. a PF M or XL motor), or a 'fake' engine (eg. the Technic cylinders and pistons) that just look like an engine, but don't provide power (power is to be provided by another source, such as turning the the wheels or a PF motor located somewhere else in the drive-train)? You have to think about your inputs and outputs for each element in your drive-train. A PF motor has no (mechanical) input, and one output. A 'fake' engine has one input, and zero or one output. A gearbox (which includes any gears in the drive-train) has one input, and one or more outputs. A Lego clutch has either one input and one or two outputs (but only one output at a time), or two inputs and one output (but only one input at a time). A differential has either one input and two outputs, or two inputs and one output. A wheel has one input and no outputs. The simplest drive-train would be to have one motor, which has one output, and this output goes to the input of a wheel (that is, the motor is connected directly to the wheel). The one output of the motor goes to the one input of the wheel. Obviously you are after something a bit more complex than that, but you have to keep your inputs and outputs in mind while designing your drive-train. In your last diagram on this page (not the PasteBin one), your gearbox doesn't have any inputs, so I'm not sure how you expect this to work. A gearbox needs an input. In your PasteBin diagram, this should work if the engines are 'fake' engines, but I'm not sure why you have the clutches in there. If the engines are real engines (ie. PF motors), then the difference in speed between the motors (and there is always a difference in speed) might cause some problems, and you would be better off using a differential between the two motors as indicated in allanp's diagram. Once you have your drive-train sorted, you just have to be careful of torque in the system, otherwise you could destroy gears, stall motors, and/or rip your frame apart. Edited April 13, 201113 yr by Splat
April 13, 201113 yr Author the clutches are so you can change from 4 wheel or 2 wheel drive, which cuts one engine the engines are fake as in pistons etc can somebody help me visualize how it will be placed the car? (what goes where) Edited April 13, 201113 yr by SNIPE
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