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AttentionSpanner

[HELP] FWD with Transversely Mounted Engine and Gearbox

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Hi everyone, 

This will be my first project in a while, and my first project here. I want to try and make a 2WD (hopefully FWD, but RWD is fine if things get difficult), 4-cylinder car with a transversely mounted engine and gearbox assembly, and hopefully as a studless construction. I started mocking-up some of the gearbox in LDD (I know, not the best tool), and the results have not been too encouraging (space-wise).   I haven't yet figured how to post photos, but I will when I do

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Posted (edited)

You might wanna check out my current WIP, it has FWD, transversally mounted L4 engine and 5+R gearbox in front. Might not be exactly what you are aiming for (gearbox is not transverse), but it could help you getting started:

Space is always an issue with gearboxes in LEGO, but there is a solution for everything...

Edited by Rudivdk

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Posted (edited)

I can't really help you with your gearbox, but I can help you with this:

1 hour ago, AttentionSpanner said:

I haven't yet figured how to post photos

If you already have the photos on a file hosting site (Bricksafe is great for this), then it's just a matter of copy/ paste the URL of the photo - just make sure you resize it to meet the guidelines (800px wide).

Edited by mocbuild101

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On 8/21/2017 at 6:12 PM, Rudivdk said:

You might wanna check out my current WIP, it has FWD, transversally mounted L4 engine and 5+R gearbox in front. Might not be exactly what you are aiming for (gearbox is not transverse), but it could help you getting started:

Space is always an issue with gearboxes in LEGO, but there is a solution for everything...

Hi Rudivdk, 

Your family car looks great! Sometimes I'm glad people decide to stay away from the typical supercar layouts, with front/mid longitudinally mounted V8s and RWD/4WD. I am only now starting to understand that proper FWD is very difficult to achieve, however... Funnily enough, I was considering using Sheepo's McPherson as well, but for an FF layout I didn't know whether it would be the best... Ideally I'd want a 3L differential with the 16t spur gear instead of the 28t bevel (maybe that's for another thread, though). The other option would be to make everything as a studded construction (another possibility). I will try to post some pictures so you can get an idea of what my idea was. 

 

http://bricksafe.com/pages/AttentionSpanner/fwd-setup FWD%20setup%2010.png

I'll try to find some way to include the selector assembly, as, up to this point, I haven't come up with any  great ideas. Also, I'd like to make everything a little more compact, and find a good place for the I4 fake engine, but the main issue would be the gear selector assembly. Now, I remember that someone had made a nice 8856 replica in studless without flex cables (which would be nice, but am trying to avoid for the gearbox), and I also remember Nathanael's Predator Supercar, with the great gearbox linkage, except I am not sure if it is going to work here, since the gearbox is both transverse and shifted on the vertical axis. Since I don't have the parts to build this in real life, this will involve a bit of trial and error, or might not even end up anywhere. So, feel free to try this out or even build something of a similar principal out of what you have, if you want to.

Any suggestions for improvements are more than welcome.

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15 minutes ago, AttentionSpanner said:

FWD%20setup%2010.png

You should at least secure (form-lock) the red assembly on top to the present frames with a vertically oriented beam or frame. This way the springs are likely to push that assembly off of the pins it is connected to.

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Just now, Didumos69 said:

You should at least secure (form-lock) the red assembly on top to the present frames with a vertically oriented beam or frame. This way the springs are likely to push that assembly off of the pins it is connected to.

Hi Didymos69!!! Thanks for taking the time to comment, it's truly an honor to have you here!!!

Yes, I haven't included everything in LDD yet, as it can get to be a bit of a struggle (I hate the program, but that's the only one I'm familiar enough with to use). I would be assuming 4 1x3 liftarms either side of the 5x11 frame connecting it to the top beam / strut tower bar would work.

Only issues I'm starting to get worried about are that I won't have too much room to mount the engine in between the strut towers without going up to a huge scale (I'm OK with using the 68.8x36 ZR wheels, but I'm dreaming of having the more-realistically-sized 62.4x20 combo (I said "dreaming" for a reason there...)). However, I won't know for sure until I build it, and, well, I don't even have the pieces (or the time) for that at this moment. I'll try to keep adding any new progress on the BrickSafe folder. I'll see what I can come up with considering your advice.

Again, thank you for offering some advice on this. I haven't even started, and the issue "realistic FWD" already seems scary... 

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Ok, I've just uploaded the latest LDD on Bricksafe, just realized I could do that, should have tried it earlier... Anyway.. :laugh: :grin: :cry_happy:  Again, I do not know how often this thread will be updated, but you (yes, YOU) are welcome to experiment on the file with LDD, or even other programs I guess. The idea is to find a way to eventually make this a reasonably practical setup for use in MOCs (that's my vision for it, anyway)...

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