A New Home for my Benz Engine

[ajoeiam]

Thank you Steve I hope it will be an acceptable version.

I added a 1" wide plate for the gas tank and throttle lever to mount to.
View attachment 149685

Mounted the hall sensor on the right side.
View attachment 149686

This is just a mock up of the drive belt to check the alignment of the pulleys.
View attachment 149687

Thanks for looking
Ray

Looking almost done (and very nice) - - - good on you mate!!

 

[Rdean33422]

Thanks ajoeiam but still a long way to go.


I turned the water inlet under the engine and tank fitting around as they were in conflict with the drive belt on that side.
Made up a new copper pipe to the water tank.


The carb wouldn't fit in its current position so I made up a brass 90.
Now that doesn't look like it should be that hard but my soldering skills have left me. Not enough practice.
I did get the job done on the third try.



Thanks for looking
Ray

 

[stevehuckss396]

Really enjoying this model Ray. Very different and some fine craftsmanship.

 

[Rdean33422]

Thank you Steve it is a lot different from just building an engine.

Ray

 

[Rdean33422]

I have been working on the seat as I plan on mounting the batteries and ignition module under it.
Took all day just to get it roughed out and make the mounting brackets.

Now I will clean it up some and paint the brackets.

Thanks for looking
Ray

 

[stevehuckss396]

If you get a chance put a coke can on the seat and take a photo so we can get a feel for how big it is.

 

[Rdean33422]

Steve I am sorry I forgot the can today but promise to get a picture tomorrow.

I added some rounded corners and smoothed over the top and then put a clear finish on the seat.


I cut the floor boards and checked for fit.
Looks like they will work out well.


They will be removed, sanded, stained, and sprayed with clear coat before final assembly.

Thanks for looking
Ray

 

[stevehuckss396]

No problem! When you get a chance. Looking like it should. I have started a few complete vehicals so I know what you are up against.

 

[Rdean33422]

The floor boards are sanded, stained and installed.


I also installed the off/on switch, the battery holder and the ignition module.


I didn't forget Steve a can of Coke to show the size of the model so far.

Thanks for looking
Ray

 

[stevehuckss396]

Thank you. It's a little bigger than I imagined but not by much. Wood work looks nice.

 

[Rdean33422]

Thanks Steve

I added a back rest to the seat for looks and drilled and tapped the two drive sprockets for set screws.


My friend Chris gave me a piece of used belting that he had replaced on his lathe. It was too wide but I was able to tear it length wise and the tear followed the fabric very nicely.


I used some Alligator splices to make up the ends. They were size 00 the smallest the factory made and just the right size for the Benz.
I left the belt quite long to act as a clutch for the engine.


I mounted the carb mixture valve where I could get to it easily.


I thought I should start the engine and work out any issues now rather than later. After a few minutes of hand cranking and a little cussing I have the engine running nicely like it was.
I have had some worries that the engine would not have enough power to pull the Benz and just bog down. The Benz weighs in at just under 25 pounds now so I gave it a try on the cement slab outside my shop. Now the drive belt is very loose and I didn't expect it move much as I would rather have had it just sit still. Well it took off at a rather quick pace without a noticeable drop in engine RPMs. I didn't have to run to catch up but I think it will be faster than I would like it to be.

Things left to do:
Make a proper clutch.
A steerable front wheel.
Maybe larger driven sprockets for the rear wheels to slow it down some.
A differential may still be needed for turning.

Thanks for looking
Ray

 

[Jojo]

You should be very proud of this model.
beautiful work!

 

[Rdean33422]

Thank you Jojo I'm trying.

I have the steering sorted out now on to the clutch.




Thanks for looking
Ray

 

[Rdean33422]

I have the clutch (belt tightener) built and installed. The lever works just backwards of the Benz with the lever back for forward drive.




When I moved the engine back 2 inches a while back I used two steel plates that were bolted to the two frame brackets.


I found that there was too much flex in the plates the way they were mounted and allowed the engine to buck up and down as it was running.
I replaced them with a single longer plate of 1/2" aluminum and that took care of that.


As I am working on the final details I have found the gear ratio is just too high. With the tightener engaged so the belt doesn't slip the engine can not pull the Benz. If it could it would be moving at a fast walking speed which is not acceptable.
I will be giving this some extra thought before I change anything.

Thanks for looking
Ray

 

[Rdean33422]

I have decided to change the big output pulley on the cam shaft to lower the speed. The original was 4" in diameter and the new pulley is 2.5" in diameter. That should make a big difference.


I had to make a shorter belt and a larger tightener roller and modify the roller bracket for the clutch to work.


Please excuse the video quality.
Have you ever tried to make a video by yourself while on the ground on all fours and then quickly get up and try to focus the camera. Then in the bright sunlight I couldn't see the view screen and just had to guess where the Benz was. Well it didn't turn out too badly so here it is.




I call this officially done.
Thanks to all that followed along.
Ray

 

[Sprocket]

You need to find a scale driver!
Otherwise very cool!
Doug

 

[Richard Roberts]

Thanks ajoeiam but still a long way to go.


I turned the water inlet under the engine and tank fitting around as they were in conflict with the drive belt on that side.
Made up a new copper pipe to the water tank.
View attachment 149710

The carb wouldn't fit in its current position so I made up a brass 90.
Now that doesn't look like it should be that hard but my soldering skills have left me. Not enough practice.
I did get the job done on the third try.
View attachment 149711


Thanks for looking
Ray

 

[Richard Roberts]

Benz engine
Hi
Does the horizontal flywheel run more smoothly than a vertical one?
You may have detailed this.
If so my apologies
Richard

 

[minh-thanh]

I have decided to change the big output pulley on the cam shaft to lower the speed. The original was 4" in diameter and the new pulley is 2.5" in diameter. That should make a big difference.
View attachment 149907

I had to make a shorter belt and a larger tightener roller and modify the roller bracket for the clutch to work.
View attachment 149908

Please excuse the video quality.
Have you ever tried to make a video by yourself while on the ground on all fours and then quickly get up and try to focus the camera. Then in the bright sunlight I couldn't see the view screen and just had to guess where the Benz was. Well it didn't turn out too badly so here it is.




I call this officially done.
Thanks to all that followed along.
Ray

I really like
Congratulations !

 

[Rdean33422]

Thank you Doug and Minh Thanh for the kind replys.

Richard I don't think the horizontal flywheel runs any smoother but it does make a twisting motion to the model when firing.