1/3rd Scale "Ball Hopper" Monitor Build

JB - That's good even by my standards. Seriously good! I thought the crankcase had oil in the bottom to lubricate big end etc?

Beautiful engine Jason, great work. Does it get hot enough running to need water in the hopper? JD

Thanks Chaps

Fizzy you are right the bottom end uses splash lubrication. I just added a few drops of oil to the big end for the test runs which were only a few minuits long as if it had needed a strip down things would be a lot cleaner. Once I got it running right there it was filled with oil, I also fitted the two plates that close in the open areas around the bearing caps and sealed with a small bead of clear silicon, again not something I wanted to remove if possible.

Jeff the longest I have let it run is about 5mins and by then it is starting to get about as warm as I would want it too so any longer runs would best be done with the hopper filled.

J

Jason

This is a long shot so to speak however, I am trying to source some information on the Baker Ball Hopper Monitor engine 1/3 scale. I tried to up load a photo of the engine however, I wasn't able to work out how.

The engine was purchased just over five years ago from someone who purchased it from the original builder long since gone. So the finished engine is approx fifteen years old.

A good friend of mine has given it to me to see if I can get it going - easier said than done. I have had it running for half an hour or so only to die and refused to restart. The engine run did highlight a few problems most of which can be fixed with a little care. My problem is the air intake and fuel mix. Just looking at what the original builder has done, just doesn't look right in the way he machined what could be called the venturi. What I am looking for is someone who has a set of plans and if they would take a photo or similar of that part of the drawing of the air intake venturi and fuel jet. I am trying to avoid re inventing the wheel so to speak.

If you can help, it would be very much appreciated.

Thanking you in advance

Bruce W-S

Ah that is the smaller VJ (vertical Jack) Monitor that you have there not the larger one on HMEM and that I built.

Luckily I also have the VJ and will dig out the drawing for you a bit later. It is a bit more basic than the larger engine but so was the original engine.

Edited By JasonB on 19/09/2023 10:10:58

Send me a private message with your e-mail a sthe files are a bit big to post here, you can do that by clicking "message member" at the bottom of this reply.

I'll also copy yhe details from the larger engine which has a separate venturi insert with double taper that went into the inlet hole which you could possibly add to the smaller engine.

Also make sure the non return valve on top of the fuel tank has not picked up so much from the tank and is allowing tehfuel to drain back when it is missing between hits