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Hello, I am planning to built a model boiler for my PM research steam engines. I would not like to exceed working pressure of boiler more than 3 bars. I have gone through some plans on modelengineeringwebsite.com for the same. After seeing the plans I am confident that I can get all the...

Hi, W is crank throw; one half of stroke, H is Con rod length, L is the piston rod length. it is stroke + piston length + TDC clearance +BDC clearance + clearance between rod and gland. I am assuming this engine is similar to modern 2 stroke marine engine Regards Nikhil

Hi, You could think of incorporating an accumulator on the discharge side of the pump. The accumulator will smooth out/dampen the pressure pulse and will give almost continuous non pulsating flow. Regards Nikhil

Onboard an oil rig now in Persian gulf. Its summer here with temperature 45-48C and humidity in 30s. One time the temperature went to 53C in engine room. It was hell.

I had a similar problem with MEM website. First I signed up with my Indian Email address but they rejected it. Then I signed up with google address and I was allowed to join the site. But after few days I was banned from the site. Now they have banned my IP address too. I don't know why it...

Most of marine diesel engines are now dual fuel engines. Running on both oil or natural gas. Regards Nikhil

Hi, A ship or Rigs deck plating are never rigid. There is always some flexing, bending or twisting going on depending on sea condition or loading condition. The engines and propeller shaft are supported by additional strengthening frames to minimize this. Additionally there are always some...

Hi, I have a similiar lathe as yours. A Sieg C4B. I recently renewed all the bearings for this lathe. I also converted the lathe spindle to oil bath lubrication. Its an relatively easy mod to do. For seals I used generic oil seals that I got from Amazon. You can use these seals to keep the...

Hi, We recently got a new lathe installed on the oil rig where I work. The shipyard people just made a base of heavy angle plates and bolted the lathe to it. No checking of anything was done. Lathe was purchased only to fulfill some commercial requirements and to put a checkmark on some...

HI, The last time I run my lathe was about 1 month back. I made a backplate for my new 5" 4 jaw self centering chuck. The lathe was cutting the steel plate quite easily. DOC was about .3mm and rpm 200 if I remember correctly. Now after reading your post I have to plan and fix the lathe to...

Thanks, I will definetly try to contact him. regards Nikhil

Hi, This gentleman lives near to my place. I always wanted to meet him and learn from him. But I never was able to get his address or contact details. Regards Nikhil

You are in the process of making a beautiful traction engine. I am following this built from start. Inspired by you I have started to gather material for this built. I have made 2 of the PM research steam engines. The valve for those engines is not "fixed" to the spindle. Rather it is...

The displacer cylinder has to do two jobs at same time. 1. To transfer heat to the air inside it and 2. To avoid heat travelling to other cooler parts of the engine. These two jobs are totally contrary to each other. If you use glass tube which is insulator it does not do the first job...

Hello, Until recently I was using a granite countertop piece as a surface plate. I recently purchased a granite surface plate. Its a 0 grade plate 300 x 300 x 75mm size. I got it for around USD 50. It came with test certificate and the values were hand written. So I think they must be somewhat...

Yes. You are right. A geared system will give a greater torque range compared to belt system with fixed pulleys and variable speed motor. But I checked the lathe after your message. I can get a 1mm doc cut on a 25mm piece of aluminium at 60 rpm. At higher doc the belt starts to slip. So I think...

Hi, Here are Wikipedia links to various combustion cycle. You can also Google search them for more detailed information. Otto cycle https://en.m.wikipedia.org/wiki/Otto_cycle Diesel cycle https://en.m.wikipedia.org/wiki/Diesel_cycle Dual cycle https://en.m.wikipedia.org/wiki/Mixed/dual_cycle

Hi, Finally I was able to renew the spindle bearings for my C4 lathe. I used tapered roller bearing on both ends. 32007 and 30206. I also modified the headstock to have oil bath lubrication. Oil level is kept so that it comes to middle of lowest roller. I read about this somewhere on SKF site. I...

From my engineering perspective engine running on Otto cycle or similar ( combustion at constant volume) are petrol or gasoline engines while engine running on Diesel cycle (combustion at constant pressure) are Diesel engine. Modern slow speed marine diesel engine use dual cycle. Otto cycle...

The new motor has a different frame as compared to factory fitted motor. 80 vs 71. I had to modify the motor mount so that it can fit the lathe. From my experience I can say that it was not a straight swap job for conversion. If you want to go down this path do your homework first. Get as much...