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Does your compressor have an unloader valve? Or can you fix one to it? Unloader valve is kept open during compressor starting. This way the motor can run up to the speed with no load. Then unloader valve is closed and compressor starts pumping. Regards Nikhil

Just got email from Reeves that castings are not available. They may be available in Jan. So wait and watch for now.

Good day, I am planning to buy a complete casting kit for ME beam engine from Reeves website. I read in some forum that the castings are high quality and in some that they were bad. Any idea how the castings are on an average? Earlier I built 2 engines from PM Research castings and they were...

Welcome Arjun. I am from Vidharba. Where are you from? Regards Nikhil

I was thinking that with communist/ socialist government exploitation of poor will be absent. All being equal and all that stuff. But it is exactly opposite.

Good day, Recently I was in China for 2 months. I was at a shipyard getting a new Jackup barge ready for my company. The work culture there is horrible even to my third world view (Indian). Work starts at 0700 hrs in morning. Lunch break at 1100 hrs. Resume work at 1300 hrs. Dinner break at...

Hi, I came across a video of opposed piston engine on YouTube. Does anyone recognise this engine? Are plans available for this engine? Regards Nikhil

In marine industry there are special "boilers" where oil is used instead of water, called thermal oil boilers. Heated oil at lower pressure and high temperature is used as a heat source for various processes. I don't know which oil they use as a working fluid, but it can suit your purpose...

I don't know about clearance values. But I have seen use of backup ring, generally made of Teflon to prevent squeezing. I have seen O rings in pneumatic valve spool but never in hydraulic valve spool.

I think performance of O ring seal will have different criteria for static seal and dynamic seal. In static seal clearance can be more than dynamic type as there is less possibility of O ring squeezing through the gap. regards Nikhil

I made a Stirling engine during my college days. It had a truck cylinder liner as hot end cylinder, dia about 80 0r 90mm.. For power cylinder I used a 100cc 2 stroke engine block, dia about 50mm. Regards Nikhil

2 stroke engines with exhaust valve are common in marine industry. Generally all ocean going ships have a 2 stroke engine with turbocharger and exhaust valve with uniflow scavenge. Exhaust valve gives good scavenging efficiency with less mixing of exhaust and fresh air.

I work on oil rigs. There I have experienced a peculiar problem with DC motors. We have many treadmill in our gym. These are used mostly on lower speed for walking. The motors have only motor driven cooling fan. So at slow speed they become quite hot. We had many treadmill breakdown due to...

I recently converted my lathe to 3 phase power by using VFD. To protect the VFD and motor I used a fuse inline with the power input to VFD. I used a 10 A fuse, my motor is 1.5 kW and mains power is 220V. As far as I know start push button on motor control circuit are non latching type. So to...

The gears are for a model traction engine I am trying to built. They are not super critical dimensionally or otherwise. Regards Nikhil

@Jasonb Thanks for the help. I was able to cut the gear. I read in your post somewhere that mod 1 gear depth is 2.4mm. I kept the same. This was my first time cutting a gear. Now I am a little less scared to use a rotary table and indexing plates. I now have to cut more gears, 42T, 30T, 16T...

I have a Seig X2.7 mini mill. I have to cut a Mod 1 gear with 63 teeth in aluminium. I have commercial Mod 1 gear cutter set. I checked the internet for gear dimensions and indexing calculation. Mod 1 gear. 63 teeth OD 65mm Root dia 60.5mm Pitch dia 63mm. My rotary table has 1:72 ratio. I will...

Stupid question. Your two cylinder heads are mirror image of each other with intake port inboard and exhaust ports outboard. Does the cams and plumbing match this setup? Regards Nikhil

This is a container ship. Its normal electrical load demand is high because it carries several thousand refer containers. Generally these ships will have 3 or more generators of 1500-2000kW capacity each at 1000V. Blowers for assisting main engine are big but I don't think they will exceed...

During my college days studying mechanical engineering I made a Stirling engine for some project. Then life took over and I forgot about it. Then I somehow started watching Keith Appleton video on YouTube. This rekindled my interest in model engines. One thing lead to another and I bought a...