Bisphenol-A Finally Makes the FDA’s Radar

This blog is no stranger to the topic of bisphenol-A (BPA). The chemical is considered the most common form of polycarbonate plastic, and is largely found in #7 plastic materials and as an antioxidant in plasticizers for #3 plastics. BPA is an endocrine disruptor, which may mimic the body's hor

Solar Design T-Square and Clam Shaped Reflectors

Parabolic dishes are not good for solar cooking because they need to be re aimed very often and there is danger of skin and eye burns from the concentrated light. Also, if the sun hits them at a narrow angle, there is a second order focus that can catch things on fire 8 or 10 ft away.

So

Circuit Peak Detect Issue with OpAmp

G'daY,

Please examine schematic created by B.H.Abbott at LINK

I have made the circuit on a breadoard for the 2A charger. Issue I am encountering is that when both "-" and "+" pins on the OpAmp reach equal voltage, the charge stops and the OpAmp output goes high. Charge is suppo

Anti-Sweat Insulation vs. IMO MODU

Dear all! My material for anti-sweat insulation for an offshore project is Elastomeric nitrile rubber. Now my clinet comment: " material must be non-combustible according to chapter 9.2.5 of IMO MODU code". I don't find any statement in this code.

Please help me!

Our project must follo

Stand Alone Solar Power Generation System

Dear Sir

We are designing stand-alone solar power generation system and storage battery back-up for evening and night time. The power generation output is 200kW with tracker. But, daily loads changes 30kw to 160kw at peak and so we are studying how to consume the excess generated electricit

The Most Critical Inspections for a Crankshaft

i want to know what are the most critical inspections that should be applied on any crankshaft of any type

like : hardness test , torque , tensile , .... etc ??

and what is the universal specification that should be applied when manufacturing crankshafts like ASTM , EN , .... etc

Radial load vs. deflection in pressurized hose?

Hello Hosers!

I'm looking for a numerical method to estimate the radial deflection vs. applied radial load of a (short) bellows metal hose (with over-braids) when one end is fixed and the other is free to move. I am trying to estimate the case for a 2-inch diameter hose with 14 inches of liv

Replacement Kits for Plug-Sleeve type valves

I require Replacement Kits for Plug-Sleeve type valves of different makes - not necessarily OEM make. Any economical branded or non-branded repalcement kits of standard quality will do. Please guide how I shd go about sourcing them. Whether such manufacturers are traceable ? Is it legal to buy &