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  1. amorrison

    ABM types

    1. The standard ABM seems to be the ABM coming toward the incoming missile at a high velocity (vector) difference. Another option 2. Upon detection of missile, an ABM is launched and controlled via thrust to FOLLOW the missile and catch up to it. Eventually with no velocity difference the...
  2. amorrison

    gasoline direct injection compression ignition engine

    Gasoline is not a good lubricant for the injection mechanism - diesel fuel is.
  3. amorrison

    Adding glycol to a chilled water system

    Agree with cranky108. Make sure the pumps have mechanical seals - packing allows capillary action causing "driping of fluid.
  4. amorrison

    Cooling a craft if the external temperature is higher than the medium you are using to cool it is?

    Check out the Russian Venus landers in the 1960's . The surface temperature of Venus is 700 F , the landers internal electronics will fry at 300 F. Solution - insulated box - with electronics inside, liquid next then the insulation on the hot outside. Some liquid was chosen that would vaporize...
  5. amorrison

    Major Difference between DCS and SCADA

    Search SCADA on the entire site of eng-tips. Some of the questions are very similar to yours.
  6. amorrison

    Finding material which can fulfill certain requirements

    More generally - checkout books by "Ashby" on Amazon.
  7. amorrison

    CFD software comparison and Cloud CFD

    Spend some time with www.cfd-online.com
  8. amorrison

    Removal of ethanol from gasoline

    Recommend you post this question to the chemical engineering group - other topics.
  9. amorrison

    Pressure sensor at the microscale

    There are pressure sensors that can control to 1 Pa. They can control the airflow (HVAC)through an open doorway. Recall 1 ATM = 1.03 x 10^^5 Pa so this "pressure" is next to nothing. Googling "Pa" or force and sensor will probably get you what you want.
  10. amorrison

    Time to heat a packed bed

    I would post this question to - Chemical engineering other topics. I think they do this all the time.
  11. amorrison

    Mechanical gyroscopes for vehicles examples wtd

    I want to build a flying platform ~24 ft long, 8 ft wide and 3 ft high. I am very concerned about the low inertia of the longitudinal/roll axis - if a gust of wind causes severe roll to happen -say 30 degrees in 0.5 seconds the pilot will not be able to react quickly enough. Therefore -two...
  12. amorrison

    Mechanical gyroscopes for vehicles examples wtd

    I want to build a gyro from a motorcycle wheel - maybe about 30lbs including motor to maintain gyro rpm. Does anyone have any examples of similar size/capability? Thanks.
  13. amorrison

    Percent Solid of Debris Netting based on permeability test

    Imo this is rare expertize in ME. I think you will get a better response in forum135 .
  14. amorrison

    Freezing pipes - domestic water service

    Winnipeg Canada has had a super cold winter (2013-2014) with frost depth now at 7-8 ft. The street domestic water supply pipes are being plugged with ice. City workers are defrosting the pipes by electric (welder?) resistance heating which takes 20 min > hours? each time - there are 1000 houses...
  15. amorrison

    What is the typical stud spacing for wood or metal studs?

    Standard dimension in Canada is 16 inches center to center for 2 by 4 inch(actually 1.5x3.5inch) wood studs. If 2x6 (actually 1.5x5.5 inches) studs are used then the center to center distance is 24 inches. Don't know for steel studs but probably the same so they can be substituted 1:1.
  16. amorrison

    How to quantify brittle failure?

    Maybe a new post (do not copy this thread) to forum274 will get you some help.
  17. amorrison

    Help with shaft seal options for water pump application

    There is a pump group at forum407
  18. amorrison

    purple/brown tinted discoloration on internal hookup wires

    A quick and dirty answer might be to hold some new white wire over a candle flame at various heights and see what happens. If you are worried about the candle flames "products of conbustion" maybe a 100 watt light bulb as the heat source or a hot soldering iron.
  19. amorrison

    how to measure belt slippage

    Mark pulley and belts. Get a strobe flash that can be activated by one of the markers - this will work during a full load test -slipage might only occur at full load. Can a cell phone with an "app" be made to do this ? - along with complete recording video.
  20. amorrison

    Stress-Strain Curve for Prestressing Wire

    Because of the spiral angle of the wire groupings the "E" of the group will be different than one wire with no angle. As the wire group stretches the angle of the spiral will change.

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