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  • Users: ddace
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  1. ddace

    electronic rust protection

    hey I would like the experts opinion on the "counteract electronic rust protection system" for automobiles by Canadian Tire thanks
  2. ddace

    electronic rust protection

    hey there I would like to know the pro's opinion on the Canadian Tire "counteract electronic rust protection system" thanks
  3. ddace

    static Electric Discharge hazard (more ???)

    This is a parallel question regarding the "static electric discharge hazard " thread The thread is quite interesting and has provided me some good information on the subjet. I am curently desining the fuel system, including the day tank, for a mobile diesel genset (approx 100gal/400l). I...
  4. ddace

    bolt & crown nut with cutter pin

    This question might seem lame but I want to know if it is at all possible, for a 1 inch grade 8 bolt torqued at only 200 ft*pound (very little preload) secured with a cutter pin, could come loose ? This is to secure diesel engine mounts on a skid base. So the joint will be exposed to engine...
  5. ddace

    nylon lock on nut vs loss of preload when torquing

    "ADMINISTRATION KILLS ENGINEERING" I am rigidly mounting a diesel engine with a through hole/slot that is connected to a rigid solid skid base.I am using 1 inch grade 8, coarse tread, zink plated shoulder bolts,washers at both ends and nuts have a nylon lock to help prevent loosening because of...
  6. ddace

    engine hard mounting vs thermal expansion

    "ADMINISTRATION KILLS ENGINEERING" Here it is I am designing a 2.7Mw mobile genset. The engine is a MTU 20v4000 that has four(4) mounts that are attached to a skid base. The installation specs require that mounting must be permissive to thermal expansion 1mm side to side with max...
  7. ddace

    Value for convection coefficient (h)

    I am desperatly trying to establish a good ball-park figure for the value of convection coefficient h in a forced air flow (fan) condition. This will be used to determine heat regection of an exhaust system inside a trailer(enclosure). I understand that h~10 is a rule of thumb for natural...
  8. ddace

    exhaust heat dissipation

    I am trying to establish the energy (watts) dissipated by an exhaust system. This is to determine the air flow needed to dissipate that heat from an enclosure. I want to considre only the forced convection effects by using the formula: Q(W)=h* area * (Tsurface - Tambiant) where h is the...
  9. ddace

    simple air flow problem

    Administration kills engineering. Design calculation ability is a muscle, if not trained it atrophies... I am curently designing a mobile generator unit in a closed area.I need to determine the amount of air flow requiered to maintain an ambiant temp of no more than 40ºc. Known: desired...
  10. ddace

    simple air flow problem

    Administration kills engineering. Design calculation ability is a muscle, if not trained it atrophies... I am curently designing a mobile generator unit in a closed area.I need to determine the amount of air flow requiered to maintain an ambiant temp of no more than 40ºc. Known: desired...

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