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  1. mikeneal

    Mechanical engineer: how to work faster?

    Early on in my career I tried to work fast at the expense of accuracy and i missed some details. Lucky I had a older fantastic boss that sat me down and told me when i give you a task I am not impressed if you do it faster than I thought it would take. I do care if it has errors, rule number...
  2. mikeneal

    Tap & thread directly into 7075 or use Time-Sert's insert?

    Not exactly same application but I have a 316SS brake caliper bracket on a boat trailer and it is .375-16 thread and has about .25" engagement. I hate it and always use some thread locker (typically blue) when I assemble it. If it was me, I would put a keensert in your 7075 bracket.
  3. mikeneal

    How do I represent a bolt/pin inside of a block?

    I cannot recall what exactly error 3001 is and away from FEMAP so cant look it up. General thoughts, can you trouble shoot it by doing a modal analysis (use bailout if you must) and seeing how it behaves? If it wont run add some secondary "extra" constraints if you have to in order to get it...
  4. mikeneal

    Fastener Design

    Marvin83, Nice calculator , can you need to make an English version for us Americans that hate the Metric system. :-)
  5. mikeneal

    Mesh size

    That is a open ended question and not easily answered. Basically the mesh has to be fine enough to capture the solution with the accuracy you require. How small is that? It depends on many things and cant be easily answered here. Obviously mesh must be better in regions where stress...
  6. mikeneal

    Diesel Engine Testing Questions

    I found out there is not a MAF sensor on the 7.3PSD and actually there is very little data available too me via the OBD-II port, so it seems I must gather the flow data the old fashioned way. Open to suggestions if anyone has been down this road before and had any lessons learned /advice they...
  7. mikeneal

    Diesel Engine Testing Questions

    I have found out some aftermarket gauge monitors /tuners have the ability to report MAF but I am having trouble getting any applications people are the various manufactures to sign up if they can definitely do that. If by chance I cannot get that data from OBDII port anyone have suggestions...
  8. mikeneal

    Diesel Engine Testing Questions

    I am doing some real world testing using a 7.3liter TD (Ford/International) with the intent of gathering information to perform some exhaust CFD modeling. Any exhaust experts have any advice as to best way to measure flow? I plan in placing numerous temp and static pressure taps along the...
  9. mikeneal

    Small amount of gasoline in diesel fuel?

    I measured the exact depth and I have about 38 gallons of fuel and have about 1 gallon of gas mixed in.
  10. mikeneal

    Small amount of gasoline in diesel fuel?

    I wondered about the moister absorption during storage because I use so very little fuel oil. I would actually prefer to have a smaller tank so I could store ~what my annual usage was and reduce air space in the tank. I only use 20-30 gal/year and the tank is about 150 gallons so it always has...
  11. mikeneal

    Small amount of gasoline in diesel fuel?

    Good too hear dcasto. I wondered since the tank is vented (not a sealed container) if the gasoline would evaporate. I was not looking forward to trying to figure out what to do with all that tainted deisel.
  12. mikeneal

    Small amount of gasoline in diesel fuel?

    The system does not have any type of recirculation, it is has a fairly straight forward positive displacement pump that supplies fuel oil to burner. The tank is located outside and considerable distance from anything. I typically purchase the diesel at local stations (no real help and/or...
  13. mikeneal

    Small amount of gasoline in diesel fuel?

    I have a home heating fuel oil furnace that uses #2 fuel oil and since I live in a very moderate climate (SW Florida) I only use it several days of the year. Since local fuel companies have fairly large minimum delivery requirements I typically purchase ~20 gallons of diesel a year and add it...
  14. mikeneal

    Steady State Thermal Analysis with Contact Region

    I am trying to do a verification model of a simple two piece assembly I exported in parasolid and created glued contact surfaces. I performed a hand calculation and the results do not match. Furthermore there is a large thermal gradient thru the contact region. When I model the assembly as...
  15. mikeneal

    How to create masterial

    I am newbe FEAMAP / NX Nastran user (used Pro/Mechanica in the past) and I am trying to create a material file to represent a non isotropic material (circuit card). I cannot find a good example in the documentation. Any tips?

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