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  1. dgallup

    internal combustion engine stuck valves

    The oil was identified as Mobil Pegasus which is specifically formulated for natural gas engines and widely used so I wouldn't expect that to be the source of the problem. That gas analysis looks almost suspiciously too good, zero sulfur. But something is causing a lot of deposits. Do these...
  2. dgallup

    Winter tires that don't work in snow

    Tires used to be a lot less specialized than they are today. I had a '79 Mustang that I drove all over the north east on a set of Goodyear Eagle GT tires. Went to nearly every ski area in VT and NH on the snowiest days and commuted on the slushiest and/or coldest days and drove the wheels off...
  3. dgallup

    Two-slider crank mechanism

    Doubling the crank speed is of very little benefit as every practical motor vehicle has to have gear reduction from crankshaft RPM to wheel RPM. Your engine would need an even higher gear ratio reduction. My experience with the patent office is they will grant patents with gross obvious flaws...
  4. dgallup

    Dynomometer

    The absorption curve is just the maximum the dyno is rated to be able to absorb. As long as you are under the curve you should have no problem. At 1800 RPM the dyno is rated for almost 3 times your 700 HP. The only potential problem I could see is if you need to do some testing at very low...
  5. dgallup

    Fuel Saving Idea?

    Generally speaking, freewheeling is considered somewhat dangerous and not recommended. You can pick up considerable speed plus your brake vacuum boost and power steering are reduced. Not to say I've never done it. I was driving to the '79 Watkins Glen GP in my Mustang very late at night. I...
  6. dgallup

    Recording changes on a 2D Print

    I loved it when we acquired a smaller company and I tried to trace back the changes thru their ECN forms. Most typical revisions said "Changed Dims". I kid you not. ---------------------------------------- The Help for this program was created in Windows Help format, which depends on a...
  7. dgallup

    Cylinder Pressure at bottom of power stroke

    Turbo or NA? It's going to make a big difference. ---------------------------------------- The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
  8. dgallup

    Sealing of an overmolded electrical connector pin

    You need some form of seal otherwise the fluid will wick along the pins. I've seen designs with round pins and an o-ring on each pin. I've seen designs with the electronics encapsulated in various materials and the seals put around the encapsulation. There are may ways to skin this cat but...
  9. dgallup

    Surface Roughness

    For plastic mold making the Society of the Plastics Industry (SPI) Moldmakers Division has a scale for the surface of mold tooling that is similar to what you are looking at. They sell a plastic plaque, the SPI Mold Finish Guide for optical comparison. However, I don't see a grade that I can...
  10. dgallup

    ASME Drawing Standards - Metric

    I despise using dual dimensions. I've been designing metric products in the US for over 40 years and only use dual dimensioning when somebody holds a gun to my head. Suppliers will try to use the secondary dimensions for layouts, inspection reports, etc. You will fight round off errors...
  11. dgallup

    Bayonet feature dimensioning

    The customer doesn't want a cam or detent feature. I was hoping some one could dig up a spec or example of a bayonet connection. But I can reinvent the wheel. ---------------------------------------- The Help for this program was created in Windows Help format, which depends on a feature...
  12. dgallup

    Bayonet feature dimensioning

    I'm considering all the aspects of the slots, not just the stop. If the two start slots are off the mating part won't even start. And the horizontal legs need to be pretty co-planar or it won't turn. ---------------------------------------- The Help for this program was created in Windows...
  13. dgallup

    Bayonet feature dimensioning

    Sure one side will hit first but the second can't be too far out of position or it won't work at all. ---------------------------------------- The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
  14. dgallup

    Bayonet feature dimensioning

    I've got a part with a bayonet feature on one end that another part will lock into. I'm not sure what is the best way to ensure proper position of these features to the ID bore and to each other. The mating part will slide in the bore and have a cross pin that has to slide in the slot on both...
  15. dgallup

    Best plastic material/ grade for Plastic Pallet

    90% of engineering decisions come down to cost. ---------------------------------------- The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
  16. dgallup

    Font Problems in Creo drawings

    Can you just copy the font file to where Creo stores it's internal fonts? ---------------------------------------- The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
  17. dgallup

    Half increment metric sockets

    Good find. I'm hoping most users would get those horrible sheet metal covered lug nuts off once and replace them with proper one piece nuts. Really surprised some enterprising bottom dwelling scum sucking lawyer hasn't created the largest class action suit in history and sued every car...
  18. dgallup

    Family Drawings Revision Help

    We would have supplied PPAP samples to the customer prior to making the change for them to approve. ---------------------------------------- The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
  19. dgallup

    Family Drawings Revision Help

    3DDave If "We checked it and it's just as good" isn't always true then you have an incompetent engineering department. ---------------------------------------- The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
  20. dgallup

    Lithium battery collection for recycling or disposal.

    I have my doubts that EV Batteries Are Perfect For Storing Solar Power. The lithium batteries typically used for permanent storage are a different chemistry than EV batteries. EV batteries are a much greater fire hazard so clustering them together isn't the best idea. They also can't be...

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