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  1. R

    Amazingly ! the website ultralightnews.com is still up.

    As only you can truly know - there is a lot of time and effort put into what you and Dave did. I hope that either of you would want the work to become a legacy item. I hope someone finds a way to ensure Dave's work is not lost.
  2. R

    Change.org: Urge the FAA to Address the Deficit of Ultralight Aircraft Instructors

    Power output of the engines is highly dependent of what exhaust is used. The 430 is the product of a 294 crankcase and fan housing fitted with 440 cylinders and heads. This reduced crankcase volume for more performance and lowered weight. There is a problem though. The cylinder air jacket does...
  3. R

    Amazingly ! the website ultralightnews.com is still up.

    I was not aware that Dave Loveman had passed. I'm not technically savvy enough to know how to gather the data on the web site to save it so that it can be shared. It needs to be saved. I will pledge money to help do so. I remember the VULA site and the tragic loss of that data base. Then we...
  4. R

    Change.org: Urge the FAA to Address the Deficit of Ultralight Aircraft Instructors

    I've owned a number of Pterodactyls including an Ascender II+2. It is unfortunate that the days of buying new engines for under $1K are long gone and engine options are limited. While the Polini 303 is an option - I suggest caution. Pterodactyl LTD considered the 38hp 430 Cuyuna to be minimal...
  5. R

    VW Heads Designed for Aircraft- Poll

    Lack of print speed was not a problem. It was competitive with SLA and SLS processes as the build process was continuous rather than cyclic as in SLS or SLA. BPM produced better surface finish than SLS. As I stated - the problem was the fragile build material and easily clogged print head. The...
  6. R

    VW Heads Designed for Aircraft- Poll

    The BPM Personal Modeler is a fully self contained 3 dimensional printer. BPM Technologies began operations about 1993. Their printers were available during the mid to late 1990's. The "BPM" process is ballistic particle manufacturing. Their unusual process was to use a 5 axis controlled ink...
  7. R

    VW Heads Designed for Aircraft- Poll

    The neat part of the BPM 3D printer was that the software made the part outside surfaces solid with an open honeycomb supporting the space between the outside surfaces. This greatly reduced the amount of build material needed - and in my case - to be dissolved/burned/melted out. The build...
  8. R

    VW Heads Designed for Aircraft- Poll

    It seems I missed this post of a year ago. When I was working on developing the 2 cylinder Corvair back in the early 1990s, I purchased a BPM 3 dimensional printer to make investment casting patterns. My initial product was to be cylinder heads and move along from there. I had experience with...
  9. R

    repair of resin starved composite

    This Streak Shadow did not come with a separate tank. It was an integral part of the composite fuselage tub constructed by the builder. Dave used the resin that was specified. I recall the build took him a number of years. I think I recall hearing of the plane for some 8 years before finally...
  10. R

    repair of resin starved composite

    I'm not trying to stir a pot but a number of folks had problems with epoxy and fuel. One I personally was involved with was a CFM Streak Shadow at one of our events back in the late 90's/2000. The plane had a fuel starvation problem. Inspection of the fuel filter showed small hair like debris...
  11. R

    Fastener Heads

    I ended up with some decades ago as one of my sales men asked me to try it. It worked. I never ran out as I simply didn't use it much. I tended to break the tips off phillips screwdrivers as it was. The nice part of the small tube was that nozzle tip lent it's self to applying small amounts or...
  12. R

    Fastener Heads

    A commercial made product for increasing grip up to 400% in fasteners (some tests say 800%) is Screw Grab. It is silicon carbide in a gel suspension. Here is a link for more info. SCREW GRAB
  13. R

    Ultralight Float Plane Concept

    Part 103 states allowed weights for amphib floats. 30 lbs per float or 30 lbs for an amphib hull plus 10 lbs for each float and pylon. 254 lbs base plane. 60 lbs for 2 floats. 24 lbs for safety equipment. A UL on floats could weigh 338 lbs plus 30 lbs for the weight of 5 gallons of fuel.
  14. R

    It seemed like a simple plan...

    We went down this rabbit hole a few months ago. The issue with MIG is that there is absolutely no preheating of the components before filler metal is applied. This results in a region that has very little penetration and very little blending of the filler with the base metal. TIG or O/A allows...
  15. R

    methyl methacrylate (MMA)

    Here is a sample of what I described in my previous post of military electrical cabinets that were manufactured using bonded joints. These cabinets were cut up to make shop tables and stools at a school. They immediately began experiencing unexpected failures resulting in them being scrapped. I...
  16. R

    methyl methacrylate (MMA)

    Semi trailers are being assembled using 3M VBH tape to bond the FRP sides to the chassis. I've seen bonding of aluminum fail. With epoxies and Gerolite. I have electrical cabinets with bonded joints that have been weather exposed in Michigan for 40 years that simply fall apart when handled...
  17. R

    methyl methacrylate (MMA)

    I know semi trailers have a pneumatic "slider" latch that is a tube that gets shorter when inflated and in doing so pulls the latching pins that secure the axles under the trailer - allowing the axles to be relocated for proper weight distribution. I don't recall how much the bladders change in...
  18. R

    Aircraft Hangar Lift Help

    I've owned a number of forklifts. Minimum of 3500lb capacity up through 10,000lbs. I also own mining machinery. I would suggest not overthinking the load requirements. Some forklifts use ball bearings for the rolling elements. Others use roller bearings. When one of my forklifts used caged...
  19. R

    O-100-- interesting new engine

    I used to fly my Drifter single seat (DR-277) to events that were hundreds of miles away. Power was a Cuyuna ULII-02. Overpropped and thus limited to approximately 30hp. I'd pack it with camping gear, clothes, some food, tie downs, tools, 2 stroke oil and as much as 13 gallons of fuel. Gross...
  20. R

    O-100-- interesting new engine

    I knew of a Challenger 2 with a 447 that was used for training here in Michigan back in the 90's. Pilot/instructor was light built guy - maybe 175lbs. I have a CH 2 with a 503 and a guy didn't think it has enough power for 475lbs of pilot and passenger with 2100ft of grass with 30-60ft trees at...
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