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  1. Rienk

    CNC Machine - for home-building aircraft

    This is a spin-off of Fritz's 'VP-21 HWC' thread, where we were discussing the possibility of more homebuilders being able to have their own CNC machine, and providing "open-source" plans, instructions, and parts lists (with suppliers) in order for people to quickly and inexpensively build one...
  2. Rienk

    Questions about Raymer's "Simplified Aircraft Design" Spreadsheet for Homebuilders

    So, I've been reviewing the spreadsheet linked earlier (http://www.southampton.ac.uk/~jps7/D8%20website/homebuild%20aircraft%20design%20spreadsheet.xls) and finding some issues that I don't understand. 1) In the sheet 'As Drawn Performance' in cell H41, I recognize all of the variables except...
  3. Rienk

    Savoia S60Aero Engine

    Some of you may have heard of the little Savoia S42A engine, a little 600cc four-stroke boxer. Apparently the company had stopped development of that engine, but have started a new 800cc V-twin conversion (four valves, per cylinder, EFI, etc). No word on if/when it will go into production, but...
  4. Rienk

    Static Thrust from VW engines

    Does anyone have real-world, actual test data, for static thrust measurements from any sort of VW aero engines? I hear a lot of banter about what engines can do, but no one seems to have done a simple static thrust test of their engine/prop combination.I would love to get some real measurements...
  5. Rienk

    Airfoil selection for the TS-2 (ultralight glider)

    I would appreciate some help in selecting an airfoil for our TS-2 concept, an ultralight glider, using the Tab & Slot method of wood and fabric construction. A few years ago, I was asked to do a presentation at the ESA conference. I presented the TS-1 POC, as well as the Solo LSA that evolved...
  6. Rienk

    Bucket List - the aircraft designs that I'd like to be a part of Building!

    Ever since I was part of building an airplane (Cuby) as a part of a highschool class, I dreamed of building affordable aircraft. My ultimate goal is a modern Chitty-Chitty-Bang-Bang (air, land and sea). But here is a list of the planes I want to build, or help build. The ones highlighted are...
  7. Rienk

    Trying to find temporary Paint or Finish that can Wash off later

    Hey guys, I'm not sure where to post this question, but here goes. I borrowed a 3D scanner today, in the hopes of scanning our engine (and some of it's parts separately), so that we can do a 3D model of it, and use it to lay out our tuned intake and exhaust systems inside the cowl, and also...
  8. Rienk

    103 Ultralight concept - thinking outside the box

    As many of you know, I've been toying around with designing a legal ultralight for a while. I've been noodling all sorts of ways to improve on the performance while still staying legal. Here are the pertinent thoughts that led me to a potential "eureka" moment. . Most people do not like how...
  9. Rienk

    SOLO - single seat sport plane

    Well friend, after a hiatus of a couple years (attending to keeping my main business out of bankruptcy) we are finally seeing some daylight at the end of the tunnel, and are able to pull some of our aircraft projects out of the closet, dust them off, and get back to work - albeit slowly. We have...
  10. Rienk

    Four engine - Electric Cri Cri

    First Flight For Four-Engine Electric Airplane The tiny all-electric four-engine aerobatic aircraft known as Cri-Cri, which is "cricket" in French, has flown for the first time, EADS has announced. The company's Innovation Works developed the airplane together with Aero Composites...
  11. Rienk

    Weight of fabric and paint systems

    Okay, I'm sure this has been gone over before, but my search brings up multiple threads but no specific posts with the answer I'm looking for. if you can point me to specific posts - great! And I'm not looking for all sorts of opinions on the best systems and why, so this thread should be short...
  12. Rienk

    LSA Motorglider concept

    My dear Smee - I've had an epiphany! I've heard (but not yet verified) that you can get a glider rating with less hours than an LSA. A glider rating does not require a medical (similar to LSA). A factory built LSA can be a glider (ready to fly S-LSA). Gilder pilots do not have as many...
  13. Rienk

    HSA conference in Tehachapi (Sept 3-6)

    OH MY GOSH ! I went to the ESA (experimental soaring association) website to look up some info from last year - and I see that I'm a speaker at this years Western Workshop... I HAD NO IDEA ! (you'd think they'd confirm with me). ANYWAY, I've been playing around with this design since...
  14. Rienk

    carbon/wood spar considerations

    Hey Orion, I have a couple of questions about making spars for such a design as we've been discussing in this thread. I intend to waterjet out all the various parts, including the wing ribs and spar web - using CF pultrusions for the caps. Let's see if I can explain this clearly... Right now...
  15. Rienk

    New Ultralight and LSA Trainer design PAIR 2

    Well, I haven't given up on this project, but I wanted to get rid of the poll :ermm: I keep wondering about the whole 103UL thing… it’s hard not to consider the options for making a truly inexpensive RTF aircraft, and realizing that the weight limit will be hard to meet – but going LSA is...
  16. Rienk

    New Ultralight and LSA Trainer design PAIR

    Sorry about the poll being first - it was supposed to be after this first post. Please read this and then respond to the poll. Thanks, RA Intro One of my passions (beside designing or building things) is to see young people get involved in flying. It is obvious that to do so, we need to make...
  17. Rienk

    Software for Design

    In several threads, an indirect topic of software files came up; so it brings up the question: What software do the professionals (or at least serious amateurs) here use for designing aircraft? I see that Orion has posted a Rhino file, others have mentioned Solidworks... who else uses those...
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