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  1. David L. Downey

    RANS S-12XL question?

    Sorry. This does not seem to be the place for this (moderators?) but... In the support vacuum from RANS, I need to ask for help here: If anyone has an S-12XL, would they be willing to take some images and basic measurements of the link pushrod (#11 in the attached schematic) between the rod end...
  2. David L. Downey

    Not a usual VW platfrom?

    Been thinking about using a flywheel drive 18xx cc VW on the RANS S-12XL in place of the 503DCDI I have for it. While it would be heavier than the 503, it would likely be quite a bit lighter than the 912 the plane routinely flies with? Other than designing the engine mounting adapter and working...
  3. David L. Downey

    PL-4, MacDonald S-2X, RV4, DA-2b/b scratch builds?

    I would appreciate input from the esteemed critics here on the following discussion: From Effort vs reward perspective, which of the 4 aircraft listed above, if built to VW power with redrive, climb prop, single seat configuration, will take the most focus, tooling, and time to build contrasted...
  4. David L. Downey

    Help identifying a Loehle 5151 airframe?

    Does anyone know anything about a blue and white Loehle 5151 with the identifiers LAC straddling the fuselage stars and bars? Supposedly had a Harley/belt reduction installation at one time? Thanks.
  5. David L. Downey

    Old Ford Fiesta? Conversion?

    When I was at OSH in 1981 I saw a very simple Ford Fiesta conversion out of Canada. I bought the plans because the redrive was a very simple affair made from the front drive kingpin/hub. Somewhere along the line I lost those drawings. Does anyone still have a set that I could get a copy of? Thanks
  6. David L. Downey

    Paz PL-4

    Does anyone have a set of PL-4 plans they are considering selling? Thanks.
  7. David L. Downey

    location of MAC?

    So I know how to calculate MAC for pretty much all monoplane planforms. But...how do you calculate the MAC on a biplane with positive stagger and straight lower wing/swept upper wing? And for the sake of precision, do you ignore angle of incidence differences between the wings? Then, if using a...
  8. David L. Downey

    very nice Aerotique Parasol once again for sale

    Moderator: if this is inapropriate please advise how to get the word out. Thank you. The very nice Aerotique parasol once owned by Vic Perez is now up for sale after 3 years of continuous flying by its new owner, Richard. He is only selling because he can't get in or out any more. I just...
  9. David L. Downey

    Graham Lee Beamcraft I and II, Circa Reproductions Beamer I and II???

    Does anyone know if the Graham Lee BeamCraft/Beamers ever actually got flown/flight tested? Mnay years ago I got a copy of a set of drawings for something called a "Beancraft II" that has a set of sparse building guidelines that has Graham Lee's name at the bottom. Very interesting minimal...
  10. David L. Downey

    toe-in or toe-out with gear deflection under load???

    lots of smart people on here....please give some feedback? Thank you. I have a design underway for a very light tractor, tail-dragger biplane that is currently configured with a J3 style shock absorbing gear. The issue is that the gear is more like a tri-pacer in that the main struts are...
  11. David L. Downey

    503 CHT rings???

    Can someone point me to an authoritative source for how to use BR8ES plugs with CHT ring terminals on the Rotax 503 DCSI fan cooled points engine? The plug comes with a crush washer but if it is retained when using the CHT ring I would think the seal washer would be installed between the ring...
  12. David L. Downey

    converting Rotax 503 from fan cooled to free air???

    I only saw a thread from back in 2010-2012 dealing with this subject and it was abbreviated and not very informative. Can anyone tell me if it is feasible to convert a fan cooled 503 to free air? can the cooling tin, fan, and belt be removed and the engine run as is? or, does the fan tower...
  13. David L. Downey

    Ken Brock's Avion

    I searched and read all the references I found on Ken Brock's Avion UL both on here and the general web. Is this a dead end road? Was it built from a highly prefabricated kit only or was it also plans build or mareial kit build? Does anyone know of any surviving plans? Thanks.
  14. David L. Downey

    missing page(s) in Der Jager plans sheets?

    I thought I already asked this a few days ago but since I could not find the post I decided to post again. In studying my Der Jager plans set I realized that many wing construction details were missing and when I did the sheet inventory I fond that sheet 15 is missing - right in the middle of...
  15. David L. Downey

    Der Jager plans?

    Hello all, does anyone have sheet 15 from the DerJager plans? My drawing set is missing that sheet and much wing/airfoil detail. I have sheets 1-14 and 16-19. Is there a "table of contents" or a sheet list for these plans? I woul d like to get an image of that seheet if it exists. and...any of...
  16. David L. Downey

    Aerotique Parasol

    Wondering if anyone on ths board has knowledge of an example of the Aerotique Parasol. prefer unairworthy and no powerplant for reverse engineering effort. Thanks.
  17. David L. Downey

    windshield option?

    I just got this ad and thought it might be useful to others building planes as well. please note that the screen are 1/8" polycarbonate (not acrylic) so they will scratch easier. However, polycarb is extremely impact resistant and was likely not stretched so the thickness is probably very near...
  18. David L. Downey

    Der Kricket?

    waaay back in the late 70s I had plans to Der Kricket. Looks like I lost them at some point. Does anyone know anything about that possibility of getting a replacement set of drawings?
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