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  1. dholly

    Posted

    I completely agree about concern with Acetone, try everything on scrap first! However, after reading the one fellow on PracticaMachinist's repeated experience, I am curious as it does appear to fall into the 'limited resistance' or 'not recommended for continuous use' vs. 'causes immediate crazing' manufacturer warning category. I have an old skylight I no longer need, maybe I will try some of these limited resistance solvents.

    On the same note, I would be very careful using any alcohol as most also fall into the 'not recommended for continuous use' category. The exceptions being 50% Butyl, Ethyl or Methyl Alcohol and 40-100% Isopropol Alcohol. In addition to duration of contact, ambient temp also seems to factor in. It really doesn't help when different manufacturers list different warnings!

    Here are chemical compatibility chart from other acrylic sheet manufacturers if anyone cares to compare:

    Plexiglas: http://www.plexiglas.com/export/sites/plexiglas/.content/medias/downloads/resins-docs/plexiglas-ACRYLIC-RESISN-Chemical-Resistance.pdf

    Tap Plastics: https://www.tapplastics.com/uploads/pdf/acrylite_chem_resist.pdf

    Plastics Intl: http://www.plasticsintl.com/plastics_chemical_resistence_chart.html

    Plaskolite: http://www.plaskolite.com/Fabrication/Acrylic/Chemical-Resistance

    Acuity Brands: http://www.acuitybrandslighting.com/library/ll/documents/otherdocuments/acrylic-polycarbonate-compatibility.pdf

    Nuaire: https://www.nuaire.com/protected/bulletins-general//laminar-airflow-products/GTB0090%20Care%20%26%20Use%20of%20Acrylic.pdf

    ePlastics: http://www.eplastics.com/Plastic/Plastics_Library/Chemical-Resistance-of-Plexiglass-Acrylic

  4. Guest

    Posted

    Oh you are talking about the blown plexi windows that come with the Magnum! Whole different story. Those are very expensive and you have to try and save them. I think everclear 190 proof alcohol might be your best bet. I don't think it will hurt the plexi and in time will weaken the paper covering. i do not envy your position. Those windows would be VERY expensive to replace. I would not use acetone.

     

    Chris

  6. EDMO

    Posted · Edited by Ed In Missouri

    TJay,

    I think I may have sent the two mandatory service bulletins to you with the wing pages.

    The other one is for the triangles on the elevators.

    EDMO

  11. EDMO

    Posted · Edited by Ed In Missouri

    TJay,

    There was a mandatory SB on the vertical tube that holds the pedals - weld small triangles where the V-tube welds to the main bottom support cross tube. I may have posted it in files and forms?

    If later on, you find that your brakes don't hold on static runnup, come back to here and read what the other guys have done, or go to the Matco site and study the ratios - or both.

    EDMO

    I didn't find it in files and forms - guess I posted it somewhere else? I cant find it, maybe someone knows where it is?

    Guess I could post it again if you cant figure out what I tried to say.

  12. EDMO

    Posted · Edited by Ed In Missouri

    Ed, I think you have that backasswards. The Sky Raider is a 4130 chromoly fuse that was made in both single and tandem seating models. The SkyRanger is an aluminum fuse bolt together kit with 2-place side by side seating and sewn envelopes for wings and fuse. I looked at one with a 912ul and got the heebie jeebies, didn't look nearly as strong as a welded fuse.

    Got it now Doug. Ranger is the aluminum one with hundreds of bolts - don't leave home without them!

    Thanx for videos Doug and Luke.

    Got it Bandit - Thanx - is it smaller than Avid/Fox?

    Thanx Jim, but not buying - just nosey - The one for $11K looks like better buy.

    Guess I will stick with my Heavy Foxy. ;<)

    EDMO

  14. JustNorm

    Posted

    Hi I have been on holidays and away from the site for a bit so sorry to be late with some info.  That video is Ralph in his Avid.  He is running a 582 with a 3-1 gearbox and a three blade Warp Drive prop.  He gets some great performance from the plane but he flys at sea level so it may make a difference if you are not at sea level. I flew my speed wing at 3500 msl and did not see that kind of performance.  I was lucky to see 95mph.  I believe that my plane suffered from the higher altitude.  I was running a 582 with a 2.58-1 B-box and a two blade IVO.  My climb was good showing 800 to 900 fpm solo.  I never took a passenger with me because I did not trust the plane.  My landing and takeoff was in the 55 to 60mph range and the glide was that of a rock.  It dropped at 1000fpm and I had a motor out at 300 feet so I had 20secs to arrive at the seen of the accident.  I repaired the plane and sold it shortly after.  The guy that bought it was a former air force jet pilot and just loved it.  My thought is that with the extensions the plane would not have to work as hard to stay aloft and I do not think the speed would suffer.  (my thoughts not fact) This is a video of me landing and take off.  I land at 55 to 60mph and it is done flying. 

    The plane was also a handful to takeoff and before I bought it, the previous owner ground looped.  My test pilot, a man with thousands of hours in kitfoxs and some in Avids ground looped before the first flight.  I never ground looped it but did have it get away from me on a couple of landings.  I went back to my Buzzard and love it but I am working on rebuilding a Model IV KitFox.  I really enjoyed the way the Avid was a two finger flyer and hope to get back to that in the KitFox. 

    Good Luck but I think the extensions would be a good addition. 

  18. dholly

    Posted

    MTOW of SkyRanger is only 450kg or ~992lbs. This video will give you a good view of the Sky Ranger structure and assembly.

    1 person likes this

  22. 1avidflyer

    Posted

    You can cut the spring with a thin abrasive cutting wheel on a 4 1/2" grinder. Try not to get it to hot when cutting. Also, springs can be bent, but must be bent cold unless you retemper them. It takes a hydrolic press to bend the spring, but it's not that hard if you are set up. Jim Chuk

  23. Maddin

    Posted

    Thank You very much.

    Today i becoma a old spring from an van.

    I must bring it in the right dimensons. But i dont try to bent the Sprig with heat.

    I think this is not a homework too.

    The angle is fine. Onely the length and width must be done.

    I will,report after the work.

    Regats Martin

  24. dholly

    Posted

    Ed, I think you have that backasswards. The Sky Raider is a 4130 chromoly fuse that was made in both single and tandem seating models. The SkyRanger is an aluminum fuse bolt together kit with 2-place side by side seating and sewn envelopes for wings and fuse. I looked at one with a 912ul and got the heebie jeebies, didn't look nearly as strong as a welded fuse.

  25. EDMO

    Posted · Edited by Ed In Missouri

    I should have both kinds of Kitfox spring - need to find the aluminum one - even nose-draggers need a tailwheel when you fold the wings.

    The Texas Taildragger 150/150 Trainer had both tailwheel and nosewheel so students wouldn't nose it over when getting used to the brakes on a taildragger.

    EDMO