Vans Aircraft

Discussion in 'Handy Resources' started by Randy, Jan 6, 2018.

  1. Jan 6, 2018 #1

    Randy

    Randy

    Randy

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    Just made my first Vans purchase, a NACA side air vent kit. It arrived with the NACA scoop, 3' of expandable hose, two hose clamps, a whisper-flo vent, scoop to hose adapter, install instructions and full size patterns for the scoop install.
    Quality of all parts is excellent for a grand total of $39. I am happy :)

    One question - do I install screen between the fuselage skin and the scoop and if so does this significantly cut down on the air flow ?
    Or, how do I keep unwanted company out of the cockpit and still climb out of the cockpit looking cool and fresh ? :)
    Thank you,
     
  2. Jan 6, 2018 #2

    Timbob

    Timbob

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    You plan on flying at grasshopper flight levels?
     
  3. Jan 6, 2018 #3

    taff

    taff

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    Take offs and landing are always at bug level, especially if flying off grass.
    In the summer I cleaned my windshield after every flight.
     
  4. Jan 6, 2018 #4

    EAABipe40FF

    EAABipe40FF

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    Put it on the right side and probably never get a bug. (English engine put on left)
     
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  5. Jan 6, 2018 #5

    Randy

    Randy

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    More concerned about what crawls in when the prop isn't turning :)
     
  6. Jan 6, 2018 #6

    navybipe

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    seems like a foam rubber plug type thing stuck in the scoop with a "remove before flight" streamer would work
     
  7. Jan 6, 2018 #7

    taff

    taff

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    This where I positioned the screen. I had to go hunting for these pix.
    Screen is on inside between the plastic and the aluminum skin.

    DSC_8189 (1280x857).jpg

    DSCN0657 (1280x1010).jpg

    DSCN0661 (1280x958).jpg
     
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  8. Jan 6, 2018 #8

    toobuilder

    toobuilder

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    NACA ducts are not as forgiving of restrictions as scoops. The ducts are super critical with regards to the surface at the skin, so I'd say that a screen (which incresibly restrictive) would essentially destroy the flow. The key to a NACA duct is the corners of the inlet sides remaining razor shatp, for example. A slight radius (airfoil) at the skin is also a key. A screen at the skin would destroy both of these elements.
     
  9. Jan 6, 2018 #9

    Eagle-Mike

    Eagle-Mike

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    I have ducts on both sides of my Eagle. Never had a bug inside although I operate from turf.
    Bugs don't have a chance to come in. They are mashed from the prop before.
     
  10. Jan 6, 2018 #10

    Cameron

    Cameron

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    Ditto. I don't think a screen is needed.
     
  11. Jan 6, 2018 #11

    Larry Lyons

    Larry Lyons

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    I'm with Toolbuilder, a screen there will destroy the Aerodynamics of your scoop.
     
  12. Jan 6, 2018 #12

    taff

    taff

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    :)
    That prop certainly accelerated those bugs to my windshield I hope they were dead before impact. Maybe it shoots 'em down the sides also.

    One day after a pancake breakfast (I used to leave the side window open on the Citabria, to vent the hot air).
    Anyway, leaving and at about cross wind I noticed this animal sitting on the glare panel (animal! Ok it was a very large gross, wasp like insect, about a inch and a quarter long with a pointed tail)
    It relocated to the top of my v card compass and starred at me. I opened my side window but that critter had no incline to move.
    I did not want to even talk to it much less swat it in the direction of the window.
    After landing I slowly exited and found a newspaper that I could assist the hiker in the exit direction.
    That was a nerve wracking flight home.
    Yes, bugs can enter while parked :)
     
  13. Jan 6, 2018 #13

    Larry Lyons

    Larry Lyons

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    That would get my attention! :eek:
     
  14. Jan 6, 2018 #14

    ndlakesdreamer

    ndlakesdreamer

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    larger critters that encounter the prop will enter the scoop at least the liquid and pureed parts. Don't ask for details it's pretty gory.
    I vote for a screen of some kind
     
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  15. Jan 6, 2018 #15

    Knight Twister

    Knight Twister

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    Unless its a Brown recluse I'm not worried. Being a lifetime motorcycle rider I've gotten used to eating bugs.
     
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  16. Jan 6, 2018 #16

    cleko

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    I had NACA vents on both sides of my RV6 - put the screen on the output side of the vent connected to the hose. I connected the vent to the hose with a wire tie on the outside of the hose. I had the hose come off one cold day. Quickly filled the cockpit with cold air. The SV5 does not seal very well and needs a cap in cold weather. The placement of the vent on an RV is critical. They don't work on the canopy skirt. I used the RV-10 type push-out scoops on the RV-4. Don't seem to need any vent on the AS1 :)
     
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  17. Jan 12, 2018 #17

    Lotahp1

    Lotahp1

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    Taff...where did you get those vents? That setup looks awesome for a canopy plane.
     
  18. Jan 12, 2018 #18

    taff

    taff

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    One of the guys on the forum gave me his name.
    Out of town right now. Will look then I get back.
     
  19. Jan 24, 2018 #19

    taff

    taff

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    I am back in town.
    I purchased the vents from Davies Aero.

    Rayal Dec 1978 (1024x708) - Copy.jpg
     
  20. Jan 24, 2018 #20

    Beej

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