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Type: Posts; User: jetpack

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  1. Thread: Cox Reworks

    by jetpack
    Replies
    13
    Views
    1,701

    Cox .049/.051 TDFactory Tuning Specs

    Does anyone know the factory settings/running clearances that could be used to inspect/tune a TD?
    I'm thinking along the lines of the piston sub-port opening, where head shims can be added to adjust...
  2. Replies
    3
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    401

    Impeller Modifications

    I got to thinking....If a MiniFan 480 blade is too big or dont pull enough RPM's for the TD, wouldn't cutting down the fan blade area do the trick?

    Not off the diameter, cause I wanna keep...
  3. Replies
    85
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    9,565

    Berkeley F4D-1 Skyray 1/2A Ducted Fan

    I have a 1957 Berkeley Models Douglas Skyray F4D-1 kit, complete and unstarted in the box which I have been collecting information on to copy it and convert it to feather 2 channel elevon control...
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    1
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    605

    Cox .049/.051 TD Modifications and Set-up

    What are the most common modifications and set-ups to extract the best power and performance from a TD, pusher and standard configurations?
  5. Thread: Coverite

    by jetpack
    Replies
    0
    Views
    374

    Coverite

    This is a new product by Coverite.

    I'm in the process of building a 1/2A Ducted Fan kit from Berkeley Models - 1957, and its a stick and tissue gas powered kit, and it is originally tissue...
  6. Replies
    5
    Views
    1,156

    Small Parts

    A method that I plan on using to form a small nose cone and canopy for my stick and tissue plane that I'm working on is using a 2 Liter pop bottle for the plastic.

    I'm gonna carve plugs for each...
  7. Thread: My tricks

    by jetpack
    Replies
    1
    Views
    649

    My tricks

    Here's a method I have been using. Seems to save the tip from getting all chewed up too, by trying to remove the glue scab all the time to get it to flow.

    If your just taking a short break in...
  8. Thread: Copying a kit

    by jetpack
    Replies
    5
    Views
    1,195

    Copying a kit

    Well, the parts are not all shown on the drawing, which is a shame because it would spare me from having to remove the parts from the sheets, so it looks like it is necessary to seperate the parts.
    ...
  9. Replies
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    548

    EF Ducted Fan question

    I'm hoping I can find an answer or an idea to help me with a "almost" scratch-built plane that I have going.

    I say "almost" scratch-built, because it's an old Berkeley Models F4D Skyray. It is...
  10. Thread: Copying a kit

    by jetpack
    Replies
    5
    Views
    1,195

    Copying a kit

    I have an old 1957 Berkeley Models F4D Skyray kit I found at a garage sale a couple years ago. I bought it because I wanted to build a stick and tissue kit again as I did when I was young.

    ...
  11. Replies
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    3,059

    Nitrate Vs. Butylate

    What is the difference between these two types of dope? What is the application for each type?
  12. Replies
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    1,001

    Onion Skin Paper for Homemade Decals

    Besides being a rc modeller, i am also a plastic modeller. Here is a trick that we use for decals, maybe it could be of some help:


    1. Print your design on onion skin paper, and trim to size.
    ...
  13. Thread: 1/2 A DF

    by jetpack
    Replies
    13
    Views
    3,340

    Skyray 3-View Outline Drawings

    I included this post to provide anyone that shares an intrest in the kit that I am tracing out.

    The kit is very close to these outlines, and very few concessions were made to allow the fan to...
  14. Thread: 1/2 A DF

    by jetpack
    Replies
    13
    Views
    3,340

    elevon control

    The Skyray kit as mentioned was designed orignally for FF or Stanzel's Monoline set-up. The FF version has seperate ailerons, and rudder.

    With my plans of converting it to R/C, using a...
  15. Replies
    3
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    817

    Bead Idea

    Thanks for the great tip! I think im going to go that route.

    After I posted my question, I thought of using a glass jewelery bead, then the crimp. I think I seen that method before, but only...
  16. Replies
    3
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    817

    Music Wire Landing Gear

    What method would be good to use on keeping a wheel on its music wire (.047 in this case) landing gear? All the wheel collars that I've seen only fit standard large diameter axles, and are way over...
  17. Thread: Cox Reworks

    by jetpack
    Replies
    13
    Views
    1,701

    Needle Valve Assemblies

    The sloppy thread fit (air leakage) of the TD needle, and having to deal with that stamped steel needle spring for settings were not making me happy. I found that a small section of Great Planes...
  18. Thread: Cox Reworks

    by jetpack
    Replies
    13
    Views
    1,701

    -Adapters

    Thanks George,

    Sounds like I could just order the head assembly all from Norvel, which also means two choices - the std. button and glow plug head. These thread right into a Cox cylinder? Has...
  19. Thread: 1/2 A DF

    by jetpack
    Replies
    13
    Views
    3,340

    Kit Templates

    Keeping the kit as close to its originial condition, copying the kit is what I had in mind. It can almost be done by using a copy of the drawing for tracings, but difficult. There would have to be...
  20. Thread: Cox Reworks

    by jetpack
    Replies
    13
    Views
    1,701

    Cox Reworks

    Sure does. Thanks. Now I can refer to a head that I have that shares the same combusion shape as a Texaco head while I hunt for one, preferably burned out to spare the cost of a good one to machine...
  21. Thread: Cox Reworks

    by jetpack
    Replies
    13
    Views
    1,701

    Glow Head Options

    Since most of the performance gain seems to be in the head design ( I suppose after compression ratio and fuel) what are the different possibilites of glow head choices for a TD?

    I know of only...
  22. Thread: 1/2 A DF

    by jetpack
    Replies
    13
    Views
    3,340

    1957 Berkeley Models Inc., "SKY-RAY"

    I remember that article with the A-10 and the two cut props. They suggested stacking them together. I thought that would have been kinda hard on the motors if you didn't run a bushing through them...
  23. Thread: Cox Reworks

    by jetpack
    Replies
    13
    Views
    1,701

    Keep em' comming!

    The ducted fan that I plan on using the TD in is a 1957 Berkeley F4D-1 Skyray kit that I have mint in box that I am going to copy and convert to micro-R/C. It was supplied with its own stamped...
  24. Thread: Cox Reworks

    by jetpack
    Replies
    13
    Views
    1,701

    Cox Reworks

    What are some hop-up tips for a TD? I plan on trying out a TD as a ducted fan engine and would like to get the maximum rpm's and power out of it without hurting its longevity too badly. It will be...
  25. Thread: 1/2 A DF

    by jetpack
    Replies
    13
    Views
    3,340

    1/2A Ducted Fans

    In my first thread for the 1/2A topic, I mentioned there were a lack of impeller options available to suit the Skyray 1/2A kit that I'm working with.

    After brousing through a few web pages, I...
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