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  1. #26

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    RE: Diamond Dust Lives!!!

    Screw-In

    I thought I would post an update. I didn't like the way Magneto's top vinyl looked so I tool it off and got new for it. I will post pics of it soon, but she's not ready yet. Magneto is still coming alone nicely.

    I've been doing some work on the Hell Raiser. This is the one we took 2 inches out of the middle and decrease the total wing area by 48 square inches. Because of this we are not only having to install the radio gear diffently, but also having to do install all of the gear prior to covering and seal it all up inside. What joy.

    As you can see from the pics we are going with a single fin with rudder on this one. The rudder will swing behind the elevons. More to come soon.

    Screw-Out
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  2. #27

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    RE: Diamond Dust Lives!!!

    Had two DDs with a K&B 28. Plenty fast for me (senior senior citizen). Easy to build, easy to fly. One thing I noticed was they both more or less exploded in the air. I think the covering got a small rip, allowed the high pressure air in, and The End. Should have checked them carefully after each flight. Nice airplane though.

  3. #28

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    RE: Diamond Dust Lives!!!

    Screw-In

    Wow, your are right, those K & B 28s are great motors for the DD. Very light weight and strong! You are also right about the DD exploding occasionally in air. It happen to me once as well. It doesn't happen often, but when it does, it the pilots fault, not the planes.

    The DD was designed to be a simple, easy to build, combat plane in the 80s. As a side note to the point: In the 80s, if you flew, you built what you flew, and the DD was about as easy as it got. As a builder, you had to be carefull not to build in a wing twist, and if you did, you had to have the covering skills to untwist what you built. By the same token, if you built it straight, you had to be carefull when you covered, not to twist the airframe. In the 80s covering was Monokote or Monokote. Monokote is not the easiest covering to work. It wasn't very strong iether. But they got some great colors don't they?

    Ultracote is a much better covering to work with, stronger and more durable IMHO than Monokote. The DD airframe is light and strong. The covering is a key element of the airframes strength. The covering is also "The" flying surface. Because the covering is so important, it is the responsibility of the pilot to take care of it and maintain it properly.

    I am sorry you had a bad experiance with them. If you are interested, maybe I can help you with a third that won't explode (providing you do your part and not land on asphault or gravel)

    I am working on a more build freindly version that will help the builder assemble the aircraft easily and square.

    Send me a PM if your interested in another.

    Screw-Out

  4. #29
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    RE: Diamond Dust Lives!!!

    DO NOT USE MONOKOTE !!!!

    The DD assembly instructions call for Ultracote.

    The reason is that it is stronger (thicker) than monokote.

    Over those large open bays moneycote tends to tear.

    And it is best to seal all the edges, I used monokote's TRIM SOLVENT.

  5. #30
    combatpigg's Avatar
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    RE: Diamond Dust Lives!!!

    I don't remember what I used to cover my first Diamond Dust....but it sounded like a snare drum at certain speeds. Never have duplicated that sound, it was like the covering was echoing the vibrations off the pipe.
    WHO GUNNA FEED MAW KEEEIDS..???

  6. #31

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    RE: Diamond Dust Lives!!!

    Screw-In

    If anyone is interested in one of these Deltas, I got plenty of laser cut parts and can put some short kits together. Send me a PM.

    Screw-Out

  7. #32

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    RE: Diamond Dust Lives!!!

    I have been trying to locate a good source for the carbon fiber, and epoxy glass tubes used in building the Diamond Dust.
    I would appreciate a lead to a supplier of the tubes needed for DD construction. Maybe different tube sizes must be substituted.

    .300 OD X .250 ID Epoxy Glass Tubing
    .350 OD X .250 ID Carbon Fiber
    .350 OD X .300 ID Carbon Fiber

    I have found suppliers that had one size but not the others.

    Greg
    You really only own what you can carry at a full out run.

  8. #33
    combatpigg's Avatar
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    RE: Diamond Dust Lives!!!

    MJD was kitting his Screamin' Demons with arrow shafts.
    I used to buy my tubes from a kite supply shop.
    Aerospace Composites might be worth a look.
    Midwest Balsa and Lonestar Balsa carried tubes IIRC.
    WHO GUNNA FEED MAW KEEEIDS..???

  9. #34

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    RE: Diamond Dust Lives!!!

    Screw-In

    I use these guys. http://www.goodwinds.com/index.shtml I like using the FL 370 which they are out of at the moment and the E-40 for the L.E. and main Spar tips. The FL 370 comes 54 inches and they cut it for me 18 inches each. I get 1 1/2 birds per rod. and two E-40s per bird. you gotta sand the E-40 a little bit to get it into the FL 370.

    You probable are not gonna find an exact match to what the plans call for.

    Screw-Out

  10. #35

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    RE: Diamond Dust Lives!!!

    Screw,

    I have all my tubes ordered, and got the unpleasant task of cutting a set of ribs out of the way.

    Thanks again for your help,
    Greg
    You really only own what you can carry at a full out run.

  11. #36

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    RE: Diamond Dust Lives!!!

    Screw-In

    Update! Magneto is ready to fly. This DD was a challenge for me because this was my first Electric Scratch build, and my first attempt to Electrify a DD. Magneto is following the Superhero/Villian Theme and is Electric....Of Course. It has a MonsterJet Motor, 70amp ESC, 14.8 volt Battery, and a 7x5 prop. It weighs in at 1.9lbs (no Battery) and 2.5 lbs flying (with Battery). We will test fly tommorow.

    Screw-Out
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  12. #37

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    RE: Diamond Dust Lives!!!

    Screw-In

    More Photos... Btw, Up next.... Finish Iron Man, and start Aquaman!?! I know right! This is getting good, still looking for Wonder Woman, Hawkman, Green Arrow ect.

    Screw-Out
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  13. #38
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    RE: Diamond Dust Lives!!!

    Very nice!
    The pinstripe effect really brings the design to life.
    WHO GUNNA FEED MAW KEEEIDS..???

  14. #39

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    RE: Diamond Dust Lives!!!

    Well I've got two DD kits cut up and ready to go. Right now I'm just waiting for my rod order to come in.
    The OS 32SX in the kit picture hasn't been run since OS did a piston, sleeve, and front and rear bearing overhaul. It has never seen fuel. It is so tight of a pinch at TDC, you would need a prop to turn it over without a glow plug.
    The older 32SX on the test stand has many gallons of fuel through it. I ran it with an APC 8X8, on the Ultrathrust muffler, and tacked out at 17500. Sweet engines.

    Greg
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    You really only own what you can carry at a full out run.

  15. #40

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    RE: Diamond Dust Lives!!!

    Screw In

    Update!!! Magneto has test flown. Success!!! After a quick trim flight (Cause I build Straight), we put Magneto up against our glow powered Dust and to my Surprise, Magneto was faster than us...But not by much. I'm very pleased with the combo, and I'm guessing 140mph on the pucker factor.

    Here is a link to a flight video of it solo.

    http://www.youtube.com/watch?v=5E-NVjjkHfw&feature=plcp

    Screw-Out

  16. #41

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    RE: Diamond Dust Lives!!!

    I downloaded the PDF version of the Diamond Dust assembly manual. There are two things that are different from the manual that I received.

    http://www.diamonddustrc.com/Diamond...26-2009-01.pdf

    It shows using 1/4" carbon fiber strips to reinforce the vertical stab. This was not included in my kit.
    It also shows a motor mount doubler plate that would make the motor mount 1/4" thick. This was not included in my kit.
    Are these two things necessary?

    Greg
    You really only own what you can carry at a full out run.

  17. #42
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    RE: Diamond Dust Lives!!!

    I use balsa tristock and 2 oz fiberglass to reenforce the fins. I got very little use for carbon fiber on planes like this...except for the props. If the fins are also anchored to the bottom sheeting after they pass through the top...you can't do much better than that for good carpentry.
    If all you are running is a OS.32, 1/4" plywood is plenty for a mount, but I would make my own blind nuts with 1/4" of reach, or use aluminum plates underneath to spread the clamping force of your hardware.
    If you were running a Nelson engine or something nastier, then I would only use 1/4" thick aluminum plate mounts.
    WHO GUNNA FEED MAW KEEEIDS..???

  18. #43
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    RE: Diamond Dust Lives!!!

    I agree with CP on the glass. I usually cut a 1/64 groove around the edges and inset a 3/8 or so wide strip of ply to give me a nice hard edge, then glass it up. I also bag my glass fins.

    Definately go with the 1/4 ply doubler.
    A guy who used to live on this site and now is rarely here due to the "upgrade".
    Most likely fading away till the My Forums is fixed. Too bad.

  19. #44
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    RE: Diamond Dust Lives!!!

    Vic's tip to slit the perimeter of the fins and then insert strips of 1/64" plywood is well worth the effort. It gives a nice hard, centered edge that you shape the fins down to.
    You can make a tool out of layers of plywood that clamp a #11 Xacto blade on center and at just the right depth to make quick work of cutting the slit along the perimeter of the tail parts.
    WHO GUNNA FEED MAW KEEEIDS..???

  20. #45
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    RE: Diamond Dust Lives!!!

    Or you can buy a dremel blade and mount it in your drill press.
    A guy who used to live on this site and now is rarely here due to the "upgrade".
    Most likely fading away till the My Forums is fixed. Too bad.

  21. #46
    combatpigg's Avatar
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    RE: Diamond Dust Lives!!!


    ORIGINAL: vicman

    Or you can buy a dremel blade and mount it in your drill press.
    Serious..? 1/64" cutting tool..?
    WHO GUNNA FEED MAW KEEEIDS..???

  22. #47
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    RE: Diamond Dust Lives!!!

    Yep, it's a little steel cutting saw blade. Goes in the cut-off wheel shank and then mount it in the drill press. I put a sharpie mark about 1/2" in from the edge. Lock the quill on centerline of your workpiece and walk it all around.
    I use wood glue to fix the ply in place that way it sands nicely to a sharp edge on the TE.

    If you look closely at these pics you can see how the ply feathers in at sanding.
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    A guy who used to live on this site and now is rarely here due to the "upgrade".
    Most likely fading away till the My Forums is fixed. Too bad.

  23. #48

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    RE: Diamond Dust Lives!!!

    Screw-In

    You are the victim of a time warp, and you have dated your kit. Prior to Jeff Gilbert Sr. death, what you have kit wise, is what I call a 1st generation Dust. The fins are just 1/8 balsa with a 1/8 square wraped around it and you mount is a single 1/8 aircraft ply. Your carbon tubing (spar) and fiberglass L.E is also different. IMHO, you have the better dust. Very light wieght, strong, and as long as your not using a Jett or Nelson motor, you will be fine.

    The second Generation Dust came with a Motor Mount Doubler, carbon strips for the fins Stiffer sparing and L.E. You also get with the second Generation a plywood switchplate (1st Generation, you just mounted the switch in the top sheeting same location).

    One of the great thing IMO about a dust you your freedom to try different things construction wise as mentioned above by fellow posters. On my reqular dusts using common 25-40 motors I pretty much build it as planned. On my higher performing dust I like to iether fiberglass the fins as mentioned or (my favorite) sandwich a sheet of 1/64 ply in between 2 sheets of 1/16 balsa and make my fins out of that. This gives me a strong fin with a super sharp L.E. and T.E.

    Screw-Out

  24. #49

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    RE: Diamond Dust Lives!!!

    Right you are, this is an older kit. I bought it in Feb of 2005. The kit was $65.00 at that time.
    I like the idea of laminating 1/64" ply between two 1/16" pieces of balsa sheet. I'll also go ahead with your suggestion to glass the fins, and glue in a 1/8" doubler on the motor mount plate.
    How far back do you taper the vertical fins from the front and rear of the part?
    I have a YS 45 I will probably be putting in one of my Diamond Dusts after I get use to the speed.
    Thanks to all for your input to my questions.

    Greg
    You really only own what you can carry at a full out run.

  25. #50
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    RE: Diamond Dust Lives!!!


    ORIGINAL: OldRookie

    How far back do you taper the vertical fins from the front and rear of the part?
    I have a YS 45 I will probably be putting in one of my Diamond Dusts after I get use to the speed.
    Thanks to all for your input to my questions.

    Greg
    I wail away on those fins with a T sander until my tiny little girlyman pipe cleaner arms are trembling with exhaustion..then call it good.
    If you haven't worked with 1/64" ply before, it's a good idea to sand it before gluing it. It has a shine that repels glue. This is true of most aircraft ply that sits around.
    WHO GUNNA FEED MAW KEEEIDS..???


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