Seaplanes Aircraft that typically take off and land on water...radio control seaplane discussions are in here.

Turbine powered WETJET

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Old 01-04-2016, 07:50 AM
  #26  
Vettster
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Originally Posted by Square Nozzle View Post
Trevor, what's with the prop and spinner? You wouldn't degrade your intentions and eliminate the turbine would you? Shame on you!
Lol...no...I've always said there would two versions...electric first an then turbine after the electric has proven to fly.

Cheers
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Old 01-12-2016, 06:06 AM
  #27  
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Its a SNOW DAY!! YIPPII

My dad is still building strong at 82. Here he's finishing the wings of a 12' ws super cub.

In the photo of the wing.. I use what is called a Guide Coat. A very light dusting of a darker paint is spayed on the surface and then sanded away. What ever remains dark is a low area and must be filled with light bondo.
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Old 01-30-2016, 01:43 PM
  #28  
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Started making the first set of molds

Wingtips first.

Finish thickness will be 1/4"
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Old 01-30-2016, 03:22 PM
  #29  
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The bottom edges on the floats should be sharper, otherwise the water will wrap itself around the float creating unnecessary drag.

Last edited by LADDIE; 01-30-2016 at 03:26 PM. Reason: missing the space
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Old 01-30-2016, 05:28 PM
  #30  
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Thanks Laddie.. But your seeing the top in the photos. The bottoms are razor sharp
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Old 02-10-2016, 05:30 PM
  #31  
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Sorry.. forgot to post an update. After much swearing and smashing... the plugs finally released from the molds. Im very pleased with the results. Just as I wanted to keep going with the mold making process.. then work gets busier again. Figures lol
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Old 02-15-2016, 10:10 AM
  #32  
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It was -40c windchill this weekend.. Never left the house

Did manage to get the molds done for the rudder. onto the ailerons today.

Im not really controlling this.. its what ever comes off the assembly line first that gets the molds lol

Sorry, not sure what game RCU is playing with the photo uploader. Click on links
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Old 04-23-2016, 09:01 AM
  #33  
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How is the wet jet coming along?
By the way, Laddie is absolutely right. You NEED sharp edges on that hull to cast off the water and throw it out.
I would go even further and advise you to fit spray strips sticking down from the edges to throw the water down.
Your original curved edges would have drawn the water upwards along the surface and thrown it up into the air. And you know what Newton's third law says. If you throw the water upwards, it will pull the hull downwards (equal and opposites).

Spray strips turn the water spray down and help lift the hull out of the water

The photos show two versions of my water delta, 46" span with either an Irvine 53 or a 5S 700 watt brushless.

The foreplane can be used as an airbrake incidentally when tilted up to a well-stalled angle. Might be useful for a turbine version of your model to overcome the residual thrust at idle. Or do you have some other kind of airbrake?
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Old 04-23-2016, 09:32 AM
  #34  
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Thanks for asking Alasdair..

It will soon be flying season here, and I needed time to build another jet for the season (xcalibur) This kinda side tracked me for a bit as there was something about the model I wasnt to keen on and decided to make a plug and molds for it.

Normally I would just pack it in for the summer with regards to the WetJet.. but I think I have all my other planes in order now and I would like to continue on with the WetJet build when time allows ( I work long days) I am also seeing the high cost of epoxy molds.. and can cut that cost in half with the larger components using polyester now that its warming up and I can work in the driveway.

Thanks for your advise on the edges.. I have sharpened all water edges as suggested by Laddie. Failing that.. I will do as you suggest. Keep in mind all this must come out of a mold, so the strips you mention would be an after attachment.

So... I haven't really stopped... just slowed down for a bit
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Old 04-23-2016, 09:41 AM
  #35  
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I know about being side-tracked.
I started building this jet seaplane in July 2013. I finished this fuselage/hull/wing stub part to exterior glassing and then got stuck on how to mount the twin fins.
Must get back to it.
It is built upside down, btw
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Old 04-23-2016, 10:59 AM
  #36  
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Nice! What even sweeter is having your own CNC Laser
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Old 11-20-2016, 03:08 PM
  #37  
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Well it snowed today.. Back to the build

Man its funny how you don't want to do things sometimes (builders wall) but when you start, it just feels so Good!!

Really happy to be back at it. So I figured I would start with the more difficult parts.. The ailerons as they are very thin at the trailing edge. But now that the parting box is made and the plugs are in.. it wasn't all that bad. Got as far as the tooling coat. Maybe layup one side of the mold tonight.
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Old 11-21-2016, 06:37 AM
  #38  
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Vettster, I think we all know about the "Builders Wall". I have several planes in my shop that got started and then set aside for one reason or another. My Turbine Northstar is still waiting for paint prep and finish after repair from a unscheduled incident a few years ago. I crashed my Seawind last summer (total loss). Found a new, in the box (without the box) Seawind and I'm building that to my specs. Like a new color scheme, sharpening edges and relocating the rudder and stab servos to the interior. I really dislike seeing the servos sticking out of the fuselage or wing. Even with that project, I have to commit myself to doing just a little every day so I can have the plane ready for spring.
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Old 11-27-2016, 07:49 AM
  #39  
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Hi John

I only have time to build on the weekends and thats only if I have Saturday off.

Today we are cracking open the aileron molds.

First I cut off the ruff edges from the first side, and then I built a new box so that I could layup the second side. Having the walls as part of the mold really increases the strength of the mold and stops warping.

Finished last night and will open this morn
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Last edited by Vettster; 11-27-2016 at 07:52 AM.
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Old 11-27-2016, 05:40 PM
  #40  
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Molds are good to go! Onto the wings
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Old 12-01-2016, 11:58 AM
  #41  
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Sanded down the 2 pak primer.. Now im using the much easier rattle can scratch filler primer.

Looking a bit like an F-22 at this point
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Old 12-01-2016, 12:33 PM
  #42  
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Nice!
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Old 12-02-2016, 11:01 AM
  #43  
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Thanks!

Just a couple of imperfections to correct.

It's not hard to tell the UPS guy came. They must be playing hockey with my gallon of resin. So freaking typical of UPS.. GOD I HATE THEM! But that's the carrier they use
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Old 12-03-2016, 11:47 AM
  #44  
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Sanded down with 180 . Primed again and will be sanded with 280 next.
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Old 12-03-2016, 04:04 PM
  #45  
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Ohh it's getting good now..

Masked out the canopy, speed break and rear hatch. One more coat of primer and then it will be sanded down with 400,600,800 grit
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Old 12-04-2016, 02:59 PM
  #46  
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Ton of sanding done today./.. All the fine sanding will happen tomorrow and then it WAX time
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Old 12-10-2016, 04:21 PM
  #47  
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Here I am adding the rear spar. This will eventually become two spars with threaded ends so as to hold the wings on. But for now it is one solid piece for alignment purposes.
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Old 12-11-2016, 07:35 AM
  #48  
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Just Winging it...
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Old 12-12-2016, 08:48 AM
  #49  
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Wing mold all glassed up with an air connection to make the plug and parts easier to remove.

I wasn't planning on removing the plug till today...but the resin cured very fast under the heater last night so out she came.

I was all prepared for a fight...but with little effort she came right out
. Needs a bit of cleaning up, an then the plug goes back in and the process is repeated.
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Old 12-18-2016, 12:55 PM
  #50  
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here we have the other side of one wing waxed and ready for the other side to be laid up. This has already happened and I popped it out today. Last night I went ahead and layed up the wing tips. This has a carbon fiber bottom and let me tell you!! Dont mess with it to much cause carbon fiber is like a thousand tiny needles. Make a template and cut it once! I have made templates and will keep them in the file for future builds. I then roll up a page from the MAAC magazine and use that to evenly distribute the cabacil into the corners. No air bubbles permitted here
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