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Turbine powered WETJET

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Turbine powered WETJET

Old 10-27-2018, 03:46 PM
  #101  
Vettster
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Just snooping to see if the photo uploader has improved lol This photo is from last year. Was working on the engine pod molds. All molds were finished last winter.

Last edited by Vettster; 10-27-2018 at 03:48 PM.
Old 10-29-2018, 11:05 AM
  #102  
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Great to see it back again. I am building a self design "dry" jet.
Old 10-31-2018, 05:27 AM
  #103  
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Originally Posted by nilsreinert123 View Post
Great to see it back again. I am building a self design "dry" jet.
Hey Thanks nilsreinert123.. I checked out your build and it looks great! A very good start. That was in Sept so you must have come a long way since then. You need to update your thread
Old 11-01-2018, 08:34 AM
  #104  
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Thanks Vettster ,nice to hear. Yes i have to update my thread soon !
Old 11-30-2018, 03:46 PM
  #105  
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Finally home long enough to open the mold... I have a fuselage!! Name:  smile.png
Views: 358
Size:  819 Bytes Very happy with the results.

Weight so far...
2 wings...1273
2 Horizontal stabs..654
Fuse..2155
Total...4082 grams or 9 lbs

Still have to include the vertical stab,wing tips and ailerons..so possibly under 12 lbs. Much lighter than I expected. I was figuring about 15 lbs. The wings will be made much lighter in the future as I have redesigned my method for holding the wings on.
Old 12-30-2018, 01:57 PM
  #106  
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Well Holy Smokes these forums are dead!! Not much point in posting here anymore.
Im ready to begin assembly of the WetJet as all the construction of parts and formers are finished. Hope to have it ready for a maiden in about a month or two, as its time to return to work and killer long hours, so not much time to build. Check out the Assembly and Maiden over at RCGroups.
https://www.rcgroups.com/forums/show...0#post40795839
Old 01-03-2019, 01:38 PM
  #107  
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I've been following you progress all along and I remain impressed with your glass work. I may have mentioned this before but now that you near getting that bird wet I'll repeat myself. A couple of years ago I built a 125% NorthStar. I put twin vertical stabs on it and mounted the turbine on the to of the fuselage. It was a sleet looking plane on the water and took a good distance to get on plane. When it did break free of the water it took off like a shot, totally out of control, followed by a big splash. The root cause of the problem was me. I was not very familiar with delta wings and full span ailerons. There was much to much aileron throw leaving the roll axis very sensitive to the point that I couldn't catch up with it. Lesson learned and transferred to you. My guess is you will encounter the same, so dial in very little aileron throw to start with and have more throw available via the rate switch if you need it.
Old 01-03-2019, 04:12 PM
  #108  
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Hey John! Good to hear from you again. Yes Ive been aware of how sensitive Deltas are for some time now. Im forever telling the nubs who show up at the field with a Delta to maiden, to dial down their ailerons from 2" to 2mm LOL. Thanks though! I do appreciate any help you can throw my way... and thanks for the kind words.
Here's an old vid of my first delta for your entertainment. Its got a great ending so watch it in full.

Trevor
Old 01-09-2019, 01:18 PM
  #109  
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On my Lochstar design (a development of Laddie's great NorthStar) the wing control surfaces were elevons.
[I found on some Northstars I flew previously that elevons gave much better pitch control than the elevator alone.]

I set the aileron authority at 5 to 7 degrees on high rate, and the elevator authority at double that.
Old 01-11-2019, 02:08 PM
  #110  
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Thanks alasdair.. I will keep that in mind and try it after a few flights.

Trev
Old 01-19-2019, 03:04 PM
  #111  
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Just need to run ESC wires.
Install battery tray.
Rx.
Do the CG.

And then I guess maiden the darn thing.


For Scale reference... Im 6' tall
Old 01-20-2019, 09:51 AM
  #112  
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Looks great !
Old 01-21-2019, 08:46 AM
  #113  
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Hey Trevor, those aileron servo covers look very close to what I made for my Turbine NorthStar. Have you been in my work shop? Great minds think alike.
Old 01-21-2019, 12:29 PM
  #114  
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Originally Posted by Square Nozzle View Post
Hey Trevor, those aileron servo covers look very close to what I made for my Turbine NorthStar. Have you been in my work shop? Great minds think alike.
Ha! Sorry to hear you spent time working on them.. I got em at Alibaba, 20 sets for about 30bucks

Today I got the CG set..(im not working outside in -35 windchill thanks) Not surprising that I had to add about 2lbs to the nose. Total takeoff weight with the electric version is 22.5lbs Pretty much the exact same as a Sprint jet however the Wetjet has a MUCH larger wing area and will carry twice that much weight if need be. lol Name:  wink.png
Views: 249
Size:  802 Bytes

Keep in mind that the next one out of the mold will be even lighter as I have redesigned the wing attachment method and that the Horizontal stabs will be much smaller. I do realize how huge they are Name:  sneakiness.png
Views: 251
Size:  683 Bytes lol Seemed like a good idea at the time
Old 01-27-2019, 02:36 PM
  #115  
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I installed the final part today..the keel. Yippee! Programmed the plane and ran the motor. All systems are go for the maiden when weather is permitting Name:  smile.png
Views: 239
Size:  819 Bytes. I for one..(for the first time I can remember..)was happy to see the snow today. Lol

I used a soft squeegee that is used to spread epoxy. I was really planning something more elaborate like a spring loaded keel that would spring in and out of the rudder.. but at this point I just want to get it in the air.

Im actually excited about starting on the next one as I can implement the improvements that are needed.

Smaller stabs
Painted in the mold.
Lighter engine pod and wings.
Moving the servos in the wings and tail forward.. etc.. All learned from the prototype.. hey! that's why we make prototypes Name:  wink.png
Views: 237
Size:  802 Bytes
Old 01-28-2019, 07:38 AM
  #116  
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Trevor, are there seals in the pushrod exit housings to prevent water from entering the interior? I know water will not get in when the plane is in motion. Just don't stop! I found some accordion style seals that we used in our racing boat radio boxes. They seal tight around the pushrod and mount to the rear face of the exit housing. But then, I'm sure you have that covered.
Old 01-28-2019, 10:20 AM
  #117  
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Yeah man!..im very interested in the seals you mentioned. I was going to use foam rubber but like your idea better. Link pls
Old 01-29-2019, 07:42 AM
  #118  
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Trevor, try this link and you'll see a typical R/C Boat radio box pushrod seal.
https://aeromarinercboats.com/products/radio-box-seals
Old 01-29-2019, 08:13 AM
  #119  
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hmmm.. kinda stuck with a round seal fitting inside a square hole though..lol I got some time to think about it since a foot of snow just dropped

Im also using CorrosionX on all the hinges, hatches etc. Have you heard of it?.. Im probably going to stick with the foam rubber soaked in CorrosionX

Video here...
Old 01-29-2019, 09:35 AM
  #120  
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Another option Trevor. I used this style on my Turbine NorthStar.

https://www.fishpond.com/Toys/Pushro.../9999655438921
Old 02-02-2019, 06:46 AM
  #121  
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I don't believe you Trevor. After accomplishing what you have with your Wet Jet you're trying to make me believe that you can't put a round peg in a square hole!!

That Fishpond web site doesn't open using the link I sent. A place called Graves RC has the other style seals I mentioned.
Old 02-08-2019, 02:11 PM
  #122  
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Originally Posted by Square Nozzle View Post
I don't believe you Trevor. After accomplishing what you have with your Wet Jet you're trying to make me believe that you can't put a round peg in a square hole!!

That Fishpond web site doesn't open using the link I sent. A place called Graves RC has the other style seals I mentioned.
LOL Oh man! I just cant get my head around the physics Thanks for the links.. but im going to stick with my original idea for now.

Looks like the maiden will happen this Sunday..though without snow A foot of it all melted last week in two days. Hoping to at least get an inch overnight or it will be mud based.
Old 02-08-2019, 06:51 PM
  #123  
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We have the same down here in Connecticut. Mud since a warm shot a few days ago. I fly my sport jet (Facet) at our field but now the ground is so soft the nose wheel can dig in on landing and the plane ends up on it's back. NOT NICE!!
Old 02-09-2019, 07:14 AM
  #124  
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Trevor, I think I know what you're not understanding about the push rod seals. When I built my housings for the push rod exits I installed a "Bulkhead" inside the housing that has a hole through it. The seal mounts to the back side of the bulkhead and can be out of sight depending on where the bulkhead is located. The hole in the bulkhead is large enough to allow the push rod to move freely while leaving enough surface for the seal to mount.
Old 02-12-2019, 07:12 AM
  #125  
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There ya go John! All I needed was the answer lol. Thats a pretty good idea. I think I will give that a go.

No maiden yet Nothing but hard bumpy solid sheet of ice. Where getting about a foot of snow today though. Hope it will stay long enough till the wind drops off on a weekend that I dont have to work! grrrrrr

In the meantime Im making the new Smaller horizontal stabs.

Last edited by Vettster; 02-12-2019 at 07:15 AM.

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