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Old Jul 02, 2014, 01:19 AM
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Jet provost

Hi Dave,
Have you flown the Jetwelt JP?

Reuben
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Old Jul 02, 2014, 11:59 AM
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Hi Reuben, no I have not quite finished it, nearly there. I flew the smaller 1/6 scale one yesterday for the first time in its finished paint scheme, I really enjoyed the one flight I had, but had to stop due to some contamination in the main fuel tanks. It turned out to be silicon sealant that I used to put the overflow pipes in with so I won't be using that again.

Dave
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Old Jul 02, 2014, 12:08 PM
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Hello Dave,
Looks cool! Does that have a P80 in which case where did you locate it in the fuse?
Thanks for replying.
Reuben
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Old Jul 02, 2014, 12:39 PM
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It will not take a Jetcat 80 due to its size, it can take any turbine in the wren 54 size . I am using a wren 70 which has loads of power for it and it allows the use of con-formal tanks which have been designed for the kit.

Dave
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Old Jul 02, 2014, 01:50 PM
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Presumably the fuel tanks are on the CG and the turbine is just behind the tanks...right? Do you have any negative effects with no full intake ducting?

Reuben
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Old Jul 02, 2014, 02:38 PM
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The turbine is also on the CG with the tanks around it, the jet pipe is 900 mm long and we have no heat problems or need of ballast. I have done the same mod on the Jetwelt JP moving the turbine as far forward as possible on to the cg.

Dave
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Old Jul 02, 2014, 02:42 PM
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Nice setup! Congrats!
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Old Jul 07, 2014, 08:21 AM
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Quote:
Originally Posted by machine man View Post
Hi Reuben, no I have not quite finished it, nearly there. I flew the smaller 1/6 scale one yesterday for the first time in its finished paint scheme, I really enjoyed the one flight I had, but had to stop due to some contamination in the main fuel tanks. It turned out to be silicon sealant that I used to put the overflow pipes in with so I won't be using that again.

Dave
Just in case you were not aware, jet fuel, like petrol, destroys silicon which is why jet models use tygon and not silicon fuel tubing
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Old Jul 20, 2015, 02:43 AM
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Well its been a year since the last update on the JP, my 1/6 aircraft flies superb and those others that have built and flown it find it at ideal scale trainer, the Jetwelt has been flown but I have had an issue with the tail incidence with the elevator having 6mm of down dialed in for level flight. I tried moving the c of g forward which helped but it flew very sluggish on the controls and with the c of g at 25% it still had 3mm of down elevator dialed in for level flight. I have modified the tail and its just up to getting it back to the field for more testing.

how are all of the other projects coming along.
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Old Jul 20, 2015, 09:45 AM
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I believe JETWELT had two versions of the plane. I wonder if they fixed this issue in their final version.
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Old Jul 21, 2015, 02:31 AM
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Mine is the earlier version but it did have a lot of detail work on it which may of changed the original set up. She flies great and looks the part in the air, just carrying the extra weight up front spoils the way she feels especially in the turn.
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Old Jul 21, 2015, 04:24 AM
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I very much like the plane and have been tossing around of making one myself in that same size. However the thought of going through the process again puts me a bit off since I have been molding a full composite T-34 mentor plane and the process is quite laborious.

Reuben
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