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"EDFHydroPropJet", latest project by JF Jet Studio

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"EDFHydroPropJet", latest project by JF Jet Studio

Old 05-08-2020, 11:40 PM
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Joseph Frost
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Default "EDFHydroPropJet", latest project by JF Jet Studio

Last couple of days came up with another idea to build something different again, with appropriate tittle "EDFHydroPropJet" after having so much of fun these days flying my water planes. After few more design drawings I'll decide which one I fancy most and if I go for Delta/Elevon or conventional control set up. Managed to find all the bits and pieces in my spares box to build it which is a great plus. Pictures tell thousands words.





Old 05-10-2020, 01:36 AM
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Little progress to start with, not to my liking so next cut will be domani.

Frame's too small, have to go bigger!
Old 05-11-2020, 02:03 AM
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New 25% larger layout on the way.





Old 05-16-2020, 02:31 AM
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Bit more progress coming along.





Old 05-18-2020, 12:40 AM
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Finish with the belly hull, ready to be thoroughly water proofed with numerous coats of sealers and paint, so it is back to the top half.




Old 05-22-2020, 12:38 AM
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Further progress well on the way.

Sealing off the hull.

Bit of colour added.

Work on the Elevon laminated tabs.

EDF power in place.

Rear support fins fitted and well reinforced.
Old 05-29-2020, 12:10 AM
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Few more pics to finish it off.







Old 06-07-2020, 01:46 AM
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Few more flights to trim it right and will have a go in the HO2.

After maiden beach trials.


Couple of flights with different set of batteries.

Old 06-10-2020, 12:43 AM
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Short footage of one of the trial flights from the grass field.
Old 06-17-2020, 01:07 AM
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The last CG check flight off the grass before water trials.
(EDFHydroPropJet final CG trials)

Old 06-20-2020, 12:43 AM
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First day out on the water.


Old 06-27-2020, 12:32 AM
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After some water trial runs it was too risky for water getting inside nacelle air intakes, being too low! Ripped them out and replaced them 4" higher and 2" forward to get more water clearance.
The first flight after this mod was bit of a handful compare to my original set up, so further experimental trial&error test flights on the way to sort out the instability problem.
Just love the challenge.

Replacement of EDF module to higher position.

Minor mod to get more salt water clearance.

New EDF module position.

Bit of handful the first flight, but only time will tell.
Old 07-07-2020, 11:49 PM
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Another test flight after some CG and TAs adjustments, lot more stable but the balance will have to be still moved fore. Lacking bit of power while running both power units only on low 3S voltage but more powerful motor is on its way.

Testing various motors.

Lower kv motor fitted and tested.
Old 07-13-2020, 11:29 PM
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Another more powerful motor fitted for further testing.


Old 08-14-2020, 01:25 AM
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A bi-product using left over bits and pieces of this creation. "A-10 flying wing type", not an EDF but great fun fly project after got it finally sorted out. Better in the air than in the trash bin.

Something different.

Left over bits.

After bit of innovations.

In action over the gully.
Old 10-16-2020, 01:48 AM
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After bit of break from the EDFHydroPropJet, back again, to finally test fly the new 4S powered Scorpion motor. Certainly livelier with more grunt, but still finding the model bit of a handful during turns after my re-position of the EDF power units 10cm higher to minimize water getting inside nacelle intakes.
Before further water trials I have re-set after my flying today flight controls from the Elevator assisted Elevons to standard two Ailerons with Elevator set up to analyze the difference.
For better or worse, only the time will tell.

Action day.

Now the prop runs on Scorpion 4S.
Old 10-21-2020, 10:33 PM
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After radio re-program to standard control set up I have done half a doz. of short level trial flights to test the response, still a handful even flipping the model upside after one landing with considerable damage.
All fixed, further re-set with much better result after few more trial level test flights today.
Ready for the flying field, unfortunately some wet spell is on the way so the garden fertilizing will be more appropriate. LOL.

Now under standard AIL/Elevator control set up.


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