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Official Freewing JAS 39 Gripen 80mm EDF Jet
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Originally posted by Pogo View PostDue to the extra weight of the cockpit the model still needed lead in the tail so I decided to attempt making the air (or speed) brakes functional and add useful weight. This looks pretty rough but some filler, paint, and covers will help- but at least it works!
I fooled around with the hinging and eventually put the bottom one outside the skin- not scale but it's the only way the panel would open. I don't think SAAB got it right...
Tom
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Originally posted by TangoVector View Post
I'm installing the 90mm FMS 8S, so I need a larger diameter thrust-tube and I think the 80mm version TV-unit will be too restrictive, but there will be some sort of TV later on. A lot of carving going on right now and a redesign of the cheater inlet is in the printer (not really a redesign, just printing another inlet from thingieverse to have something to start with as a baseline).
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Originally posted by Mtpisgah99 View Post
You might want to add this inlets. I use 90mm f16. You need to heat it and reverse curb it. Unless different location.
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Originally posted by Mtpisgah99 View Post
since you already curbed the speed air brake piece from the jet , i wonder if you can duplicate it from making a plastic material using 3d machine. if you can i'll buy a pair from you.
Tom
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Received my TV unit yesterday, took four days to arrive in Northern Ireland which is pretty impressive.
I fly off a grass field which has proven challenging to get an EDF airborne, could I ask forum members, would enabling the TV units for take off be advantageous or will I be asking for trouble. Anybody tried this yet?
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Interestingly I made and posted a couple videos earlier...
FreeWing 80mm Gripen EDF overview - YouTube
FreeWing 80mm Gripen EDF setup - YouTube
I fly with a DX-18 if actual number from that would help.
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Evan, could you go in more detail on how did you prepare the TV nozzle to glue the plastic cover on top?
I plan on following your steps for that. :)
Originally posted by Steve Balaam View Postwould enabling the TV units for take off be advantageous or will I be asking for trouble.
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Originally posted by Airguardian View PostI see now! :D
Nice!
Did you measure how much did the thrust increase?
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Progress report on my FMS 90mm conversion.
I'm going for a taper to approx 98% of Fan Swept Area at the rear for good static thrust, top speed isn't a priority. I have printed rings to give the tube correct size and shape. The tube in two parts is made of thick paper and will be lined with aircraft-grade extremely thin alu-tape for strength and some type of afterburner simulation, probably kallend s DIY version. Taper goes from 92mm to 81mm at the end, so a F-16 tail cone is on the way (yes I know, but it is close enough for me at this stage).I have opened up the cheater hole and will also add the F-16 side inlets on top as Mtpisgah99 suggested.
A lot of foam has been removed and the tail carbon-rods are too narrow, but I will put in other reinforcements. I'm trying to get airflow as smooth as possible on both sides of the fan so I'm planning to print a more aerodynamic cover for the carbon spar in front of the fan.
This is fun!
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