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Official Freewing JAS 39 Gripen 80mm EDF Jet
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Originally posted by Evan D View PostYou installed a 90mm fan? Have you flown it yet?
yes, i maiden flight 10x with different batteries 5.5k, 6k, 5k, for 2.5 minutes and 15% @end
its fast and heavy. descent quick, very little glides characteristic, alpha/flare in landing
lost control easily, always powered or need more cruising speed than normal.
using gyro but worse than with 80mm. set up is same in the book.
may be im wrong in my observation. need to try more flight.
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Tested the Jetfan today. The plane still flew fine with CG 24mm aft from factory marks on the wings. The jet clearly had more power but I also noticed that closing the cheater with the net made the gain not as significant as it could be.
The bad news is that I crashed, as I drained the battery in bare 3min of use. I didn't even push the jet hard through the flight as I was testing it, so clearly, the 8S 3Ah packs are kinda limited for this setup, despite being perfectly fine on the Eurofighter running a 90mm fan. Cells came down at 3.2V, my bad.
The good news is that I kinda managed to drop the jet on top of some bushes and the damage was minimal.
:/
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Originally posted by Mtpisgah99 View Post
yes, i maiden flight 10x with different batteries 5.5k, 6k, 5k, for 2.5 minutes and 15% @end
its fast and heavy. descent quick, very little glides characteristic, alpha/flare in landing
lost control easily, always powered or need more cruising speed than normal.
Looking forward to some flight footage if it is available later.
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Originally posted by Airguardian View Post
The bad news is that I crashed, as I drained the battery in bare 3min of use. I didn't even push the jet hard through the flight as I was testing it, so clearly, the 8S 3Ah packs are kinda limited for this setup, despite being perfectly fine on the Eurofighter running a 90mm fan. Cells came down at 3.2V, my bad.
The good news is that I kinda managed to drop the jet on top of some bushes and the damage was minimal.
:/
Good to hear the damage was minimal and looking forward to hear more about your new setup as you get it back in the air.
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Originally posted by Airguardian View PostDesigned them together with dad. Told him what I wanted, he made a concept, I improved it substantially with a few ideas and then he built it.
Can't complain!
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Originally posted by Tigerman View PostAnyone know what rockets/missiles will fit on the Gripen 's wing tip
Sidewinder at 1/9 scale for Freewing Gripen. Lug fits the keyhole in the wingtip rail. The mid section has breakaway support at the base to stabilize during upright printing. They look like fins with pads at the base. They can easily be removed after printing. Suggest printing lug solid for strength, 15% infill for the rest.
1:9 scale IRIS-T missile with lug to fit Freewing Gripen wingtip rail. The nose section has some breakaway parts that look like fins to support it upright while printing. These are not part of the missile - remove after printing. Will need supports. Underwing pylons at https://www.thingiverse.com/thing:4713773
There are also underwing pylons posted.
These are a modified versions of the missile pylons by Bettsmums. These have their own mounting hardware. The lug and socket are the same as the Freewing standard. and should be printed separately with high infill for strength. The main body needs to be light - I used 10% infill. A socket is also placed under the wing so the rail can be removed. Depending on the accuracy of the printer, the lug and socket may need to be trimmed to make a good but not loose sliding fit. Be aware that there are small differences between the inner and outer pylons. They go immediately ahead of the bulges on the underside of the wing. Bettsmums' original is at https://www.thingiverse.com/thing:4708956
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Originally posted by TangoVector View PostWow, you take the scale realism to new heights by re-enacting the 1993 Gripen crash at the Stockholm water festival
Originally posted by russ t View PostSorry, I can't find the racks you are referring to. Perhaps becoming blind ( which is not good for RC). Please could you post a link or post #. Thanks.
https://www.hobbysquawk.com/forum/rc...273#post296273
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Originally posted by Airguardian View Post
Designed them together with dad. Told him what I wanted, he made a concept, I improved it substantially with a few ideas and then he built it.
Can't complain!
Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
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Originally posted by russ t : Sorry, I can't find the racks you are referring to. Perhaps becoming blind ( which is not good for RC). Please could you post a link or post #. Thanks.
Airguardian replied: #1596 https://www.hobbysquawk.com/forum/rc...273#post296273
Thanks Airguardian. I realize now that Firefox for Android was not showing me the pictures, even if I logged into HobbySquawk. With other browsers ok.
Cheers, Russ.
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Originally posted by TangoVector View Post
Thanks for the info and video, what is the all up mass with your setup? I have planned to shoehorn the FMS 90mm that will add 200 grams and an 8S 3300mah combo will weigh as an Admiral 6S/5000. So I'm hoping I will not be too heavy for high alpha stuff. Some weight will be gained after carving out foam and mounting a 3dp thrust tube. Any other things you have learned?
Looking forward to some flight footage if it is available later.
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Originally posted by Airguardian View PostTested the Jetfan today. The plane still flew fine with CG 24mm aft from factory marks on the wings. The jet clearly had more power but I also noticed that closing the cheater with the net made the gain not as significant as it could be.
The bad news is that I crashed, as I drained the battery in bare 3min of use. I didn't even push the jet hard through the flight as I was testing it, so clearly, the 8S 3Ah packs are kinda limited for this setup, despite being perfectly fine on the Eurofighter running a 90mm fan. Cells came down at 3.2V, my bad.
The good news is that I kinda managed to drop the jet on top of some bushes and the damage was minimal.
:/Freewing A-10 turbine conversion: http://fb.me/FreewingA10TurbineConversion
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