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90mm EDF "COUGAR", convert to a sling shooter.

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90mm EDF "COUGAR", convert to a sling shooter.

Old 06-23-2019, 01:34 AM
  #1  
Joseph Frost
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Default 90mm EDF "COUGAR", convert to a sling shooter.

Latest bargain I found in 2nd. hand classified to make use some of my 90mm units laying around after being upgraded to higher voltage.
To keep it light I start with 6S set up, eliminating any excessive weight with an easy full proof catapult shoot.


Start with 6S power set up, easily upgraded to 7,8 or 10 if needed.


Improvement of air intakes and outlet duct.
.

Making the whole Rudd/El ass. removable-


-by sliding on with the use of CF rods.


Out of whack El. spar re-alignment.
Old 06-28-2019, 03:54 PM
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Joseph Frost
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Catapult skid hook and wing stab. fins fitted.


MG servos properly secured by epoxy after proper prep of bond surface.


Arrestor probe well secured to the fuse.


First warm up to check the figures.


Final control hook up.


Quick thrust check.


Main wings fitted.


Properly sealed off exhaust duct.


Whole tail ass. made removable for future access.
Further progress with the assembly, after fitting the simple mop up l/gear I have checked the static thrust figures, at 2.75 kilos on 6S, so model will move nicely at 2.4 Kwatt with slightly higher current draw. Still lot of little fiddly jobs to finish it off for enjoyment of flying it.
Old 07-06-2019, 10:36 PM
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Joseph Frost
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All cavities properly sealed off.


Sorting out the final batteries position.


Range check positive on the wet day out flying the Hawk.
Ready for flying action after successful range check. Only waiting for the wet spell to settle a bit.
Old 07-17-2019, 12:24 AM
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Joseph Frost
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After the maiden's disaster.
Yesterday's maiden catapult launch ended in total "katastrofy", somehow I have totally stuffed up with the center of gravity, model being so tail heavy that after rotation it went strait up to 90 degree vertical. After bit of stick battle I managed to slam it down belly flat with no frame damage beside the broken canopy from the battery displacement.
Looking forward to my next launch.

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