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Happenings - Fri 12 OctUMX Whipit update : 9.12pm Wing tip has been glassed , should be well and truly cured / dry by now .. Might be time to peg it . Hopefully wont have to Frisbee it any more in the future .. Not planning to launch it hard enough to rip the wings apart .. Hmmmmm !!!! Saw a video on youtube , laminating film ! Got my self a roll ( came today ) , ordered the thinnest film I could find ( 0.04mm ) Did a test on some really soft flexi foam I have ( same foam I tested the fiberglass on ) ... Impressive stuff .. Wonder if I should cover the Whipit's wings ? ( Looks like the top of the wing is getting surface stress fractures ) Free Flight Report Updated with some fun from the park . So I took the rubber powered and the Capacitor powered FF models to the park . When I started walking there was hardly a breeze .. As soon as I got to the park , the breeze picked up .. Rubber powered : Does not like the breeze at all .. ( Forget it ) Launching into the breeze the RPM would do a loop or a immelman . The immelman is preferable as you at least get some altitude and glide .. I would suggest perhaps some down thrust , maybe soak the wood and induce some down angle .. Other wise it just tries to loop .. You can tune the glide nice , but what it does under power ( and a breeze does not help ) Perhaps launching down wind ? ( Did not try that _ ) Capacitor Power : Almost the same deal here except the model would stall into the breeze , do a hard right , lose altitude and then fly ok . Serious issues launching into the breeze , just cant push through . So I increased the force of the throw ( like a baseball ) and VIOLA ... Nope still can't push thru the breeze , but now we have more altitude to play with . With a really hard throw , it would climb higher against the breeze , do a stall turn to the right .. Lost altitude - picking up speed as it did and then cruise in a right hand turn really well . Every time It turned into the wind , it would slow down , tighten the turn and continue on . I got in some really nice flights this way till the breeze increased in strength . A) You really want to play in near dead calm conditions or indoors ( especially the rubber powered model RPM ) B) The location of the charge port on the Capacitor model is a bit of a PITA C) 2 seconds of charge was plenty for some fun - especially in the prevailing conditions . D) The capacitor model did impress .. The RPM was a little disappointing and I may convert it into a chuck glider as it does glide very nicely . What's happening .. ( No fly ) First lets go back in the wayback machine about a week . Was launching the Whipit ( Frisbee style ) , when the whip rotated on launch and caught my arm ripping the elevator off . Was an easy repair .. But that got me thinking along the lines of a launch peg . I got some really fine fiberglass mat from HK , and I just finished my experiment on some scrap foam . Basically I used PVA glue to lay the glass onto the foam . ( Add as little weight as possible ) After it dried I pushed a BBQ skewer thru to test the strength , better but not brilliant . So I applied some cyno to the glass patch . Much stronger , should work . So the plan for the whip : Apply some glass cloth to the top and bottom of one tip , when the PVA has dried apply some cyno for added strength . Push ( havent decided yet ) launch peg thru with epoxy . Thats the plan for the Whip Movement at the station : Yes there has been forward motion on the FX707 FF EPP glider . I got a fair bit of work done yesterday ( was a windy afternoon ) .. I was able to fit everything after hollowing out the nose .. To get CG close I needed a rather large 2s battery ( ?? 700mAH + ) CG is ball park , I really hope to avoid ballast . But the nose is a little on the short side .. Everything goes in there : 6ch Orange Rx , UBEC , 2x9g servos and the rather large battery for CG Hopefully ready for CG testing very shortly . |
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Last edited by old4570; Oct 12, 2018 at 05:20 AM.
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Quote: Every time It turned into the wind , it would slow down , tighten the turn and continue on
Yes, it would do that relative to the ground. In fact the airspeed would remain constant and the turn would not tighten. The appearance of a tighter turn is due to it flying in the moving body of air. |
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