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May 27, 2018, 12:42 AM
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100 Gram RTF Spirit 600 Flying wing Project


Spirit 600 flying wing from Fasttech $20 USD shipped - https://www.fasttech.com/p/7327502
Hot SKY3025 2.5g Micro Servo off Ebay $4.19 each
4ch Frsky Rx from Banggood - https://www.banggood.com/2_4G-4CH-Mi...r_warehouse=CN
6 amp ESC off Ebay
Motor from GB - https://www.gearbest.com/motor/pp_11...ml?wid=1433363

The goal - to build a 100 gram RTF flying wing ( Or better )
Yes - just completed it ..

Pic 1
Pic 2 The completed Wing

Both ESC and Rx were fitted to the side of the fuse with double sided foam tape + a zip tie
Servos were hot glued into the wing
Pic 3 / Pic 4
The wing tips and control hardware did add weight where it was not wanted , behind CG ..
I still have not installed the propeller , and the 250 mAh 2s battery just , and I mean just balances at CG ..
Weight without the prop and with the battery was ....
Damned close to 90 grams = 90.5 grams ( less Prop )
So I dare say I made it past 100 grams with room to spare .

I may have to buy some slightly larger 2s batteries , maybe 350 mAh ...
Wonder what I have in the battery box ?
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May 29, 2018, 11:01 PM
Forward ever, backward never!
Brainstorm's Avatar
old4570: That's a pretty neat wing project!

With 250g builds becoming commonplace, 100g offers a new level of challenge. Keep up the good work!

Just wanted to offer up a recommendation for a better LiPo: nano-tech 2S 300mAh 45C from Hobby King. Make sure to get the 45C version, not the lower rated 35C. They are by far the best 2S micro LiPo available.
May 30, 2018, 01:28 AM
Registered User
My batteries just came from Hobby King ..
I ordered the 300mAh 35C Nano-Tech ( Because it was cheap ) , my motor only pulls 3A so the battery should cope . I also got a 350mAh battery as well a 450mAh ..

I already had some 350mAh batteries , but since I was ordering from Hobby King .
Funny thing , due to my placement of components , I have a rather large battery range to chose from .

Wing balances with 250mAh to almost 500mAh ..
So I have lots of battery options to play with ..
The motor is 1:1 power to weight with a fresh battery .. And slightly less with lower voltage batteries ..

Most people flying wings want speed - I wan't low speed capability + a decent glide .
Winter is almost here and the weather is some what pox , hopefully I will be out soon giving this one a go ..


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