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G2loq 29/06/2016
Hi, I just received thoses Gemfab 3025BN for my tarot 130 fpv with Tarot MT1104-4000KV motors and at first, I must admitt I was really unhappy with them. The weight is 0.98 grams for one (versus 0.62 gramms for stock). Thoses propellers are also more wide : 5.24 mm instead of 4.13 mm for regular (3025 versus 3020 of course) Due to this extra wide, the 6 mm screws coming with the motos don't fit because they can not reach anymore the motor thread. M2 x 7mm screw are required for this setup ! As M2 x 7mm are not really common, I used M2 x 8mm with 1 mm spacers, ( 8mmm screw will touch and damage the copper of the motor). Then the total of each screw is now 0.34 grams instead of 0.20. As we need 4 propellers and 8 screws sets, the total additional weight for this propellers are (for the moment mm with 8mm screw - I already ordered M2 x 7mm h3ex screw on e b a y as do not find out here) is : 0.98 x 4 + 0.34 x 8 = 6.64 grs vs 0.62 x 4 + 0.20 x 8 = 4.08 grs 2.56 grams more ! Should be only with 1.6 grams more with M2 x 7mm (22 grams each) I also tested them in flight and I must admit now that except the screw issue, I pretty have more torque with those propellers... then more speed and sensitivity... Maybe mean more crashes :) These are 3025 (versus 3020 for stock tarot props). I recommend !
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