100+ for Brad

By wesblake on May 11, 2018

3 137 2

My neighbor wants to build a 100+ beast. We got this MRM reaper frame and some arms that were mis-printed to mod it for super-lightweight and up to 6" props (thanks to the idea of another neighbor, thanks Gary). 6mm arms but super light, trimmed top plate for lower TPU antenna mount. The goal is to get over 100 so right now looking at Emax RS, F40 Pro II, or Hypetrain Freestyle motors based on benchmarks, love to hear input on motors though!
UPDaTE: in the end he opted for different Motors, props, and Battery to save some time, so I'm not sure if it will hit the target speeds but it sure is pretty and flies super smooth!

Photos

Part List

Frame	MRM Stretch Reaper 217 FPV Racing Frame – MultiRotorMania (16 builds) Multirotormania.com	$54.99
Flight Controller	RaceFlight F405 RevoltOSD Flight Controller - Heli-Nation (5 builds) Heli-nation.com	$44.99
ESCs	FlightOne Bolt32 V2 32Bit 50A 4-6S 30x30 4in1 ESC (2 builds) Rotorriot.com	$64.99
Motors	4 x Tiger Motor F40 V2 (2305) 2400Kv (4 builds) Getfpv.com	$79.96
FPV Camera	Foxeer Night Wolf V2 700TVL 1/2 Inch CCD IR Sensitive FPV Camera PAL /NTSC Built-in OSD Audio (7 builds) Banggood.com	$42.90
FPV Transmitter	TBS Unify Pro 5G8 HV (SMA) (596 builds) Getfpv.com	See Site
Antenna	Lumenier AXII U.FL 5.8GHz Antenna (RHCP) (148 builds) Getfpv.com	$14.99
Receiver	FrSky R-XSR 2.4GHz 16CH ACCESS/ACCST Micro Receiver w/ S-Bus & CPPM (936 builds) Getfpv.com	See Site

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Discussion

Jodie Froster May 11, 2018

A high Kv motor, and a steep pitch/lighweight prop, combined with low drag are what you need for speed. You have most of it, get some agressive 2 blade props and a 2600~3000Kv set of motors

wesblake May 11, 2018

Yeah, my suggestion was APC 5.2x5 biblades and a couple motors we found that would make use of the 50A to produce nearly 2k grams of thrust per motor. This thing WITH battery came in under 400g! 20/1 if we had those motors. In the end he opted for saving time and money but maybe the speed bug will still get him down the road. ;)

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