Tieman
Junior Member
Hi all.
I like to building multirotors and I change my crafts few times per year. 2 months ago I decided to build V-Tail based on FT batBone frame and I wanted to share my experiences with you.
First of all. Final craft looks like this.
I followed the David's tutorial but my v-tail does not behave properly.
At the beginning I was not able to fly it at all (craft was spinning around). It took me some time to figure it out what is wrong. There are 2 versions of V-tail designs. The original one (looks like real V ) and inverted one (looks like David's example) and gues What? The MultiWii config option VTAIL4 refers to the first case.
if you wana build V-Tail based on multiWii and want to make it look like David's you must change motor layout in Output.ccp in multiWii firmware to that:
#elif defined( VTAIL4 )
motor[0] = PIDMIX(+0,+1, -1); //REAR_R
motor[1] = PIDMIX(-1, -1, +0); //FRONT_R
motor[2] = PIDMIX(+0,+1, +1); //REAR_L
motor[3] = PIDMIX(+1, -1, -0); //FRONT_L
Second problem I encountered was constant forward drift due to bad angle of back motors.
To fix that I made a simple hack to mount the rear motors at a proper angle:
And it looks like this:
And of course, for stable and smooth video brushless gimbal is a must, but there is not much space
on BatBone frame, so I decided to mount it in front. And again, a wooden bom on the top did the trick:
This allowed me to reduce the thickness of the model and keep it more compact.
Underneath i have a Power distribution board with 2 voltage regulators (5V & 12V) and battery holder similar to David's tricopter.
And here is a video example from this platform:
overall specs:
FC: MultiWii PRO Ez3.0 with uBlox 6M GPS
motors: NTM Prop Drive 28-26 1000KV
prop: Graupner E-Prop 10x5
ESC: Turnigy Plush 30A
FPV gear: Sony CCD camera with Boscam RX/TX 5.8 GHz
Battery: ZIPPY Compact 4500mAh 4S 35C
RC: FrSky D8R-II PLUS
Gimbal: Falcon Mini Brushless Gimbal from FoxTech
I like to building multirotors and I change my crafts few times per year. 2 months ago I decided to build V-Tail based on FT batBone frame and I wanted to share my experiences with you.
First of all. Final craft looks like this.
![tieman_batbone_vtail_1.jpg tieman_batbone_vtail_1.jpg](https://ftforumx2.s3.amazonaws.com/2014/05/69696_55f09644142a29bffbe94e4d1be48084_thumb.jpg)
I followed the David's tutorial but my v-tail does not behave properly.
At the beginning I was not able to fly it at all (craft was spinning around). It took me some time to figure it out what is wrong. There are 2 versions of V-tail designs. The original one (looks like real V ) and inverted one (looks like David's example) and gues What? The MultiWii config option VTAIL4 refers to the first case.
if you wana build V-Tail based on multiWii and want to make it look like David's you must change motor layout in Output.ccp in multiWii firmware to that:
#elif defined( VTAIL4 )
motor[0] = PIDMIX(+0,+1, -1); //REAR_R
motor[1] = PIDMIX(-1, -1, +0); //FRONT_R
motor[2] = PIDMIX(+0,+1, +1); //REAR_L
motor[3] = PIDMIX(+1, -1, -0); //FRONT_L
Second problem I encountered was constant forward drift due to bad angle of back motors.
To fix that I made a simple hack to mount the rear motors at a proper angle:
![vtail_booms.jpg vtail_booms.jpg](https://ftforumx2.s3.amazonaws.com/2014/05/67431_7c648217df1f313c47e7c0d9e37d4803_thumb.jpg)
And it looks like this:
![tieman_batbone_vtail_2.jpg tieman_batbone_vtail_2.jpg](https://ftforumx2.s3.amazonaws.com/2014/05/69707_985bb34882bc5d492ee8126827d724f2_thumb.jpg)
And of course, for stable and smooth video brushless gimbal is a must, but there is not much space
on BatBone frame, so I decided to mount it in front. And again, a wooden bom on the top did the trick:
![tieman_batbone_vtail_3.jpg tieman_batbone_vtail_3.jpg](https://ftforumx2.s3.amazonaws.com/2014/05/69700_114b699863948d7bb3bffff0865e6394_thumb.jpg)
![tieman_batbone_vtail_6.jpg tieman_batbone_vtail_6.jpg](https://ftforumx2.s3.amazonaws.com/2014/05/69703_04eb52b2877ed2982117c02bb21bb468_thumb.jpg)
This allowed me to reduce the thickness of the model and keep it more compact.
Underneath i have a Power distribution board with 2 voltage regulators (5V & 12V) and battery holder similar to David's tricopter.
![tieman_batbone_vtail_5.jpg tieman_batbone_vtail_5.jpg](https://ftforumx2.s3.amazonaws.com/2014/05/69706_d21aa4204a5eaa6dc57bba46f4180fea_thumb.jpg)
And here is a video example from this platform:
overall specs:
FC: MultiWii PRO Ez3.0 with uBlox 6M GPS
motors: NTM Prop Drive 28-26 1000KV
prop: Graupner E-Prop 10x5
ESC: Turnigy Plush 30A
FPV gear: Sony CCD camera with Boscam RX/TX 5.8 GHz
Battery: ZIPPY Compact 4500mAh 4S 35C
RC: FrSky D8R-II PLUS
Gimbal: Falcon Mini Brushless Gimbal from FoxTech
Last edited: