Multirotor, multicopter and quadcopter discussion - The Drone thread

d_brennen said:
Rilot, any lag in the video going from analogue to digital? Interested as I have never heard of anyone using the Rift for FPV
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About 0.1 of a second I reckon. The pipeline is quite long so that's pretty good IMO.

Camera -> vTx -> vRx -> Capture device -> OpenGL renderer -> Rift
 
Awesome, love that the DK2 can be used for FPV. I'd been thinking about that since I want a Rift anyway for PC gaming.
Should make some time to actually rebuild and fly the quad really :/ those fpv250s have me tempted!
 
Raz84 said:
So i have the following ordered and was wondering what size batteries would be best. I have some 3s 1000mah 25-35c and 2200mah 40-50c, would either of these be ok?
s
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1000mah will be fine, but you really want 1300s. I've upped mine to 4s 1300 as its more poke for around the same weight and price. All the top blackout quads run 4s too. :D
 
I wish HobbyKing would sort their stock out :(

Genoma said:
2200mah sounds a bit heavy for a 250
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I read a 250 build somewhere where the guy tested a number of different sized batteries. He found that 1300 was about the best as beyond that the added weight reduced flight times by more than the added power increased it.
 
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Skeeter said:
I read a 250 build somewhere where the guy tested a number of different sized batteries. He found that 1300 was about the best as beyond that the added weight reduced flight times by more than the added power increased it.
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Its probably on the cusp tbh. My carbon 250 (same as Raz's) AIW seems to be the same if I remove the mobius from my unscientific "pick it up with two fingers" measurements.

That is

Zippy 1500mah + Mobius = Turnigy 2200mah with no recording

Awesome little frames though, so much more room than on a standard FPV250. It would be worth trying out some HQ 5040 carbon reinforced props next to both the 5030 and 6030s, I suspect they will give noticeably more oomph than even the latter. These props were a revelation to me tbh
 
Raz84 said:
So i have the following ordered and was wondering what size batteries would be best. I have some 3s 1000mah 25-35c and 2200mah 40-50c, would either of these be ok?

4 x Emax SimonK 12A
4 x ZMR 1804 2400kv Motor
H250 Carbon Fiber Frame
Full Naze 32 FC
HK 6ch Receiver
HQ 5030 and 6030 props
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just ordered one of those frames myself although I'm going with the dys BE1806 motors they have rather than the 1804 for a bit more grunt

for anyone else buying from bg use code goodbg to save 5% :)
 
How do you guys mount your FPV aerials?

Test my FPV setup last night and was only getting about 50m range, maybe even less

I got some circular polarized antennas:

http://www.hobbyking.com/hobbyking/...Antenna_RP_SMA_Transmitter_and_Receiver_.html

and I'm using this Tx

http://www.hobbyking.com/hobbyking/store/__27145__Boscam_TS353_5_8G_400mW_FPV_Transmitter.html

The Tx is mount on top of one of the legs and I bent the aerial so it was facing downward, if I turned it more than about 90 degrees though I lost signal at not much distance

I also discovered that I had the antennas the wrong way round on the Tx and Rx which probably was helping matters

Is it best to have the antenna facing downwards or should it be upright?
 
howler said:
How do you guys mount your FPV aerials?

Test my FPV setup last night and was only getting about 50m range, maybe even less

I got some circular polarized antennas:

http://www.hobbyking.com/hobbyking/...Antenna_RP_SMA_Transmitter_and_Receiver_.html

and I'm using this Tx

http://www.hobbyking.com/hobbyking/store/__27145__Boscam_TS353_5_8G_400mW_FPV_Transmitter.html

The Tx is mount on top of one of the legs and I bent the aerial so it was facing downward, if I turned it more than about 90 degrees though I lost signal at not much distance

I also discovered that I had the antennas the wrong way round on the Tx and Rx which probably was helping matters

Is it best to have the antenna facing downwards or should it be upright?
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I know little about FPV, but antennas is another matter... It shouldn't matter in theory, but if you have enough clearance I'd mount it below the frame i.e. pointing down.

When it's 90 degrees your tx antenna will be "looking at" a null in the clover leaf radiation pattern, hence your signal loss.

one question though - when you say you 'bent' it to face downwards what do you mean - can you post a pic?
 
Should have taken a pic really, the antenna has a "flexible shaft" which allowed me to curve it around, I will take some pics when I get home as it is hard to explain
 
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