|
DreadLlama posted:Has anyone got head tracking to work with FPV gimbals? Surely I'm not the first person to think of this. You could probably get like a blimp and rent time on a VR spot to people over the internet. Yes, it's been a thing (mainly with fixed wing craft) for quite a while. The higher end Fatshark goggles and the Skyzones have head tracking built in, you just need a camera on a pan & tilt servo and something to control it.
|
#
?
Mar 22, 2015 23:49
|
|
|
|
| # ? May 9, 2024 16:03 |
|
|
Odette posted:Really? Well, consider me happy to be proven wrong! http://www.rcgroups.com/forums/showthread.php?t=2332356 http://www.itsqv.com/QVW/index.php?title=Panasonic_NCR18650PF_3S3P_Pack_Test_and_Build Price point is about the same, but with significant weight saving. I'm tempted to build a ~12000mAh 4S pack.
|
|
#
?
Mar 22, 2015 23:53
|
|
|
I'm just trying to figure out what i need to solder these all together - my last attempt with a battery tab on a gb cart did not have particularly good results. edit: I guess the answer is, "a lot of flux" http://www.mtnelectronics.com/index.php?route=product/product&product_id=54&search=18650PF if anyone finds a cheaper price, let me know. 108 for 11.6 amp hours moron izzard fucked around with this message at 02:45 on Mar 23, 2015 |
|
#
?
Mar 23, 2015 02:01
|
|
|
A Yolo Wizard posted:I'm just trying to figure out what i need to solder these all together - my last attempt with a battery tab on a gb cart did not have particularly good results. The answer is "some flux" and "LOTS OF HEAT". The biggest problem with soldering to batteries, is that they can suck a lot of heat out of the iron really fast. Batteries are both good heat sinks, and very sensitive to high heat. You need to solder quickly to not damage the battery. I seem to have missed it, why are we talking about low-C battery packages? 18650's are fine packages, but they're not light..
|
|
#
?
Mar 23, 2015 04:30
|
|
|
Nerobro posted:The answer is "some flux" and "LOTS OF HEAT". The biggest problem with soldering to batteries, is that they can suck a lot of heat out of the iron really fast. Batteries are both good heat sinks, and very sensitive to high heat. You need to solder quickly to not damage the battery. They're good for transmitter packs or as batteries for large endurance craft.
|
|
#
?
Mar 23, 2015 05:08
|
|
|
Anyone used the Yuneec Q500? I'm kinda torn between that and a Phantom 2 Vision+ at the moment.
|
|
#
?
Mar 23, 2015 07:23
|
|
|
http://www.rcgroups.com/forums/showthread.php?t=2272622 http://www.fpvguy.com/2015/01/yuneec-q500.html It looks like a clone of the blade 350 QX3 AP, which flite test liked. except it has a worse camera and costs more. http://www.horizonhobby.com/350-qx3-ap-combo-rtf-with-safe-technology-blh8160 http://www.dji.com/product/phantom-2-vision-plus (15% off atm, most amazon sellers should also reflect this) Nerobro posted:I seem to have missed it, why are we talking about low-C battery packages? 18650's are fine packages, but they're not light.. a lot of the multistar high capacity packs i were interested in seem to be in short supply (the 6600 and 10000 especially). The numbers I were reading definitely put the 18650 at an advantage in both volume and mass per mah. http://www.itsqv.com/QVW/index.php?title=Panasonic_NCR18650PF_3S3P_Pack_Test_and_Build The only other low c battery I've seen is an announcement by HAIYIN on rcgroups that they were now selling them (but through direct inquiry only) http://www.rcgroups.com/forums/showthread.php?t=1539978&page=59 moron izzard fucked around with this message at 13:13 on Mar 23, 2015 |
|
#
?
Mar 23, 2015 12:57
|
|
|
You guys understand we're on the ground floor for some crazy bullshit Final Fantasy/Steampunk airships, right? God, I resent myself for saying it.
|
|
#
?
Mar 23, 2015 20:27
|
|
|
ionicism posted:They're good for transmitter packs or as batteries for large endurance craft. A Yolo Wizard posted:a lot of the multistar high capacity packs i were interested in seem to be in short supply (the 6600 and 10000 especially). The numbers I were reading definitely put the 18650 at an advantage in both volume and mass per mah. http://www.itsqv.com/QVW/index.php?title=Panasonic_NCR18650PF_3S3P_Pack_Test_and_Build Seeking those hour flight times eh? :-) I suppose a 10c battery isn't so bad. I have a stack of 18650's at home, I wonder what I can cobble together. (Stack = 15-20) Even with the metal cans, versus 15 or 20c LiPo packs the weight works out in favor of the 18650s?
|
|
#
?
Mar 23, 2015 21:40
|
|
|
Digital Jesus posted:Anyone used the Yuneec Q500? I'm kinda torn between that and a Phantom 2 Vision+ at the moment. I've played with one a little bit but not flown it unfortunately. It looks really cool. This is what I liked about it: Transmitter has plenty of camera controls on it Video screen downlink on transmitter has great quality Video range seems really good just walking around the building Transmitter feels really solid and high quality, better than the Phantom IMO Purportedly long flight times (35 minutes?) No fisheye in the camera like a go pro Camera/gimbal can come off and go on a handle for hand-held shooting What I didn't like about it: Frame seems fragile (but light) Motors seem cheap, they have a one-piece deep drawn bell rather than aluminum/iron Not sure if that helps. If I get a chance to fly it I'll let you know any updates.
|
|
#
?
Mar 24, 2015 00:23
|
|
|
Nerobro posted:Seeking those hour flight times eh? :-) I suppose a 10c battery isn't so bad. I have a stack of 18650's at home, I wonder what I can cobble together. (Stack = 15-20) My understanding is that you need the PF version of the 18650s.
|
|
#
?
Mar 24, 2015 00:25
|
|
|
Nerobro posted:Seeking those hour flight times eh? :-) I suppose a 10c battery isn't so bad. I have a stack of 18650's at home, I wonder what I can cobble together. (Stack = 15-20) The numbers I read claimed ~1000g for 14500mah of 18650 (4s). So like 14.5mah / gram vs 12.3mah / gram. I don't know about your 15 or 20c ones, but those generally would be heavier moron izzard fucked around with this message at 00:45 on Mar 24, 2015 |
|
#
?
Mar 24, 2015 00:40
|
|
|
A Yolo Wizard posted:The numbers I read claimed ~1000g for 14500mah of 18650 (4s). So like 14.5mah / gram vs 12.3mah / gram. I don't know about your 15 or 20c ones, but those generally would be heavier You can bet I'll be checking that tonight. :-) if the metal cans end up better... I'm gonna do some silly poo poo on my quads.
|
|
#
?
Mar 24, 2015 02:59
|
|
|
Unless your quad can fly for 30 minutes or greater there is likely no advantage. These are not exactly known for holding voltage under load. 10c is likely not realistic.
|
|
#
?
Mar 24, 2015 03:50
|
|
|
yeah, the 18650 were more like 3.5c https://www.youtube.com/watch?v=adfydRg8PYU moron izzard fucked around with this message at 04:23 on Mar 24, 2015 |
|
#
?
Mar 24, 2015 04:16
|
|
|
helno posted:Unless your quad can fly for 30 minutes or greater there is likely no advantage. The 3p thing is where I got 10c. SO.. I dug up a 20-30c turnigy cell. 183 grams. 2200mah. 24.2Wh. 7.56g/Wh. I have a ultrafire 3000mah 3.7v liion cell. 18650 size. 38.8g. 11.1Wh. 3.5g/Wh. That's.. Massive. Like, you could afford to carry twice as Wh for a given weight.  I still really like the way that thing looks. Nerobro fucked around with this message at 06:46 on Mar 24, 2015 |
|
#
?
Mar 24, 2015 05:51
|
|
|
 3D printed a prop guard, since those tiny bastards are like ninja discs. CommieGIR fucked around with this message at 16:45 on Mar 24, 2015 |
|
#
?
Mar 24, 2015 16:42
|
|
|
CommieGIR posted:
Ah man, that's way better than the one I got. Mine was just a stick on with double sided tape and doesn't do dick. That looks like it snaps onto the motors? Link?
|
|
#
?
Mar 24, 2015 16:50
|
|
|
deong posted:Ah man, that's way better than the one I got. Mine was just a stick on with double sided tape and doesn't do dick. That looks like it snaps onto the motors? http://www.thingiverse.com/thing:212615 Here is an alternative, individual prop guards: http://www.thingiverse.com/thing:343137 There are a couple different versions, this is Version 2, I printed Version 3 originally but it's a little too springy. The only issues is the motor mounts for the Estes Quadcopter are not solid, they are loosely held in there, so the guard pushes the motors around and you have to spend some time aligning it. EDIT: Take note, you may want to scale up the design a bit before you print, by 1-2% or so, as they are REALLY tight. I'm re-printing them with the scale increased to see if it makes it easier to fit. Alternate style: 
CommieGIR fucked around with this message at 19:33 on Mar 24, 2015 |
|
#
?
Mar 24, 2015 16:56
|
|
|
Arrest that rear end! posted:Yes, it's been a thing (mainly with fixed wing craft) for quite a while. The higher end Fatshark goggles and the Skyzones have head tracking built in, you just need a camera on a pan & tilt servo and something to control it. Really? poo poo, really? gently caress. Is there a general rundown/idiots guide on the internet? I want to ask a lot of questions but I think I'm not the first. Can they land? Can parachutes be opened via radio control? What about via accelerators? Is it legal to put an ELT in one in case you lose it? Are they necessarily constrained to one specific platform? I have specific interests.
|
|
#
?
Mar 25, 2015 05:37
|
|
|
DreadLlama posted:Really? poo poo, really? gently caress. I would learn to fly normally before flying something like that. Pulse Jets aren't going to be forgiving if your FPV goes out and you don't know how to fly and land with just LOS.
|
|
#
?
Mar 25, 2015 12:55
|
|
|
Apologies. I should have been more specific. My interest in pulsejets is due to them being cheap. They're the cheapest gas-burning engine. If one goes valveless, there are no moving parts to fail. Valveless pulsejets are elegant, like something Tesla might have designed. No, I don't want to go fast. I want a pig. I want fuel-laden glider with big wings stuffed with fuel that just barely has enough thrust to get off the ground, but stays up like rocks don't. (Like this guy did but not electric and also not a 450 3D heli because because gently caress if I can afford a T-rex. I want something which can loiter, all day today, all day tomorrow, and all next week. I want a geostationary satellite in aircraft form. Actually, I want a blimp. Or a zeppelin. Yeah. A loving FPV zeppelin. Do those exist yet? How are we coming along with integrating photovoltaics into aircraft fuselages? DreadLlama fucked around with this message at 03:00 on Mar 26, 2015 |
|
#
?
Mar 26, 2015 02:57
|
|
|
I currently have my video transmitter & control receiver antennas right next to each other on my ZMR250. Am I right in assuming that they should be at opposite ends of the frame to reduce interference?  Should I actually be concerned ..
|
|
#
?
Mar 26, 2015 03:01
|
|
|
I just bought a JJRC H9D and it's got all that jank stacked in the center. I have to unpower the camera before I handshake the controller/receivers or it won't move an inch. Spread those fuckers out and put some tinfoil between them.
|
|
#
?
Mar 26, 2015 05:21
|
|
|
DreadLlama posted:Really? poo poo, really? gently caress. I played with a fat shark from square one as a newb but none of your questions make a lick of sense to me. Godspeed with your project though!
|
|
#
?
Mar 26, 2015 06:38
|
|
|
DreadLlama posted:Apologies. I should have been more specific. Even if your fuel fraction was .9, you will won't get much run time from a pulsejet. They're really hungery. And they have the "high velocity" problem, where they lose a lot of potential thrust due to exhaust velocity. Pulsejets suck. Get them out of your mind. :-) Do you really want "all day" or "all of tomorrow" runtime? If that's really your goal, gas may be the only way to do it. You don't need cheap, you need economy. Now.. I want to do the math on this. Give me a couple hours.
|
|
#
?
Mar 26, 2015 19:22
|
|
|
DreadLlama posted:Actually, I want a blimp. Or a zeppelin. Yeah. A loving FPV zeppelin. Do those exist yet? How are we coming along with integrating photovoltaics into aircraft fuselages? Not gonna lie, now i'm curious too. Are RC blimps a thing? And if not, why the hell aren't they?
|
|
#
?
Mar 26, 2015 19:31
|
|
|
T1g4h posted:Not gonna lie, now i'm curious too. Are RC blimps a thing? And if not, why the hell aren't they? Have you even been to a sporting event? Those goddamn things are in every stadium. Look, they've dropped coupons for pizza!
|
|
#
?
Mar 26, 2015 19:41
|
|
|
With a 10ish foot wingspan you could do a day, or two airborne. You'll get around 18lbs to build the airframe. (that's pretty easy really) And you'll need a 2ish horsepower engine. RC blimps are a thing, they're just horrific to fly. They're slow so they are hard to control, and even light breezes make them useless.
|
|
#
?
Mar 26, 2015 19:46
|
|
|
Cannon_Fodder posted:Have you even been to a sporting event? Those goddamn things are in every stadium. Look, they've dropped coupons for pizza! Never been a huge sports fan, so I've never been to a stadium and can't tell if you're loving with me or not  Like, are they seriously a thing? And if so, how big and expensive are they? Because RC zeppelins / blimps just sound like they'd be neat, I want to know more.
|
|
#
?
Mar 26, 2015 19:46
|
|
|
T1g4h posted:Not gonna lie, now i'm curious too. Are RC blimps a thing? And if not, why the hell aren't they? As mentioned they are pretty common at sporting events. You see them indoors most often as wind is a big factor. Granted I've only talked to one person that flies them, so I don't know all that much, just that they are pretty neat. I have never seen an fpv setup, I can't imagine it would be that difficult. And flight time should be very high since you are only providing lateral thrust and not using it for lift. I also have no idea on cost or where you would even begin to go to acquire one. Edit: http://www.rcgroups.com/blimps-62/?s=2e617252595ce67f0437b9e100796ba5& subx fucked around with this message at 19:56 on Mar 26, 2015 |
|
#
?
Mar 26, 2015 19:50
|
|
|
T1g4h posted:Not gonna lie, now i'm curious too. Are RC blimps a thing? And if not, why the hell aren't they? Yeah
|
|
#
?
Mar 26, 2015 19:58
|
|
|
It seems like the square-cube law is helping you in zeppelins as they get bigger instead of hurting you like heavier-than-air craft. One cool thing you can do with small stuff is make them lighter than air by making the envelope out of something stiff and light (carbon fiber) and sucking the air out of it. Vacuum is much lighter than air; lighter than hydrogen, even!
|
|
#
?
Mar 26, 2015 21:36
|
|
|
subx posted:As mentioned they are pretty common at sporting events. You see them indoors most often as wind is a big factor. Granted I've only talked to one person that flies them, so I don't know all that much, just that they are pretty neat. Holy poo poo, first thread I saw after glancing through was "Lous' Hindenburg Build". That's somewhat amazing 
|
|
#
?
Mar 26, 2015 22:03
|
|
|
Apparently it is a thing. https://www.youtube.com/watch?v=zDd2ZSBqN-8 . But I'd expect the easy route is to just build a glider, and use solar energy in the form of thermals for lift.
|
|
#
?
Mar 26, 2015 23:53
|
|
|
babyeatingpsychopath posted:It seems like the square-cube law is helping you in zeppelins as they get bigger instead of hurting you like heavier-than-air craft. Unfortunately vacuum buoyancy doesn't work (Yet. Also, it may never work). The idea has been kicking around for a few hundred years (https://en.wikipedia.org/wiki/Vacuum_airship) but nothing practical has yet come from it.
|
|
#
?
Mar 27, 2015 09:00
|
|
|
If I am using a board like this Nano MX Multiwii to fly a quad, and it has 6 ports available for brushless ESC's: (ignore the red circle, this is someone elses image)  With no other places on the board to attach another motor to. I was wondering if I could remap D5 or D6 to be A0 and use it for servo camera pitch. This is a link to the .PDF of the sort-of datasheet where it actually does mention A0 and A1 can be used in quadx configuration but doesn't explain how. http://www.rcgroups.com/forums/showatt.php?attachmentid=7282834&d=1415885189 So is it even possible to use the ESC ports for running a servo?
|
|
#
?
Mar 27, 2015 19:45
|
|
|
DreadLlama posted:Unfortunately vacuum buoyancy doesn't work (Yet. Also, it may never work). The idea has been kicking around for a few hundred years (https://en.wikipedia.org/wiki/Vacuum_airship) but nothing practical has yet come from it. I have witnessed with my own eyes a contraption thus: four carbon fiber triangles approximately one foot on a side. These four triangles were butted up against each other and a refrigeration vacuum pump applied to a schrader valve installed in one of the triangles. This tetrahedron was then sucked down to about 15torr. When the pump hose was removed, the tetrahedron floated off the table and hit the ceiling. This dislodged one of the triangles, and the whole thing deflated with an impressive POP, and the four triangles fell to the ground. I don't know how much net buoyancy the device had, but I suspect not very much. edit: some math says that it was probably bigger than a foot on a side. This was 15 years ago, and just "hey, that's neat" at the time. But certainly less than 3' on a side.
|
|
#
?
Mar 28, 2015 01:43
|
|
|
...
DreadLlama fucked around with this message at 09:03 on Apr 4, 2015 |
|
#
?
Mar 28, 2015 02:57
|
|
|
|
| # ? May 9, 2024 16:03 |
|
|
I worked with a guy years ago that flew an rc blimp around the studio that had really high ceilings. It was all well and good until he got too close to the AC return vent. The blimp didn't have enough power to escape and was pulled in like a tractor beam.  Blimp.
|
|
#
?
Mar 30, 2015 04:20
|
|
