Well if that quad weights about 400g and is going at around 40m/s (about 145km/h or 90mph) Gives a kinetic energy of 320j that's about the same energy as a .38 Special or about half the of the maximum measured energy of a horse kick.
Getting Shaun (lets fly RC) to join the rotor riot team was a good decision. His ideas for videos have def boosted entertainment for rotor riot a lot. It’s fun to watch these hehe
All alternatively you could have the prop mounted in such a way that its force goes through the center of the drone, then you wouldn't have the offbalance at least
Yeah like a Wah pedal or a sewing machine. You use your feet when you fly a real helicopter, so this is actually a spot on idea. Yours was too BergerMan ; )
If you use two counter rotating motors you could counteract the roll torque moment the one motor causes. As far as the pitch moment created, the mount for the motor could be lowered to be more in line with the center of mass, but that might be a little more impractical. Loving all the fun ideas!
"With the dji system i can change my rates right in the goggle." Pretty sure that's been doable for years before dji digital system. And i would love to see van rock up at a race sporting the dji goggles for a "nicer experience" haha
@@stinkerton but can you change the rates from inside the analogue goggles on the screens without a computer? He even stated you would normally need to hook it up to a laptop if your out in the field. Which is just not true!
You've got to remember. RR don't aim there content at us, the guys that have been in the hobby for quite some time. Especially where shilling is concerned thats for sure. We aren't their main audience.
This is *amazing*. This is my favourite type of video - a clever idea that basically anyone could do if they had that idea, but that results in much laughter among all of them. Reminds me of the "third person footrace" one.
I dont know if you guys are gonna read this, but I just wanted to say that I love this direction that rotor riot is going!!! I think the focus on building, wild experimentation, and exploring the niches of what can be done for drones is far more entertaining and captivating than going over various freestyle tricks, compilations, or product reviews. The amount of potential behind what can be done with spinning motors excites me and I hope that you guys bring it further in this direction!!!
Excellent idea ! One suggestion: You can tune the 5th motor to turn on at above 50% throttle. That way it will work more efficiently and help increase the speed more at straight line / higher throttle
That was freaking crazily insane!!! Good job Sean for built the turbo with 5th motor for turbo speed! That was super fun to watch and I can't believed this bike could bent and cracked the pipe of the gate!! 😯😯 I was shocked and it only got broken stack! The frame is truly strongest! 👏🏼👏🏼👏🏼 Good job for caption over for flying good job! 👏🏼👏🏼👏🏼 And thanks drew for taking videotaped! 👊🏼 Good job guys! 👏🏼👏🏼👏🏼
that isn't rebar. It is just a lightweight aluminum bar. You can bend it with your knee especially at that length. No way you can bend rebar (the type of bar that goes in concrete).
The extra motor is to far in the back, the thrust is now above the center of mass. if you position the extra motor more in the middle I think it would be more stable. And hell yeah would I like to see another episode
As long as the thrust points towards the center of mass, the force itself shouldn't impact the quadcopter, except on turns. The rear prop causes a torque as well as a directional force, which messes with the flight controller stability. The quad is also torqued while the motor is spinning.
On 30th December 2020 at 10:00 AM, I had the idea to add a propeller at the back of a quad, at 8:00 PM, I discovered this video, and it works pretty well ! Well done guys, and good position of the push vector going through the gravity center. Next improvement can be to put 2 propellers running in opposite (cw ccw) to avoid torque effect and power consumption to compensate it.
Bind the turbo motor with throttle position, and activate it with a second kill (arm) switch, that way you can fly with stand then activate the turbo motor mid fly, and control the output of the turbo with the analog position of the throttle!
Amazing work! 🤔 If it's a distraction to flip the 5th motor on and off, how about mapping the enabling of the motor to a switch but mapping the power output of the fifth motor to the combined stick inputs? - If you're zero'd out on pitch and punch the throttle, your 5th motor power is null. - If you pitch forward and punch throttle, the pitch/throttle combination pushes the 5th motor power curve to max. - As you dial in roll and yaw, even with pitch and throttle high, the 5th motor is dialed back down. This kind of setup should allow you to control the pusher motor output variably, maintaining control in curves, having max boost in straights and being able to hover in a stable manner. Would be a bit of tuning but once you get the curves mapped out, this should be pretty cool! :D
You need to make sure that the thrust vector of the 5th motor points through the centre of mass. Then it won't induce any torque on the quad that would need to be compensated.
Cool. In addition to the center of gravity / center of thrust that Joshua wrote, don't forget it has a significant reaction torque too. It constantly tries to twist the quad along the turbo rotor axis when on. This effect might be especially strong when turning on/off turbo mode (when the turbo prop changes rpm fast). The FC might have hard times with this, and could degrade handling in general. Try using two counter rotating turbo propellers to cancel-out this effect. :)
The booster would need to have a yaw and pitch function for it to work, and even then, the momentum would be carried a lot further making it harder to do sharp turns and flips. Boosters are good for moving straight. That’s about it.
You should hook it up in parallel with one of the rear motor controller outputs, and use a transistor so that it only kicks on past a certain throttle level. That way, the fan will kick on for the straight aways and the speed will scale with the rear motor, then it will kick off when you let off the throttle. Also, add a servo to the fan and a gyro sensor, and make the angle of the fan match the angle of the quad. This whole thing can be done with no coding if you're electrically savvy, or you can power a tiny arduino and code it yourself. It would be crazy simple to code and wire correctly
I just wanted to add, that was amazing, but you need to add one of those turning knobs on the throttle stick to control the turbo motor. this should be revisited. also, it was flying on 0 throttle cause of the autogiro effect. that is when a spinning propeller horizontally is pushed forward and the air resistance makes it spin and act like a wing.
Try the "Mixing" in your settings of your FRSKY controller. It allows you to mix one channel with another channel. For example you could set the 5th motor to come on at its mid throttle when the throttle stick is at 75% up and then when the stick is at full deflection you can set the mix to give full throttle to the 5th motor. In theory when Alex hits the straight away and goes full throttle so will the 5th motor. So he doesn't have to deal with a switch.
Ya, search for Foxtech Screamer. The product page still exists and has several videos. It's no longer sold though. Here's mine in action ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-JBeUphNPkKg.html
I bet you can make it so that the boost motor turns on or off depending on the position of the throttle, which would take a lot of the clinkiness out of the control. That way, when the pilot is at, say, 80 percent throttle, the boost comes on automatically, and then turns back off automatically if the throttle goes under the threshold, like in a corner. You could change the threshold based on the pilot and the specific course.
If possible tie the throttle of the boost to your pitch forward position + throttle position or do a momentary switch on your radio instead. I hope you revisit this that was a lot of fun to watch.
next time make it connected to the throttle-stick itself, so it will be more like flying a real quad but with massive power and you dont have to worry about flipping the switch!
Problem is, you tend to use more throttle in the turns, and that's not when you want max rear thrust. On my pentacopter, I put the rear motor on a slider. The DJI transmitter they were using has a wheel, but may not be able to put it on a channel.
You are onto something. A new category; drag droning or drone dragging. I wonder if that motor could be mixed in with the throttle somehow (and maybe a 6-in-1 ESC). For the Raider counter rotating "helicopter", I always thought the rear pusher prop was unnecessary and overly complex, but it is essential to get the speed/range.
I Wanna see dual rear turbos integrated to the throttle BUT USE 2 blade folding pusher props to get rid of the air drag. also on the lower end for sorta turbo breaking. SICK BUILD AND VID AS ALWAYS
Hahaha this was so cool! I love how it had you guys cracking up laughing 😂 And "Vanover the fastest real drone pilot in the world. Just dont give him a SIM" was perfect! Lol
Man, man, how fast that goes. I've never seen this before. But it also happens quickly when things go wrong. With an acceleration sensor you could measure the acceleration, and then adjust the angle of the turbo propeller with an extra servo. I hope that with this idea I can contribute to the solution of the problem. Keep it up.
two things.. maybe try adjusting the angle with a servo automatically based on quad tilt and second, make a mode where it adjusts throtle based on roll input (no roll = full boost etc)
You should try it as part of the mixer connected to throttle so that you can use the 5th motor to fly faster with less angle rather than on a servo and only at 50% or 100%, perhaps even reduce 5th motor throttle with increasing yaw and roll, with some advanced mixing I think you could do it. You could use a known angle of the rear motor to mix upwards thrust perhaps, or use a servo to keep the motor at 90 degrees
When the boost is "off", U need to precisely control the boost RPM slow enough so it matches the oncoming airstream. The idea is to zero out the drag while maneuvering. If you could do it perfectly, which I have no idea how you would, it would have zero effect on maneuverability yet still provide the boost in forward speed. Or simply just keep it turning at idle speeds always because a stopped propeller is a huge drag aerodynamically. Another thought I have is that the main props would act as wings when the rear motor is on since it would be pushing it beyond the speed of the air flowing through just the main props. With the forward angle of attack, that's going to push you down and require more power to maintain altitude. That's a lot of wasted energy. If you're going fast enough with boost, but using a level angle of attack, I think you would find it flies like an airplane since the main props effectively become wings. Would love to see you experiment with that one.
