Announcing the Raptor 140, the next airplane in the MyGeekShow fleet. Its a major improvement on the very successful Raptor airframe, slightly larger than the current Raptor (140cm wingspan vs 120cm), with a ton of improvements. What do you think? Am I missing anything?
Improvements over original Raptor:
Four times the battery capacity (2.2Ah to 8.8Ah)
Two times the motor power output (300W to 600W)
Better servos (9g cheap analog to 11g digital)
Better air flow (exposed to embedded electronics with canopy)
Better water proofing (plastic wrapped to embedded and sealed equipment)
Folding prop (8x4 fixed plastic to 10x6 folding carbon fiber)
Add current sensor (provides live, in flight Volts and Amp draw)
Seperate GPS & Compass (instead of mounted to APM, improves sensor clarity)
Adjustable camera angle (instead of fixed)
Add FPV Tx (to send live video feed to ground)
Add Airspeed Sensor (improved navigation, allows efficiency testing)
Improved Crash Damage Reduction (Batteries secured safely)
Larger and additional Carbon Fiber spars
And more...
Estimated performance:
Weight: 1200g to 1500g
Flight Time: 30min - 45min
Stall Speed: 25kph
Cruise Speed: 60kph
Max Speed: 120kph
Radio Range: 1.5km
The equipment that will go on it:
Autopilot: APM2 (no longer sold, visit http://store.3drobotics.com/products/apm-2-5-kit)
FPV/Onboard Camera: http://www.foxtechfpv.com/horyzonhd-full-hd-1080p-fpv-camera-v3-p-877.html
Radio Tx: ParkeFlyer Turnigy 9x Tx: http://parkeflyer.com/
Reciever: 6ch FlySky http://www.hobbypartz.com/79p-r6b-receiver.html
Telemtry: 915mhz 100mW 3DR http://store.3drobotics.com/products/3dr-radio-telemetry-kit-915-mhz
FPV: 5.8ghz 600mW http://www.foxtechfpv.com/58g-600mw-32ch-vtxrx-p-1118.html
Battery: 4.4Ah 30C Sky Lipo: http://www.hobbypartz.com/77p-sl4400-3s1p-30c-3333.html
ESC: 60A Brushless http://www.hobbypartz.com/proton60aair.html
Motor: 3542 1450kv brushless http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=38700
Prop: 10x6 Carbon Fiber Folding http://www.hobby-lobby.com/10x6_carbon_fiber_cam_blade_797_prd1.htm
Servos: 11g digital http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=42620
UBEC (for FPV camera): 3A http://hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=4319
Airspeed Sensor: http://store.3drobotics.com/products/airspeed-kit-with-mpxv7002dp
Learn More:
Raptor Details: http://www.mygeekshow.com/theairplanes/Raptor.html
USA Trip Details: http://www.mygeekshow.com/usatrip/
Follow the Show:
Website: http://www.mygeekshow.com
Facebook: http://www.facebook.com/MyGeekShow
Twitter: http://twitter.com/mygeekshow
Google+:http://plus.google.com/116950154481685699344
Skype: MyGeekShow
UStream: http://www.ustream.tv/channel/mygeekshow
Filmed, Edited, Produced and Published by Trent in Arkansas, USA
Comments
@Mike: Great recommendation. I've been a little hesitant to buy my aircraft, as I feel I get a lot of control over it's design and function if I build my own, however, I can see the benefit of taking advantage of the design and build of commercially produced aircraft.
Veikko: Wow... I did NOT think of this. As soon as I got home I tried spinning it in my hands, and it totally can and will do what you illustrated in "A". Scary. I've got a few ideas on how to prevent this from happening... I'll have to show you what I'm thinking when I put it together. Thank you! Great catch...
I know this is a DIY'er project but you might check out the Deep Reaper at Crash Test Hobby. It's a proven design that a lot of folks fly.
http://www.crashtesthobby.com/deep-reaper-61.html
They make a smaller one at 55" which is pretty close to what you're designing. If nothing else it can be a test bed for your final design.
-Mike
@Rob: Just saw your comment come in, we posted almost at the exact same time.
I've started hearing the same thing about Carbon Fiber on my YouTube comments... very interesting. I'll have to make an order of a fiberglass rod quickly! I've seen what wobble can do, it totally destroyed my Polaris a few months ago, so I think I'll add extra support to prevent that. Great tip. You are the second person to have concerns about the servos... that's enough for me. I'll place an order today to pick up a standard size. I only need two anyway, and I think it will pay off to do it right. I'll snag some laminating film as well, I've not tried this before, but I've heard from others it's benefits, as well as protecting the wing. I'll also grab a smaller prop when I get the funds, so I can compare results.
Thanks for the feedback!
Thank you everyone for your feedback! I've been pouring over each post...
@Gary: I'll reach out to him if he doesn't see this post, I'd love to get feedback from the expert!
@DWG: That is a very, very supportive offer! I don't believe Raptor 140 "as is" is going to be able to meet the demands of the USA trip, but a model bigger and faster may be able to do so... We'll see as I start testing the model. I agree though, hand launching it will only get harder as it gets heavier/larger. I'll message you about the launcher, it sounds (and looks!) awesome.
@Gerard: That is an excellent point (Rx RF interference). Let me review it's location and see if I can't get it more separated from the larger EM fields. I'll mess with the servos as well, to see if they appear strong enough to meet and exceed my current servos, I wasn't aware of that difference, thank you for the tip! I'll keep an eye on the temp as well. I'll work on a wiring diagram and place it on this discussion later this week for your feedback. Awesome stuff! Thank you!
@Joshua: That sounds pretty awesome! Do you have an estimated time for it's completion? I'd love to see pictures/video, you placing it anywhere?
@Johnathan: I've never seen those prop stoppers... I'll have to check them out. As for the canopy, its really just a cover, I'll be embedding it all as much as possible. I wasn't very clear on that part.
@Eduardo: Awesome pictures! That looks like a great airframe! I may have to steal some design features...
@Jernej: Very interesting proposition... are you saying that by going to a higher voltage (6S), and thereby using less amps, you'd actually end up with less weight, heat, etc? Very interesting! Thank you for the tips... let me think about this one. Does anyone else tried this/have any thoughts?
Thank you!
Hi Trent,
Nice plan form of the wing, looks good, make sure its stiff, use a 10mm fibreglass tubular spar (Fpver's prefer fibreglass to CF as CF can set up a dipole). As you get bigger and heavier the speed goes up and can cause wing flapping at high speed, this can lead to catastrophic failure.
Im glad your enclosing the gear, much more aerodynamic, this will add loads to flight time.
My only other thoughts are to use standard size servos 18-24g Those 11g digitals worry me, they can stall or overload very easily. Also if you have any rigidity problems , use laminating film for the leading edge of the wing, really helps.
I am using the 3536-1450kv motor but with a 8x6 folder, if your using a 10x6 go down to 1100kv.
I look forward to seeing the progress
cheers rob
Hi Trent! Nice plans, I am happy you increased tha wingspan, placed a current sensor and starting using metal gear servos. I just have similar interests and I am no expert, but I would have some suggestions for you anyway:
-Using one battery instead of two would simplify your charging and positioning, instead of increasing the capacity I would recommend increasing voltage(6s battery) ->less heat loss, less weight, simplicity and little longer flight time
http://hobbyking.com/hobbyking/store/__21373__ZIPPY_Compact_5000mAh...
-using more powerfull and quality motor ->faster airspeed-> less induced drag, better cooling, more efficient flight and higher cruise speed
http://hobbyking.com/hobbyking/store/__28693__NTM_Prop_Drive_Series...
and you would than need 70A ESC http://hobbyking.com/hobbyking/store/__10015__Hobbyking_SS_Heli_Ser...
-maybe you could use even bigger prop ->better efficiency
-more carbon fiber reinforcement due to faster airspeeds and heavier airplane
-you changed swept angle to 34° which I think is a good choice due to higher speeds, but you also lowered the aspect ratio to 4.4, I would suggest to take 160cm wingspan to get it around 5, if you want more lift
Again, I am no expert, just another flying wing builder and these are just my suggestions. Hope you make a awesome raptor and prepare for USA trip!
i have a similar flywing made with composite
My wing carry 10amp batterry .
Here are some pictures :
http://brquad.blogspot.com.br/2013/04/nova-asa.html
http://brquad.blogspot.com.br/
http://brquad.blogspot.com.br/2013/04/nova-asa.html
Looking good!
You might need a prop stop when using a folding prop in a pusher configuration: http://www.fpvmanuals.com/prop-stop/
Also, why not embed all the electronics in the foam instead of making the "canopy"?
I'm using modified motors from centrifuges which should provide for an extremely fast vehicle :)
Hey Trent,
I'm currently in the process of building an extremely large Hybrid F-117 that I think you might be interested in once I'm finished with it. The Wingspan of this vehicle is planned to be around 100-120 Inches in length and should provide for extremely fast flight speed and long flight endurance.
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