Pyromaniac605
Toast! :D
Thanks, I might end up using some in the future when I can be bothered finding a RC club to fly at.
Darren
Edit: And when I get a plane.
Darren
Edit: And when I get a plane.
RC DeltaGliderIV project
- Thread starter RisingFury
- Start date
RisingFury
OBSP developer
Well, I got some updates.
A while ago I ordered batteries, motors and a bunch of other things form a trusted online RC shop in China. Due to no advertising rule, I won't name the shop, but if you want it, PM me.
The shipping was fast. You can track the order all the way from when you pay, to when it arrives. It shipped from the warehouse within 36 hours and got to Slovenia from China in like 4 days. Took another 4 days for the lazybum customs office though, before I got the package.
I ordered a bunch of things for myself and for my friend, to lower the shipping costs. In total 15 items, of which six batteries and two motors for myself.
One motor is now mounted to the DeltaGliderIV:
In conjunction with a 6 cell battery (which I also bought), the motor can pump out roughly 4.5 kg of thrust. With the weight of the DGIV at around 3.5 kg, this should be more then enough to go vertical. Might not even need to take off at full thrust...
The other motor is a bit smaller and can run off a 3 or 4 cell battery. I bought a 3 cell battery for it. It'll be placed on a smaller plane I'm getting later on.
The batteries I bought are here:
The four blue ones are for the DGIV. They're 6 cell, 4000 mAh, 20 C discharge. Capable of sustaining roughly 80 amps at 22 volts, providing a total power of roughly 1700 W. Though I'll run them at a max of 60 A. Most of the flight will actually be at lower throttle, so around 40 A. At that current the battery would last roughly 5 to 6 minutes, giving a decent flight time. There a chance I could get enough thrust for cruising around even at a lower current...
Give that I bought 4 of these babies, I'm looking at a 20 minute total flight time.
The yellow batteries are 3 cell, 4900 mAh, 20 C discharge, capable of roughly 100 A max current at 11 volts. Though they will be run at a max of 40 amp with the smaller motor.
A while ago I ordered batteries, motors and a bunch of other things form a trusted online RC shop in China. Due to no advertising rule, I won't name the shop, but if you want it, PM me.
The shipping was fast. You can track the order all the way from when you pay, to when it arrives. It shipped from the warehouse within 36 hours and got to Slovenia from China in like 4 days. Took another 4 days for the lazybum customs office though, before I got the package.
I ordered a bunch of things for myself and for my friend, to lower the shipping costs. In total 15 items, of which six batteries and two motors for myself.
One motor is now mounted to the DeltaGliderIV:
In conjunction with a 6 cell battery (which I also bought), the motor can pump out roughly 4.5 kg of thrust. With the weight of the DGIV at around 3.5 kg, this should be more then enough to go vertical. Might not even need to take off at full thrust...
The other motor is a bit smaller and can run off a 3 or 4 cell battery. I bought a 3 cell battery for it. It'll be placed on a smaller plane I'm getting later on.
The batteries I bought are here:
The four blue ones are for the DGIV. They're 6 cell, 4000 mAh, 20 C discharge. Capable of sustaining roughly 80 amps at 22 volts, providing a total power of roughly 1700 W. Though I'll run them at a max of 60 A. Most of the flight will actually be at lower throttle, so around 40 A. At that current the battery would last roughly 5 to 6 minutes, giving a decent flight time. There a chance I could get enough thrust for cruising around even at a lower current...
Give that I bought 4 of these babies, I'm looking at a 20 minute total flight time.
The yellow batteries are 3 cell, 4900 mAh, 20 C discharge, capable of roughly 100 A max current at 11 volts. Though they will be run at a max of 40 amp with the smaller motor.
RisingFury
OBSP developer
I still need a few small bits and pieces - the connector sizes in the two different battery types are different and between the two motors are different, so I need to buy a whole bunch so I can sync them up for use with one speed control.
I also need some high performance wire. I tried to run the 3 cell battery through a thick normal wire, but it burned the insulation in less then a second and started glowing red.
I need hinges to mount the air control surfaces and I also need to build the wagon to launch the DGIV in the air.
I'll probably take the first flight during the winter. There are two good reasons for that...... the air is slightly denser at low temperature allowing slightly lower landing speed and I'm hoping for ice on the lakes to provide me with an awesome takeoff and landing area.
I also need some high performance wire. I tried to run the 3 cell battery through a thick normal wire, but it burned the insulation in less then a second and started glowing red.
I need hinges to mount the air control surfaces and I also need to build the wagon to launch the DGIV in the air.
I'll probably take the first flight during the winter. There are two good reasons for that...... the air is slightly denser at low temperature allowing slightly lower landing speed and I'm hoping for ice on the lakes to provide me with an awesome takeoff and landing area.
RisingFury
OBSP developer
No news really. The DeltaGliderIV is finished ans is now waiting for me to get more experience flying high speed planes. I'm getting a high speed plane soon that I can practice on.
Brycesv1
Crash Test Expert
sweet. cant wait to see that vid
This looks real good! Some questions though. Have you considered CG and Center of Lift? Are they balanced? Is this naturally stable or unstable? Is the thrust-line centered? Lift and drag all in order? Lot's of stuff I'd like to see you work through before first flight.
With such a nice model I would try and do as many tests as possible. We made a home-made wind tunnel with garbage cans and window fans. Good for small models. Perhaps much smaller than your model.
With such a nice model I would try and do as many tests as possible. We made a home-made wind tunnel with garbage cans and window fans. Good for small models. Perhaps much smaller than your model.
RisingFury
OBSP developer
Yea, wouldn't that be nice...
The thrust is on the center line, but that's about the only thing I can say for sure. I deliberatly made the control surfaces on the plane larger so I can compensate in flight for any instability - especially on the first flight. The CG can be regulated by moving the battery forward or aft...
If for some reason you don't see pics all throughout this thread, all of them are uploaded here:
http://www.unrealaddicts.com/forums/Janez/DeltaGliderIV/Build/
I've used these pages for some fine tuning of conventional designs, but perhaps they may be of use to you. Or give you ideas of something you maybe overlooked.
http://adamone.rchomepage.com/cg_calc.htm
http://adamone.rchomepage.com/design.htm#calculate
http://adamone.rchomepage.com/calc_motor.htm
http://flbeagle.rchomepage.com/software/webocalc_1.5.2/webocalc.html
http://adamone.rchomepage.com/calc_cubicload.htm
http://adamone.rchomepage.com/calc_stallspeed.htm
http://adamone.rchomepage.com/cg_canard.htm
http://adamone.rchomepage.com/calc_thrust.htm
I'm also a big fan of x-plane from http://x-plane.com/
How it determines the flying characteristics of the models is really slick.
http://x-plane.com/pg_Inside_X-Plane.html
And a good manual that talks about the plane-maker module
http://x-plane.com/files/manuals/X-Plane_Desktop_manual.pdf
If you had the time, you could input the exact dimensions of your model and x-plane would simulate exactly how it flies based on weight, cg, wing specs, balance, all that good stuff. You could fly your model before you fly it! Pages 146-164. It is also easy to get lost in all this goodness!!
And I frequently use x-plane in conjunction with orbiter for my evening sightseeing adventures.
http://adamone.rchomepage.com/cg_calc.htm
http://adamone.rchomepage.com/design.htm#calculate
http://adamone.rchomepage.com/calc_motor.htm
http://flbeagle.rchomepage.com/software/webocalc_1.5.2/webocalc.html
http://adamone.rchomepage.com/calc_cubicload.htm
http://adamone.rchomepage.com/calc_stallspeed.htm
http://adamone.rchomepage.com/cg_canard.htm
http://adamone.rchomepage.com/calc_thrust.htm
I'm also a big fan of x-plane from http://x-plane.com/
How it determines the flying characteristics of the models is really slick.
http://x-plane.com/pg_Inside_X-Plane.html
And a good manual that talks about the plane-maker module
http://x-plane.com/files/manuals/X-Plane_Desktop_manual.pdf
If you had the time, you could input the exact dimensions of your model and x-plane would simulate exactly how it flies based on weight, cg, wing specs, balance, all that good stuff. You could fly your model before you fly it! Pages 146-164. It is also easy to get lost in all this goodness!!
And I frequently use x-plane in conjunction with orbiter for my evening sightseeing adventures.
RisingFury
OBSP developer
Hey, thanks for the links! I'll save them. I checked the calculations for propeller thrust and am confident there will be more then enough, even at less then 100% throttle.
I'll see about X-plane. I probably won't have enough time in the near future.
Aeadar
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Hey RisingFury! Awesome project you have going. I just caught up on this thread yesterday.
Have you thought of installing a small video camera onboard? I understand they make them quite small, light, and inexpensive nowadays.
Good luck! We're eagerly awaiting the maiden flight!
Have you thought of installing a small video camera onboard? I understand they make them quite small, light, and inexpensive nowadays.
Good luck! We're eagerly awaiting the maiden flight!
RisingFury
OBSP developer
Hey RisingFury! Awesome project you have going. I just caught up on this thread yesterday.
Have you thought of installing a small video camera onboard? I understand they make them quite small, light, and inexpensive nowadays.
Good luck! We're eagerly awaiting the maiden flight!
I will put a camera on. I'll buy a FlyCamOne3.
Aeadar
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Nice! That thing looks really sweet!
I haven't the means to do RC, or model rocketry (transportation issues mostly), but I sure do like the tech that's available for it.
Really looking forward to your flight videos now!:tiphat:
I haven't the means to do RC, or model rocketry (transportation issues mostly), but I sure do like the tech that's available for it.
Really looking forward to your flight videos now!:tiphat:
RisingFury
OBSP developer
What do you mean with that? Are you in the middle of a large city and can't fly anywhere? If so, go for small foamies that fly slowly and you can fly in a park or up and down a street...
astrosammy
Dash!
Wow, how did you find them so far away?
RisingFury
OBSP developer
Did you use KF airfoils on them? If you don't know what KF airfoils are, you should *really* look into them. They'll increase the performance of fomies and paper airplanes.
These were just regular planes folded up in a second. Like what you throw in primary school class. It was a really windy day, I assume all the thermals from the surrounding city buildings contributed quite a bit.
We just put our cell phone number (which was to be changed soon) on the plane, and we wrote an "if found..." note. We drew a stick figure atop the 'Center - throwing arrows. You write a little story, you put some racing stripes on them and that's pretty much it! If I still have the .pdf I'll post it here. We also put a few postage stamps in some but never got those back. We never got calls, but we got text messages. Out of 75 or so good launches we heard back from 9.
I didn't do anything special to the airfoil. There might have been one step in it, but it wasn't intentional. I guess the wingtips were most important, because, the ones with winglets pointed up went the farthest. The ones with them pointed down, like the xb-70, didn't get far at all.
We just put our cell phone number (which was to be changed soon) on the plane, and we wrote an "if found..." note. We drew a stick figure atop the 'Center - throwing arrows. You write a little story, you put some racing stripes on them and that's pretty much it! If I still have the .pdf I'll post it here. We also put a few postage stamps in some but never got those back. We never got calls, but we got text messages. Out of 75 or so good launches we heard back from 9.
I didn't do anything special to the airfoil. There might have been one step in it, but it wasn't intentional. I guess the wingtips were most important, because, the ones with winglets pointed up went the farthest. The ones with them pointed down, like the xb-70, didn't get far at all.
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