Folding Hquad build - RC Groups
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Jan 08, 2013, 08:26 PM
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Folding Hquad build

I flew my tricopter quite a bit this summer and decided it is time for a larger more capable machine.

The Hquad seems pretty popular lately so figured that is the way to go.

Current power system is as follows.

RCtimer 2830-14 750kv motors (might replace these with sunnysky 3508's if I need more power)
APC 12x3.8 slowfly props.
Hobbywing quattro ESC
Turnigy 3600 mAh 3s battery
KK2.0 control board

Here is the cad file showing the front/back ends with arm pivots.

I started cutting yesterday and after much finishing and counter boring I have the beginnings of a multirotor.

The frame so far weighs less than I figured (800g)

Starts to get heavy once everything is loaded on top.

Slots of the bottom are for battery straps.

Basic construction is 1/16" G10 plate flush riveted to 1/2"x1/2"x0.058" aluminum tubing. I am debating weather to have the top plate screwed on rather than riveted to avoid lots of drilling when I inevitably need to get access to the innards.
Last edited by Helno; Jan 09, 2013 at 08:40 PM.
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Jan 08, 2013, 11:02 PM
i dont think i can see the pics because they are linked from RCcanada
Jan 09, 2013, 07:50 PM
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Mortimer's Avatar
Pics are also invisible on RCCanada:
Jan 09, 2013, 08:43 PM
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Something messed up with rccanada's auto image inking thing and I copied the body of the post not realizing it.
Jan 10, 2013, 07:49 AM
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eyesonsky's Avatar
Originally Posted by Helno
The Hquad seems pretty popular lately so figured that is the way to go.
Yes, and I think it will continue

quadH is easy to build, cheap, great for video, FPV and many place onboard.

Nice one, well done.
Jan 10, 2013, 08:47 PM
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Had to find some 3/32 rivets for the Dzus springs.

Video will be here once it is done uploading. They are a bit tough to turn one handed.

Quarter turn release camera mount (0 min 0 sec)
Jan 14, 2013, 08:40 AM
Chasing dreams not d competion
What is the fuel tubing for?
Jan 14, 2013, 09:40 AM
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Super simple gimbal.

The fuel tubing provides a flexible link to the servos and damps vibrations.
Jan 14, 2013, 03:02 PM
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Hey let me know how you get along with those rctimer motors I have the 2836's and plan on running 12x4.5 props on them.

Also where are you getting your stuff cut?
Jan 14, 2013, 09:07 PM
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I run the 850 kv motors with apc 12x3.8s on a tricopter without overheating. I figure the 750s should work well since the quad will run at a higher average load.

I cut the parts out myself on a Phlatprinter 3. It is pretty light duty so it is not perfect for hard materials like this but it does a pretty good job for the price.

I started to assemble the folding arms and might just install fixed arms if I have to much trouble getting things as solid as I want.
Jan 15, 2013, 08:26 AM
Chasing dreams not d competion
Originally Posted by Helno
Super simple gimbal.

The fuel tubing provides a flexible link to the servos and damps vibrations.
Thanks for your reply and the link
Jan 15, 2013, 09:46 PM
Registered User
Hey mate,
Awesome looking build so far. I too am building a h quad. The design is just from the flight test boys
I am really surprised that your frame weight is nearly 800g. I was worried that my frame was 460g when the flight test frame was only 280g
Have u done anymore. Would love to see how your gimbal works as this is something I was looking at doing once I have it all done.
Jan 15, 2013, 10:04 PM
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My frame is quite heavy because it is very large. It is meant for 12" props and is 18" motor to motor. I could drastically cut down on the weight by using thinner material but I have to work with what I have.
Jan 15, 2013, 11:10 PM
Registered User
Yeh my frame is 18 inches motor to motor each way and is designed for the 11 inch props but could handle 12.
It's no problem, just makes me feel a bit better as I built one frame with 5mm ply and frame only was 530 grams which I thought was way too heavy so I built another frame with 3mm ply and it only dropped the weight to 460grams. As I will be having fpv gear, the gopro 3 in housing, a 3s 4000 battery Im sure I'm at about 1.6 -1.8 kg. should be good as I am using the dt750's rated at 1000g of thrust on a 4s. That should still put me at about 50% throttle for hover.
Sorry to write so much. Back to your quad. I wish I could afford one of those cnc machines you have. I don't think I would ever leave my shed.
Jan 15, 2013, 11:47 PM
Chasing dreams not d competion
Originally Posted by macca05
......... a 3s 4000 battery ........ I am using the dt750's rated at 1000g of thrust on a 4s.
Are you carrying two batts or was this a typo?

My quad is also simular dimensions and i was planning on the dt750's as well but i can not get the quadcalc to like any of my choices.

I was planning on getting the quad to a finished state minus the motor's and battery then asking help here for the best choice once i have an exact weight and size.
So i am glad you both (Helno , Macca05) also have simular sizes with simular spec equipment.

What flight times are you both estimating?

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