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Multi Rotor Helicopters - Tandem Multi Rotor Helicopters - Tandem


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Old 06-05-2019, 04:57 PM   #21 (permalink)
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Been busy running around doing crap I don't want to do.

But I did come up with an easier-to-fabricate bell crank design.
Hopefully some pictures this weekend!!
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Old 06-05-2019, 05:48 PM   #22 (permalink)
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Thank you for the link.
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Old 06-06-2019, 05:39 AM   #23 (permalink)
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No problem. I hope you buy one and add it to your fleet!!
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Old 06-10-2019, 05:59 PM   #24 (permalink)
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I think I'm going to try turning the V-rods into Y-rods.

The main problem is there isn't much room on the rear section between the body and the linkage. Being able to successfully make Y-rods will mean only 1 ball link to deal with.
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Old 08-04-2019, 08:48 AM   #25 (permalink)
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The Y rod idea worked very well. Now I'm thinking of carrying that concept one step further.

I have decided to re-position my batteries based on a conversation that extrapilot had in another thread.
I am running (2) 2S packs in series, so this means I can split the weight up between the front and rear.

I'm also thinking about loading the packs from the top. Sure would be easier than flipping the heli upside-down.
We'll see...
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Old 08-21-2020, 05:19 PM   #26 (permalink)
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Wow, I didn't realize it had been a year since I last posted.

I started working on Chinook #1 again about 2 months ago.
I have a much better bellcrank design, and the custom turnbuckle rods work great.

Back on page 1, I mentioned that I had crashed Chinook #2 pretty bad.
I thought I had found the problems, but I hadn't found the main ones.

I discovered that somehow, a bunch of weird sub-trim numbers were in the DX9 set-up file.
I have no idea how they got there.

I noticed that the rear swash was doing some strange things when I was working on it.
Things like the right rear servo would be jacked-up higher just from rotating the frame a bit.

I have the 3 blade Gaui rotor head installed and I have modified the grips to accept 380mm blades.
This thing looks positively bad-ass with these blades.
I have the rear all set. All 3 blades track within .2 degrees all the way around the circle.
(I hang identical weights on the blades to eliminate the slop in swash / grips / balls / etc.)

Overall, I'm really happy with the way things are going.

Most days the winds are "Light and variable at 5 to 10 mph".
I guarantee when I get it in the air it will be "Gusty winds at 15 to 25 mph".

Pics later.
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Old 08-21-2020, 06:17 PM   #27 (permalink)
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Great to hear an update! I'd love to see some pix sometime.
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Old 08-21-2020, 06:51 PM   #28 (permalink)
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Thanks man!

I'll try to get some pics this weekend.
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Old 08-30-2020, 03:43 PM   #29 (permalink)
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Pics!!
(only a week late)



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Old 08-30-2020, 04:32 PM   #30 (permalink)
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Wow, those linkages look sweet!
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Old 08-30-2020, 05:32 PM   #31 (permalink)
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Thanks!
I think that set-up is about the 5th rendition.

There isn't much horizontal room at the rear, so everything had to be just right.
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Old 09-12-2020, 03:49 PM   #32 (permalink)
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Well, it's been windy ever since I mentioned trying to fly this.
Good thing I didn't bust my ass getting it ready.


I'm gonna buy a kite...
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Old 09-12-2020, 06:16 PM   #33 (permalink)
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I recommend the Prism Quantum 2.0

Flies great
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Old 09-13-2020, 11:33 AM   #34 (permalink)
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My theory is if I buy a kite, the wind will never blow.
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Old 09-13-2020, 04:50 PM   #35 (permalink)
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Quote:
Originally Posted by MariaFan View Post
My theory is if I buy a kite, the wind will never blow.
A small price to pay for perfect flying weather
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Old 09-13-2020, 05:04 PM   #36 (permalink)
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Quote:
Originally Posted by MariaFan View Post
My theory is if I buy a kite, the wind will never blow.
Quote:
Originally Posted by BuildFlyCrashRepeat View Post
A small price to pay for perfect flying weather
So true.
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