Marius' learning to fly - "video diary"

[Tony]

Re: Marius' learning to fly - "video diary"

Send that sucker to me, I will put it in the air!

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It would get me flying again anyway lmao.

 

[stokke]

Got my spares to today.

A small comfort in the midst of this minor tragedy; the new mounting bracket for the vertical tail fin is of metal instead of the standard plastic one

New fancy metal to the left, old crap plastic to the right. LOL

Sweet.

Stupid 1.5mm hex broke
Luckily I also have my 1.5 from Align.
Just shows Align makes good tools as well.

After a few hours of assembly - she's ready for test flight

It's become dark and really cold outside, but I had to check if she would fly! I took the bird down to a storage building where there's OK outdoor lighting. She spooled up OK, but something feels off... More testing tomorrow.

 

[Tony]

Just for reference, there is nothing wrong with the plastic holder. It just locates the tail until you tighten it down then the friction will hold the tail and keep it from twisting. The aluminum (aluminium? lol) does look better though.

 

[stokke]

Just for reference, there is nothing wrong with the plastic holder. It just locates the tail until you tighten it down then the friction will hold the tail and keep it from twisting. The aluminum (aluminium? lol) does look better though.

The only reason I got the holder, was because the two long bolts which secures it was all crooked.
Yes, it's probably aluminum

 

[Tony]

We say Aluminum, over in Europe they say Aluminium, same with Australia. Either way, it's time to get that heli back in the air!

 

[coolgabsi]

Got my spares to today.


Stupid 1.5mm hex broke
Luckily I also have my 1.5 from Align.
Just shows Align makes good tools as well.

It's become dark and really cold outside, but I had to check if she would fly! I took the bird down to a storage building where there's OK outdoor lighting. She spooled up OK, but something feels off... More testing tomorrow.

While the bird looks amazing bro! I want to ask you, have you weighed those blades. I got the same pair. Actually my first Align pair of 325 blades ever, and i weighed them and to my surprise, they were off by .2gms. One was 26.66gms and other 26.40grams. I was shocked cause cheap Carbon fibres like hobbypartz are perfectly equal weight and cg most the time.

But did you notice that in your blades? I have kinda always asked ths question, how much is to much.. may be you or someone else could enlighten me (and everybody) with that info .. I hated to put the red "Pro 3D tracking tape to balance them cause it takes away from the looks of the blades. but just wondering if its productwide or just mine were like so. let me know!

 

[stokke]

I want to ask you, have you weighed those blades.

I did measure them on my GF's digital kitchen weight, they both weigh 25g each. Don't think the weight can read mg though... But close enough for my part.

 

[breeze400]

Re: Marius' learning to fly - "video diary"

Sometimes the blades are right on and sometimes there not! Lol that's the way it is!

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Ps. GABA use clear cello tape and you won't even see it on the blades!

 

[stokke]

Re-did the DIR and tail set-up again.
Checked pitch again.
Everything seems to be in order.
Bird flies as before

Just messing about, doing a bit inverted. I didn't feel very comfortable as it's getting very cold, I'm loosing daylight and there's a very strange loud sound coming from somewhere (not the bird) LOL. Anyways, it's all good

Flight 74, learning to fly. T-Rex 450 PRO 3GX - YouTube

 

[coolgabsi]

Ohh nice! bird flies nice!! good flying...


PS: seems to be running an awfully high head speed. What pinion and main gear are you running? Have you calculated your headspeed yet?

 

[stokke]

Ohh nice! bird flies nice!! good flying...

PS: seems to be running an awfully high head speed. What pinion and main gear are you running? Have you calculated your headspeed yet?

Thanks, Gaba.
I'm not running GOV, but I have been pondering the thought. Currently I'm running curve (100-95-90-95-100), and don't know what HS she's getting. Pinion and gear are stock. I'll look into the GOV set-up.

 

[breeze400]

Looking great Marius! Shy looks like nothing ever happened to her! Lol

 

[coolgabsi]

Your head speed is


With 150tooth main gear (stock straight gear) and 14t pinion on the bl450mx (3400kv ) motor at 90percent efficiency

Start if flight batteries at 12.6 volts full charge
At 100percent throttle : 3608 rpm


At the end of flight about 11.4 volts (just a guess I Don't know how low your battery gets) : 3206 rpm

The lower rpm you run (to a limit of course) gets you higher torque and better battery life and motor and batteries won't come down too warm.

You have kinda seen how I fly, I am putting helical heat system in mine, and targeting 3200 max rpm on my high charge 12.6. At low battery ill land at around 2950 or so.

Calculation ::

(Battery voltage x motor kv ) - 10 % = motor rpm (say A)

Main gear tooth count / pinion gear count = gear ratio (10.7 in your case) (say B)

Rpm = A/B

Now these calculations will give you your motor's rpm at 100percent throttle straight. Rest is simple math getting if down to what percent throttle you are running .

 

[Adam]

Mine is the same all stock gaba. It is sweet thats why i wanted your motor for the hk instead of that dynam because when i fly this bird and then i fly the hk the hk sounds like a wimp and the headspeed sucks.

 

[coolgabsi]

Yeah Adam. You'll like it.


The motor you are getting is a bl450m 3500kv motor the motor Marius has and probably you have is bl450mx 3400kv. So calculate accordingly.

But yes you'll feel a ton more power in that bird with this.

 

[Adam]

Oh ya and excellent job marius that bird is just as stable as it was before. I still say everytime we reruild they get better and better or maybe we just learn from our mistakes.

 

[stokke]

Oh ya and excellent job marius that bird is just as stable as it was before. I still say everytime we reruild they get better and better or maybe we just learn from our mistakes.

Thanks, Adam
I hope I don't have to learn any more any time soon LOL

___


I read the instructions last night, and now I know how to set up the GOV on the Align ESC. If I get the time, I'll check it out today.

 

[Tony]

There should be no reason for you to use a Gov on that heli. Worth a shot to try it out I guess, but I wouldn't use it.

 

[stokke]

There should be no reason for you to use a Gov on that heli. Worth a shot to try it out I guess, but I wouldn't use it.

Yes, I just want to check it out. My JR will be using GOV, so I need to get familiar with setting it up (even though the JR's GOV will be a lot more advanced).
I'm also trying to get rid of an effect which happens under a specific maneuver, something I think is called "bogging" - maybe the GOV will handle this better than curves?

 

[Tony]

Maybe. If you set the Gov at about 90%, then that will give you 10% to add to it for some more power when it needs it. But it will reduce head speed and reduce stability. Not by much, but it will.

And the Gov on your other heli is for a nitro correct? That is totally different to keep the engine from over revving.