Logo500 3D Build Videos

[Destin]

At 14:20 of that video you say next section will be tail servo and push rod ... but it isn't.

No biggie - I was just wondering about the tail servo arms being too long (the Mikado arms for Futaba servos). Mine is hitting the top of the frame. Did yours?


Update: Oh... must be in step 12

[Finless]

Hmmm interesting... Your right. I missed shooting that part. However if you look at the Solid G gyro setup here
http://video.helifreak.com/?subpath=finless/logo5003d&filename=step12_tailgyro.wmv

You will see about 1/2 way in that I did trim the servo arm so it didnt hit the bottom.

Bob

[Finless]

OH MAN.... I gotta say flew the snot out of my logo500 today... Pack after pack.

550mm blades are the way to go. I HAD to mod my JAZZ ESC with a heat sink though and even then it is still getting hotter than I like but I think it is now in the "safe" zone.

Needless to say I have a new 500+ sized heli that I FREAKIN LOVE...
Control level beyond expected with 550's and SMOOTH....

Also it took me some flight time to get use to how freakin LIGHT this heli flys! I was over pitching being use to heavy helis like the 600E. MAN once I started getting dialed in with the feel of this thing... HMG... PURE LOVE!

Bob

[Brighton40]

Bob - do you think upsizing the ESC would help with the 550 blades, or would you use a smaller pinion and let the motor spin faster to unload? I suppose what I am getting at, is if there is a change that could be made in the build that would help allow the 550's to be used without issue?

Thanks!!!!

[Finless]

This weekend I tried a 15T and 14T... Didn't like the performance. So either put a heat sink on that Jazz or get a larger ESC or a different motor....

Now that I have put a heat sink on my Jazz even though it gets to 140F with the heat sink, I now it will be alright so that is what I am sticking with!

Bob

[BruceW]

So what were your TCs set at when running the 15T? I'm running 86% in idle 2 with 15T and getting 2320 head speed which seems to be a good balance.

Also, what HS did you have with 16T and TC setting?

[Finless]

I did not want to push my TC for gov mode beyond 80%.. Sorry I don't think that is a good idea myself. How can the ESC govern at 86%? That gives it only 14% head room. I left them at 80%.

Maybe wrong to do but was my thinking when I did it. Maybe the jazz an handle more but if so I bet HEAT is the outcome along with bogging? No?

Bob

Bob

[BruceW]

Well my HS seems fairly constant at 86% with a 15T and does not bog. It can do constant tic-tocs (10+) with very minimal change in HS (based on sound). I personally think that 86% is enough head room when the motor is geared down more and allowed to run faster. When I ran 16T (80% on Jazz) everything seemed to run quite a bit hotter but with the same perceptive performance. Maybe I'll need to try 16T again since there will be a better comparison after running the 15T for so long.

EDIT: On 16T I was seeing about 140F on the ESC and with 15T it runs about 120-125F.

[Finless]

Hmmmm OK... Maybe I will try 15T again and try 86%..... Seems odd to do that but what the heck! I got the pinion and I can easily set for 86% :)

Bob

[BruceW]

When I did my first maiden with the 16T I tached the head speed with both the 16T and then 15T and found that the Jazz ESC is producing a mostly linear increase in head speed from 65-85%. The difference in HS without changing the TC is about 150 RPM when changing one tooth size but there is a huge difference in heat. Looks like you might have been running around 2400+ head speed on 16T at 80% :wow2:

HS on 16T -
65% - 2190
70% - 2250
75% - 2350

HS on 15T -
75% - 2190
80% - 2250
85% - 2310

Here is a link about the history of my experimentation with pinions and TC.
http://www.helifreak.com/showthread.php?t=54057

But it wasn't until I went to +/-13 pitch and +/-7.5 on cyclic that performance really jumped.

[Brighton40]

BruceW - are your quoted HS #'s with 550 blades? Or all with the Rotortech 560mm?
Bob - what 550 blades have you been trying out?
Thanks,

[BruceW]

Rotortech 560mm blades.

[Finless]

My head speed with 16T 80% and 500mm blades was 2350. So I did tach it. The ESC never got how with 500mm blades.

When I went to 550's (Raptor 550's so you now) the head speed was the same. Remember the Jazz gov is in effect here! To help with heat I dropped my TC to 75%. I did not tach the head at 75% but still got a lot of heat on the ESC (145F).

This weekend I will try 15T again and 85% TC. I will tach the head too and see what I am getting.

Bob

[buster1]

Bob, I am running the 15T pinion with the Z30-1150 motor with Jazz controller and rotortech 550,
at around 75-80% I am taching 2250 and now heat problems whatsoever,
I am going to try the rotor tech 560's shortly, as I just got a pair

Bob, I had another question - I am not sure how to figure it out - when I hit throttle hold on my DX7 - all setting seem correct. Anyway, when I hit throttle hold in a hovering auto after a flight - I seem to be losing cyclic control. Have you seen this with the Logo or is there something wrong with my settings in the DX7,

I know how to set it up and experienced flyer - I have not seen this before - I am going to try and hit throttle hold with zero pitch on the ground and see what happens tomorrow, but I am at a loss of why I am seeing this,

any thoughts,
Jeff

[Finless]

Weird.... never heard of that? Does it do it on the bench? e.g. plug int he heli while in hold. Do the servos move?

Bob

[buster1]

its fine on the bench - but I will check again,
maybe because the heli. is so light, I am bleeding off too much head speed and the blades are losing authority - it happened on windy days - but I have not taken it up for an auto, because I don't want to chance losing control - I will try it on the bench again and see what happens,

Thanks - isn't the logo 5003D a cool heli. - I love it - as it has the best power to weight ratio.

Jeff

[Finless]

What you might want to try for a real auto is set your HOLD to about 15-20% throttle and try it. This way you can bail out without going back into soft start.

Yes loving my logo man!

Bob

[Mercuriell]

Have you any PRGMIX dialled in - I had a nasty experience when I tried some throttle-aileron mix on the 9303 - when I was spooling down on my T600N I hit throttle hold and it input full lateral cyclic -> Mother of all boom strikes - turns out the mix defaults to 100% input but I still haven't figured out how it got onto throttle hold as I set it up only on idle1

[buster1]

that is a good suggestion - I will make sure I don't have any mixes programmed in by accident - thanks for the heads up!

[electro]

Bob,


Do you have plans to make a video for the V-bar setup?

Juan

[Finless]

Not unless Mikado wants to send me one to do. I don'tt have the coin right now for the Vbar system.

However, I do plan to do a setup/review on the new $300 Robotics SK360 system though.

Bob

[Big Fil]

You gonna do it on the L500 or a different bird. My plan has been to go V-bar by this summer but if this system is good it'd definately be an ease on the wallet.

[Finless]

I may try it on a Trex500 first and then the L500....

Bob

[fireup]

Not unless Mikado wants to send me one to do. I don'tt have the coin right now for the Vbar system.

However, I do plan to do a setup/review on the new $300 Robotics SK360 system though.

Bob

So, is he sending you one then?:YeaBaby:

[Finless]

Yes it looks that way :)
But I ain't counting the chickens yet!

Bob