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5 Blade Hughes 500e Turbine Heli Vbar question.

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5 Blade Hughes 500e Turbine Heli Vbar question.

Old 01-02-2020, 11:32 PM
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Springbok Flyer
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Question 5 Blade Hughes 500e Turbine Heli Vbar question.

I have been flying my Hughes 500e since 2010 with a flybar and Futaba 401 gyro. Some years ago I bought a 5 blade setup and a Vbar. At the time I had acquired a E700 with a Vbar and thought it might be great to go for a Vbar and 5 Blade head on the 500e. But, I have never actually done the conversion.

Will it work (I realise my Vbar and heli is quite old)? If it is worth the risk, what advice can you guys give me.

Thanks,

JanR
Old 01-03-2020, 04:51 AM
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My first advice is to only post this one place, not every forum

Yes it should work.
Old 01-03-2020, 01:06 PM
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Originally Posted by BarracudaHockey View Post
My first advice is to only post this one place, not every forum
Did not realise that I did? Where are the other posts, then I will delete them.

JanR
Old 01-03-2020, 02:23 PM
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No worries, already handled, but yea there were posts here, multi rotor, and somewheres else.

VBar was high tech when it came out, not as easy to setup as a Demon Axon but they do work
Old 01-04-2020, 12:06 AM
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Andy,

So do you think I should get a Demon Axon? What about a iKon?

Thanks,

JanR

Last edited by Springbok Flyer; 01-04-2020 at 12:19 AM.
Old 01-04-2020, 04:57 AM
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if you're asking me which FBL I would use in a scale heli conversion there's no question. AXON

I just converted an old Hirobo Cobra to FBL and my Vario/Starwood OH-58 both use Axons.



Old 01-04-2020, 12:25 PM
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Beautiful heli's.

Thanks,

JanR
Old 01-07-2020, 01:45 AM
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I was wondering if anybody may be using an iKon2 or Demon Axon with a 5 blade setup? If so, how did you program your unit for 5 blades, as I cannot find any instructions on either, to do that. Or if by chance anybody is using a Vbar Blueline (or similar) to control a 5 blade setup.

Thanks for your advice.

JanR
Old 01-07-2020, 05:26 AM
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The Axon doesn't care how many blades you have, its the same programming whether you have 2 blades or 10
Old 01-07-2020, 01:34 PM
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Andy,

So when you go from a 2 blade setup to a 5 blade setup - do you set the blade pitch the same or do you use less pitch? With the 5 blade, do you need more tail response or does it stay the same? I'm just looking for a starting point in relation to what I have with my 2 blade setup.

What about gains, I am use to old school tail gyros, how do I approach the gains on one of these?

Thanks,

JanR
Old 01-07-2020, 03:37 PM
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You approach the gains the same way, use the default (which works pretty well in most cases) and bump up from there till you get some shimmy then back it off.

Same with the tail.

As for the heli itself, the 5 blade head will provide more lift so you'll probably need a bit less pitch or you will find it sensitive in the collective range, same with aileron/elevator throws.

Thats the nice part about the Axon, when you go through the wizard it will walk you through nearly everything you need to do including some default gains for different style setups, blade sizes etc.

Tail response on my 4 blade 58 is about what my 2 blade Jet Ranger was but a lot depends on the servos you're using, tail blades etc.

I'll tell you this, having done this a few times, if we could hang out at the field I could have you setup in about 15 minutes of flight time or less.
Old 01-07-2020, 08:02 PM
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Andy,

You are very convincing. I was thinking that the lift will be greater, so what you're suggesting make good sense. The advice regarding gains also make sense. As for the tail, I currently have a 310mm tail rotor diameter, but I do have some longer and wider tail blades that will increase this diameter to 370mm. Would you fit these tail blades?

Thank you.

JanR
Old 01-08-2020, 04:52 AM
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You're really going to have to just test fly it and see how it feels. I dont think its going to inherently need more tail authority just because you switch to a 5 blade head.
Old 01-17-2020, 01:51 AM
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Hi Andy,

OK, I've bought myself an Axon. Now the questions start; how do I know what the Hz value of my Futaba S9551 and BLS571SV servo's are so I can do the servo setup? Also how do I choose 5 blades, it only goes to 4 blade setups? Even when I go to the one 4 blade option that has a swash plate setup like mine, it only allows for one elevator servo, not two?

I'm sure you can feel my frustration.

JanR
Old 01-17-2020, 05:01 AM
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What is the servo setup on your heli? 3 servo CCPM?
Old 01-17-2020, 07:13 AM
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Digital-1 for those servos will work fine in a scale setup.

Where you do see it asking how many blades? I went through all the settings and didn't see that question and honestly it doesn't matter unless we have to fool with your swashplate phasing.

Model size is going to be 500-800 and flights style to Normal/Scale

What mechanics do you have or what is your servo setup on the swash?
Old 01-17-2020, 03:11 PM
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Andy,

I have Airstar/Vario mechanics;
- The swash plate has two aileron servo's and two elevator servo's. Between all of them they control the pitch. This look like I should choose the H3/H4-90 option. But when it come to selecting the servo's, I cannot see how I can select 2 x aileron and 2 x elevator and no pitch - unless the servo section is meant to be the transmitter channels (not the servos).
- The rotor disc is 1.8m, so don't you think I should choose the GT&1.8 size?
- So you think I should use the 166Hz servo setting for all my servo's?

Thanks for your help, really appreciate it.

JanR
Old 01-17-2020, 04:06 PM
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I'll admit you're getting into something I haven't personally done but we should be able to work through it.

First, set your transmitter to single servo. (I'd create a new model so you still have a model with your old settings)
H3/H4 90 is correct in the Axon
Then configure the servos plugged into the Axon as shown in the H3/4 diagram 1 and 2 are left and right aileron, 3 and 4 are back and fore elevator respectively.
The model size isn't a big deal, it just adjusts agility and the differences are subtle.
I looked all over the internet and couldn't find a safe refresh rate for those servos but Digital 1 will be plenty fast for scale flying and a known safe setting so you don't over heat any servos..

After you get that setup we use the Axon config to reverse the servos so they are all moving up and down at the same time with pitch, then we use the function setting to get them moving the correct direction.

Last edited by BarracudaHockey; 01-17-2020 at 04:10 PM.

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