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HomeScaleAircraftHelicopterScale Model RC Helicopters › t-rex 450 scale head
03-10-2008 04:31 AM  10 years agoPost 81
eaglespirit

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Fayetteville NC

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Penta Blades
...think I'll stick 'round n' larn sumphin'!

helicopters, like bumble bees cannot inherently fly..according to Newtons law of physics

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03-11-2008 08:23 AM  10 years agoPost 82
mpcorley71

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Suisun City, CA - USA

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5-Blade head setup
Hi all,

I just got the lightning heli 5 blade head and mounted it on my 450. I have been following this thread for a while now, some great info. I was wondering if someone had a link, or some kind of summary for the preliminary setup of the head/pitch/phasing/etc. This is my first foray into multi-blade stuff and I found a lot of vague or conflicting information, and would prefer not to blow up the heli on the first spin up. I do have a csm cyclock and the gyro's for electronic stabilization, but am not sure if that is really needed on the smaller setup. (the idea is to get the hang of multi-blade on the smaller heli, then add one to my turbine powered century predator). Any help would be appreciated.

-Mike Corley

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03-11-2008 11:16 AM  10 years agoPost 83
jmb2232

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League City, TX

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Welcome to multi-land! I'm no expert myself but from what I have read here you would be better served to use the carbon blades rather than the "woodies". The carbons are a little heavier and the heli will fly better with them. I went straight to the carbons even though I had quite a few of the "woodies" lying around. Also, I made sure that everything was working correctly in pod & boom configuration before I put the mechanics in the fuse. Good Luck!

Mike B.

Watch this!!! THWACK!!! Honey, where's the checkbook?

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03-11-2008 12:09 PM  10 years agoPost 84
mpcorley71

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Suisun City, CA - USA

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RE: Blades
Yeah, I have a couple of sets of carbon fiber blades also, including a very nice looking set of ms composite 260mm blades that look much more "scale". I plan on testing the flying characteristics of all the different types of blades... once I figure out the "static" setup part

-mike corley

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03-11-2008 01:31 PM  10 years agoPost 85
Super-Hornet

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Singapore

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Welcome to the world of multibladed

Yup. Heavier blades are better. The Align Pro wooden blades are not as stable as those heavier one.

I do not try flybarless and/or multibladed on heli that is bigger than TRex450 but if I not wrong, actually smaller heli require higher stability assist than bigger heli. Of course u can fly without gyro assist but compare to with gyro, u will like with gyro flying than without.

SH

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03-11-2008 01:49 PM  10 years agoPost 86
doorman

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Sherwood, Arkansas

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Primary Set Up....
Well, here is what seems to be working for most here that have theirs flying....and both the 4 an 5's have the same set up..

Pitch Low 0 degrees
Pitch Mid +5
Pitch high +9
These are all approximate and fine tuned while you fly, but will get you going....
Phasing is 45 degree offset...
Blades.... the Heavier, cheap, 325 carbons by Align are doing a nice job... let us know how you make out with the lighter/shorter blades...
Make sure that you are nose heavy for testing... my rear skids come up 1" prior to the front of the skids coming off the ground...

Testing and learning to "fly" the head in pod and boom first is an extremely good idea....

As far as the mixer goes, most seem to be getting the "hang" of it without and having great success... I have seen no need for a mixer as of yet... but a windy condition may bring that beast into the light later in the season... mine has been indoors only so far....

Good Luck Stan


I am still waiting for my flying shots with the 4 blade head and tail...

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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03-11-2008 06:54 PM  10 years agoPost 87
seattle_helo

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Seattle, WA USA

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including a very nice looking set of ms composite 260mm blades that look much more "scale".
Mike, I have some of those myself left over from my Hornet days. They are nearly the perfect scale blade, I agree. At a scale event down in California last year I saw some 450 sized scale 500's flying around with those blades and they really flew nice and looked incredible. Apparently he had modified them, however, by adding weight (drill rod) to the first four inches or so of the tips. I've been meaning to do that with the ones I have here but have not done so yet. I think they may be too light to use out of the package and have that same performance. BTW, I'm talking about the already "weighted" E489 blades.

nick

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03-11-2008 07:54 PM  10 years agoPost 88
mpcorley71

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Suisun City, CA - USA

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Thanks for the info all! I do plan on testing with a training gear and in pod&boom, it's only in the body so I can figure out where the tail servo needed to be moved to. (and for the picture of course ) Does anybody have a simple procedure for checking the phasing without spinning it up and seeing if it flips over? The cyclock allows me to set the phasing in something like 1/10th of a degree increments, so I just need to know what to look for.

Thanks,

-mike

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03-11-2008 07:59 PM  10 years agoPost 89
seattle_helo

rrKey Veteran

Seattle, WA USA

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Mike, Peter Wales has a nice little write-up of how to check your head phasing here:

http://scalehelicopters.org/setting.htm

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03-11-2008 08:00 PM  10 years agoPost 90
eaglespirit

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Fayetteville NC

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multi head ANSWERED/CLOSED
I'm going for the 500MD w/ single tail rotor. Will I need to shorten the boom? Will the bird still fly with the tail rotor moving in opposite direction (up), if not, how do I change it?

helicopters, like bumble bees cannot inherently fly..according to Newtons law of physics

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03-11-2008 08:16 PM  10 years agoPost 91
coptercptn

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Mesa AZ. USA

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I had mine out Sunday to an indoor flight session and am still having a problem getting enough pitch.

I don't know if it's just the particular head that I got, but, even with the follower tight against the head I am not getting near what you guys are saying you are running.(pitch wise) It seems I need quite a bit of head speed to even get it to try and lift off. Then because the head speed is so high it is VERY twitchy and I haven't had the Kahonies to get it in the air yet.

It wants to pitch out quickly and when I try to correct it is so sensitive it goes all over...Not stable in any sense.

I don't think I should have to lengthen the blade links but maybe?

Right now I'm bottoming out (topping) the servos at the swashplate with the follower touching and topped out also...no more room to go up..? And still showing minimal pitch angle...any Ideas?

I'l try to take some pics and post them to show you what I have...

Home of the "Sea Cobra".....

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03-11-2008 10:23 PM  10 years agoPost 92
doorman

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Sherwood, Arkansas

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Not Enough Pitch!!!
coptercptn
Sounds like something is wrong with the length of your pushrods then... can you get enough added length with the ones that you have??? I think I may have opened mine up a couple of turns at each end, but nothing drastic....
The exposed rod between the ends of the links measures 38.44mm
Maybe yours aren't as long????
You should be able to lift off and fly around with a very reasonable head speed of 1850 to 2000 without any problems....

eaglespirit
If you use the Align fuselage you should not have to shorten the boom at all.... it is made for the SA/SE version heli's... as far as reversing your tail direction, just change the twist in your belt to get the proper rotation...
I really don't think that there is anything wrong with the blades spinning CW.... it is like that on my new Scout!!!! But most do seem to favor the tail spinning CCW...

Good Luck.. Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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03-12-2008 12:13 AM  10 years agoPost 93
eaglespirit

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Fayetteville NC

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multi head
Ok, so how do I change the twist in the belt? The fuselage is the FG model by ScaleHeli from RCMachines on Ebay.

helicopters, like bumble bees cannot inherently fly..according to Newtons law of physics

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03-12-2008 01:10 AM  10 years agoPost 94
Super-Hornet

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Singapore

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Hi eaglespirit

To have your MD500 spin in correct rotation to the real one... u need:
1. Change your one way bearing. This allow your main blades to spin CCW.
2. Change your motor spinning (swap 2 wires of the motor)
3. Flip the tail to the left
4. Check belt directions
5. Check servo and tail gyros.

Here is my Align MD500E with 5 bladed head and spin CCW (main rotor) and tail spin downward.


SH

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03-12-2008 05:51 AM  10 years agoPost 95
jmb2232

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League City, TX

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Well the wind finally died down enough that I could test fly with the fuselage. I must say that it was quite a different experience than in pod & boom configuration. When she lifted off tail authority was just not there. I had to set her down pretty fast (no harm done)or else she would have just been in a tail-sliding piro. I think my head speed is too low and I am going to add another ounce of nose weight which will put it at 4oz. Also, I am going to do the multi tail rotor like the one on Super Hornet's bird and see what happens. Needless to say my shorts went to the laundry room after I got back inside.
Mike B.

Watch this!!! THWACK!!! Honey, where's the checkbook?

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03-12-2008 10:50 AM  10 years agoPost 96
mpcorley71

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Suisun City, CA - USA

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Well, I got the static setup done and with the cyclock and 2 extra gyro's for electronic stabilization the balance comes out perfect... a bit nose heavy (as everyone recommends). Looking to maiden it on a training gear later today. Thank you all for the input. Will post pic's of the flight if I don't auger it in

-mike

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03-12-2008 04:45 PM  10 years agoPost 97
doorman

rrProfessor

Sherwood, Arkansas

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Replace Your Divot!!!!!!!!!!!!!!!
mpcorley71 just take your time and I am sure that all will be fine....I would like to know your thoughts on the CSM set up.... I am flying mine without and also have another flying buddy doing the same and they are fine without it.... they may take a pack or so to get used to, but really are not hard to fly at all....
So, make sure you don't dig any holes and let us know how it goes.... and when you post your pic's, some good shots of the CSM set up would be good too.

Thanks, Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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03-12-2008 07:07 PM  10 years agoPost 98
mpcorley71

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Suisun City, CA - USA

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RE: Replace your Divot
The CSM setup isn't so much because I think the 450 really needs it, it's more to get used to working with it so that when I go multi-blade on the larger predator turbine (which WILL need it) I have already "worked out the kinks" on the smaller and far less expensive to fix helicopter.

-mike

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03-12-2008 07:55 PM  10 years agoPost 99
doorman

rrProfessor

Sherwood, Arkansas

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Understood!!!!
mpcorley71 I understand what you are saying.... but I would like to see the set up that you are using... I am using Heltronix on my large scale models now, but have been reading up on the CSM.... good luck with those test flights.... Stan

AMA 2918-Team Spin Blades,,Castle Creations, Unique Aircraft

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03-22-2008 08:31 PM  10 years agoPost 100
Rodan

rrVeteran

Prescott Valley, AZ

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OK folks... Super Hornet knocked it out of the park again!

He started a thread on weighting Align woodies here: http://www.rcgroups.com/forums/showthread.php?t=836351

It explains his method, which I used to add 3.5g weights (1/2 of a 1/4oz stick on weight) to 325Pro woodies on my EC135.

It turned it into a WHOLE NEW HELI!!

I was ready to go back to a flybar head because it just wasn't fun to fly. The additional stability gained from adding the weights has vastly improved things.

If you're flying a scale head on a TRex 450, you need to do this mod!

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HomeScaleAircraftHelicopterScale Model RC Helicopters › t-rex 450 scale head
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