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Thunder Tiger 30/50 Raptor 30, Raptor 50 Helicopters


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Old 03-05-2012, 10:55 AM   #1
djaypro
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Default dx 7 raptor 50 titan curves

Me and my buddy did some settup yesterday and ran into some pretty steep curves also only got +7 -7 on pitch. What curves do you use on a dx 7? We spent 2 hrs. on set-up at the field and got it off the ground and flying but I would think my pitch would be a little better. I have all my linkage at 90 and rods measured to factory book setting 3D.
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Old 03-05-2012, 11:13 AM   #2
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Mechanical mixing?
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Old 03-05-2012, 12:10 PM   #3
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Assuming mCCPM, if you're already in the 3D setting, you have two options for increasing pitch. Both involve increasing travel.

One is to adjust the endpoints for the servo you want to increase the throw for. The other is to move the position of the ball on the servo. If you want to increase throw, you would move the ball outward. Do it one hole at a time.

This could result in a balance of ball placement on servo horn and endpoints. For example, if your current setup requires you to increase endpoints but you still can't get enough pitch, you would then move the ball on the servo horn outward. If that gave you too much pitch, you would decrease endpoints. You need to find the right balance between the two.

Generally you would run a pitch curve of 40-45-50-75-100 in normal mode. In Stunt mode 0-25-50-75-100. You could also use the linear curve for normal mode depending upon your preference.

Hope this helps.

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Old 03-05-2012, 12:24 PM   #4
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We Moved the ball on the horn in to book position 10.5 mm and moved the arm off of what I thought was 90 at mid stick to get +7 -7. Also increased travel pit to H 120% L 150% Where do you find machanical mixing?
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Last edited by djaypro; 03-05-2012 at 06:40 PM..
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Old 03-06-2012, 03:07 AM   #5
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Hi,

I get 10.5 degrees both ways with a perfectly liner curve, 0: 25: 50: 75: 100, with 0 degrees at 50%. You need to get the heli perfectly setup mechanically before setting up and relying on the TX to tune out a bad mechanical build.

You need to get your L and R travel exactly the same with 150% ether side. Before getting started you need to program a perfectly linier corve into the transmitter and then use this curve to set up the heli with 0 degrees at 50%.

If you check all your link lengths as per the manual you should easily achieve a good mechanical setup. When you start out make sure your TX trims are at center and that your sub trims are set at 0. Also check out this very easy to use web site for horn lengths and link lengths: http://www.raptortechnique.com/

A well setup heli will require no sub trim (or very little) with no trims running on a perfectly liner curve for pitch with even end points.

Remember a will setup heli will be a pleasure to fly so take your time with this as the rewards will be huge.

Hope we can help you get her sorted out!

Last edited by Tristin; 03-06-2012 at 03:18 AM.. Reason: Just saw previous post...
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Old 03-06-2012, 09:57 AM   #6
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Thanks Tristan
My guess is to go back and check all my horn lengths. It is off the ground but with 7+ and -7 pitch. It's not flying up to it's ability for me. mechanical mixing is something Im not knowledgeable yet in, Im not sure if this is something I need to adjust, in my dx 7 nor do I know were to adjust it in the tx. Also put a gov. on it and have another thread on that.
Everything is moving free and all lengths are measured to book but could'nt get the pitch with the book settings. We started at linear but couldn't get 0 at mid til we moved the ball on the horn on the pitch servo and adjusted the curves. We found the curves were looking pretty weird with a big drop at mid on the v-curve as you see in the picture also the change from normal to stunt has a fairly large difference making the heli drop. Also engine is over reving at full collective (top stick). Hopeing the gov will fix this. I know my horn length is right on pitch. Are things different in the 30 v-2 manual cause I did the conversion a long time ago. As far as I know the lengths and stuff are the same but I don't have the titan book.
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Old 03-06-2012, 11:51 AM   #7
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Here is my method. I got my servo all setup nice and straight at 90 deg. Then I used my homemade swash leveler to setup the linkage rods.

I made a swash leveler out of a 1" (26.5mm) X 5/8" (15.75mm) bolt (I used a steel hardened bolt but if you can find a aluminum one it would be easier to cut and grind). I cut a gap in the bold so it would fit over my main shaft and ground out the center so it would fit over the main shaft stopper.

This allowed me to setup the swash exactly level with the top of the frame and the pitch controll arm center divet aligned up with the center divet on the frame. This gave me a good level starting point. Here is what it looks like.



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Old 03-06-2012, 12:00 PM   #8
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Hi Again, you don't want any mixing. Got through the setup again and again, believe me it takes time but once you got it you'll never look back. You need to work systematically through the whole setup moving through the different steps in the correct order.

1. Set a liner pitch curve 0: 25: 50: 75: 100 on the TX and use this curve while setting up the heli
2. Double check all link lengths.
3. Make sure the servo horn is at 90 degrees to the first set of links.
4. Set 50% on the transmitter (center stick and and make sure you have 0 degrees pitch) if shes slightly out adjust the short links on the head to assist you to get 0 degrees on each blade. Trims and sub trims always at 0.
5. Once you have 0 in (center stick) we then setup the outer limits or end points.

I could post some pics tomorrow that could help you should you need more help.
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Old 03-06-2012, 12:05 PM   #9
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+1, TR911 that will help a lot to get the swash leveled off perfectly. See mine cut up an old Raptor one way bearing and now have a nice swash leveling tool.
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Old 03-06-2012, 12:43 PM   #10
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Hi again,
Remember you ultimately need to setup four different systems on the heli to get her flying perfectly and each system must be setup individually. First setup the pitch as explained above, then move to the cyclic (ailerons) then we will move to throttle curves and later tail.

Why the throttle last? because a well setup heli will require less power and have a smother power demand compared to a heli set up with an exponential curve especially if not flown hard 3D, smother power demand running with a linier pitch curve will compliment the gyro resulting in a more stable heli a better controlled tail and a easier to fly.

Why setup a liner curve (0: 25: 50: 75: 100) if one does not fly 3D? Remember after setting up the linier curve with 0 degrees in the center and 10.5 degrees on each end will mean you have good mechanical setup for the pitch. Once we have set this up we can program any curve into the transmitter and no mechanical changing will be required on the heli as the basic setup with 0 at center and maximum travel 10.5 degrees on each end would have been done. With this setup future fine tuning becomes easy. Normal flight curve as well as stunt one and stunt two can then be programmed easily.

I hope this all helps and makes sense?
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Old 03-06-2012, 02:03 PM   #11
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Thanks again Tristan
That leveling tool is right up my ally. Im gonna make one like yours. I think Im getting it according to what you said. Gonna get this thing right being I do bang the sticks hard and am getting pretty good at collective management. Like you said I won't regret it. I hate to adjust things after my friend helped me alot to get it the way it is in the field but have to get it right and he flies futaba not spektrum and does'nt know the 401 gyro.
My buddy who has more experience than me thinks something is not right mechanically. I have went through the whole heli excluding the tail set-up. I am lagging with the transmitter setup.
You made things real clear and I think I can take this knowlege to the bench.



Thanks again
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Old 03-06-2012, 02:28 PM   #12
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Tristin, Hmmmm I did not think of that... (good sharing)..
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Old 03-21-2012, 08:07 PM   #13
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I finally figured out my problem with pitch It was my pitch linkage set to 90 degrees. I found in the book to make it horizontal. thought horizontal ment 90 deg. when I made the horn straight center on the servo problem solved.
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Old 03-22-2012, 12:18 PM   #14
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Hello Everyone,

I hope I'm not hijacking the thread too much, but I've got a pitch question also. I have the Raptor 50 Titan SE using it with a Futaba 7c tx. I've followed the raptortechnique build as closely as possible. I can get +/- 12 or more pitch but in the transmitter only using 60-65% servo travel. Raptor technique says I should be at around 100% up and down stick. The Titan SE has push/pull and raptortechnique does not. So my main question is it more important to keep within 5% up down on sticks as he says or just keep the positive and negative pitch angles the same? I have used a spacer like others have shown here to achieve 0 deg at mid stick, I've tried moving ball links between the two available hole on elevator arm and still no luck past the 65% total servo travel. Hopefully I didn't put anybody to sleep with my rambling. Thanks in advance

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Old 03-22-2012, 09:35 PM   #15
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Check and see how far you have the linkage balls out from the servo horn. Should be around 10mm.
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Old 03-23-2012, 01:55 PM   #16
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Thanks TR911, I will give that a try.
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