View Full Version : Direct To Swash (DTS) mod

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06-16-2008, 09:36 AM
thank you .!!!

greetings from holland !!

06-16-2008, 09:53 AM
En de groetjes uit Belgie


06-16-2008, 11:23 AM
hahahahhhaha, :arggg:

07-09-2008, 02:12 AM

I can see why you do such great vids to help us Thats a great mod.. I have my Belt -cp spread all over my work station waitin for parts and ideas.. and You just put a fine one in my head... Thank you Sir...

07-10-2008, 12:41 AM
Enjoy the mod :thumbup:

07-23-2008, 05:35 PM
so i have my new g-10 helicopter "blank" frame built. I say it is blank because I have everything mounted on the helicopter EXCEPT the servos. I have to cut out the servo holes still. I have them all marked out just need to find the time to finish final cutting on the frame.

AND I HAVE FIGURED Out how to use the FACTORY TX with hitec servos ( reverse rotation) without doing any funky channel swapping.

I am actually still using the esky carbon lower frames because the g10 is heavier and it simply didnt need the strength of the g10 to attach the landing gear and battery too.

I havent got pictures but as soon as I get the servos cut in and the heli all put back together, I will get some up asap. So for now, we must wait.

08-24-2008, 06:48 PM
So here it is. Ive been flying it for about 3 weeks now. Yesterday I found a really cool flying spot to try out my new 22c desire power 1800 and apparently it allowed the esky esc (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=5300) to get a little more current and you can guess what happened to it. (Hint: melted solder and cracked ic chips) Luckily i was doing a tailspin in a hover and not circuit flying. I was able to run to it and yank the battery out before it caught fire. So im waiting on align black 325 pro blades, an align 430l and esc package, a hitec 65hb and a pack of the hardened stainless main shafts from us hobby supply. It should be pretty kickass with the new motor and esc.

The lower frame section is the stock lower frame from the carbon edition. The upper frames are cut out of 1/16" thick g10 i got from mcmaster.com. The stock upper frames were laid on the g10 and traced out adding more material where the servos were placed. once cut on the table scroll saw and the edges smoothed out the peices were taped on top of each other and the stock peice taped on top of it. It was drilled like this so all holes were precisely placed. Then I put the frame together and placed the servos then took it back apart and cut and drilled for the servos.

It just so happened that the way the servos were placed, required the servos to rotate in opposite direction of stock. I was able to use hitec hs65hb's with the stock transmitter and receiver. Its this reason that I havent purchased a 6ex yet. ( i know i really really need to)

Other than the dts upper frame, it has; cnc (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=4750) v2 head and cnc tail; g10 vert. stab.; carbon fiber:paddles, tail rotors, boom, hor. stab.; blade 400 (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=6136) main gear; cnc aluminum: bearing blocks, motor mount, hor. stab. mount, tail servo mounts, boom holder clamps with gyro platform; yellow align landing gear and skids; hitec hs-65hb's for cyclic; futaba (http://www.rcuniverse.com/buynow/keywordclick.cfm?bid_id=5021) s3114 for tail; esky rate gyro; desire power 1800mah 22c lipo; stock esky rx & tx; will have align 430l 3550kv motor and align 35a esc.

Im getting about 10+/10- with the stock transmitter. When I can get the servos to throw more i can get 12+/12- easily if not 13.
It weighed out to be 690 grams with the esky esc and motor and esky 1800 battery flight ready. The desire power is quite a bit lighter than the esky.

Is that weight ok? Ive read that 450 trex's weigh in between 700 to 760 grams flight ready.

http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp001.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp001.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp002.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp002.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp003.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp003.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp004.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp004.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp005.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp005.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp007.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp007.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp009.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp009.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp010.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp010.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp011.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp011.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp012.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp012.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp013.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp013.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp016.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp016.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp017.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp017.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp018.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp018.jpg)
http://i485.photobucket.com/albums/rr214/onehot69stepside/th_beltcp019.jpg (http://i485.photobucket.com/albums/rr214/onehot69stepside/beltcp019.jpg)

08-25-2008, 12:36 AM
Very nice work onehot69stepside and thanks for the report :thumbup:

08-25-2008, 04:37 AM
WRT the model weight, a lot depends on the battery, for example, the stock Esky 1800mAH weighs 163g, I have a pair of 2100mAH which are 193g, and my biggest is the loong Max 2250mAH which is 187g. My batteryless model ready to go is 610g, but in addition, I have a BEC and a Lipo monitor, which will add to the weight. Anything around 750g flying for a Belt is about right.


08-25-2008, 05:47 AM
I agree with Mike, few 100 gr will not make much, the only thing that will be noticable is the flight-time will reduce a bit.
I have tested the Belt with a lead weight of 500gr for hovering in windy conditions and I know the Belt can just about liftoff with 1.3Kg strapped to its belly :woot

08-25-2008, 02:01 PM
Thank you very much for the compliments all.

So i guess im doing pretty good then if it weighs 690 grams with the stock esky 1800 in it. My new desire power 1800 weighs in at 130grams so that would make it weigh 660 grams with the desire power in it.

I need a cool canopy to balance out the front, I have to weight the stock canopy when i put the desire power in it.

09-01-2008, 03:00 PM
Can anybody please tell me whether the 3x servo ball points need to be in the same place on all 3x servo horns?

Ive noticed looking at several pics of this mod that most have a shortened front servo horn (when using the SG90 and white horns) to prevent it fouling the back of the motor.

I wondered if this meant that I would need to make sure the other 2x servo horn balljoints were in the same mounting hole.........


09-01-2008, 05:49 PM
Hi Tableleg
All 3 pionts are at the same distance as the esky servo's about 12mm from the centre.
The front servo horn is cut so that it won't touch the motor, I think there is a 2mm gap between motor and servo-horn, I cannot verify because I am rebuilding mine

09-02-2008, 12:56 AM
Hi Tableleg
All 3 pionts are at the same distance as the esky servo's about 12mm from the centre.
The front servo horn is cut so that it won't touch the motor, I think there is a 2mm gap between motor and servo-horn, I cannot verify because I am rebuilding mine


Thanks very much for the reply.


09-02-2008, 03:13 AM
Hi, on my second DTS mod, I put the pitch servo as close as I dare to the main shaft. This enabled the maximum amount of servo arm length and hence the maximum amount of angular input to the swashplate. Yes, it is desireable that all three swashplate servos have the same throw.


09-10-2008, 05:47 PM
If your servo arms a different lengths then when you change pitch the swash will not stay level and then the heli will be stable. :shock: Not much fun.

10-12-2008, 09:33 PM
just finished mine. I'll try it out tomorrow when i get my new tail servo in. i tried to remove as little of the frame as possible to avoid flex. left one of the angle braces and cut the other. alignment to the swash is not perfect, but it's better. at least until i pick up one of those sweet exi's. the 450 pro v3 caught my eye.:YeaBaby:http://i22.photobucket.com/albums/b336/Morfius-/P1010422.jpghttp://i22.photobucket.com/albums/b336/Morfius-/P1010426.jpg

10-16-2008, 02:55 AM
Just realised I hadn't posted any details of my DTS mod on this site.

I used a slightly different approach from the other mods on this thread. I only did the back two servo's because on mine the front link is smooth and slop free so I didn't reall see the point. Instead of using stock brackets I fabricated my own from a plastic condenser cover
from a car radiator but any suitable plastic or ally angle section would do as well.

The plastic is Just over 2mm thick and is very strong, it feels like the same stuff the frame is made of which seems to be standing up to my beginners knocks really well.








I feel the overall appearance is better than the off the shelf brackets as the 90 degree
angle looks part of the heli and not like an obvious add on.

I may make another pair with slightly different dimensions, if you notice the servo's are set a little wide in the mounts on these.

Also the UGT 05 swash plate I used is very wide and throws the links out of line slightly.
It's not enough to adversly affect its function but If I can find a smaller one with the AR pin on the right side I will be able to reduce the servo throws accordingly and that will reduce any differential induced negative expo caused by the servo arc..

Still I am pleased with it for a first attempt and it only took a few hours to do.

The heli definately flies much better with the mod:thumbup::thumbup:

All the best Ian

If you do a DTS mod, do you have to change settings in the Tx? I use a Spektrum DX6i.

Also, where do you plug the servos in the Rx? still the same when mods weren't made?

10-16-2008, 11:04 AM
tx settings are the same, servo channels are the same. as long as you bring the swash back to where it was you don't change anything on the radio.

10-16-2008, 11:12 AM
Depends which side you put the PITCH servo. May have to reverse the sense.


10-24-2008, 01:49 PM

here is my kid flying: :)
Fly with direct to swash mod, Main and tail copterX CNC rotors and fiber blades :)

stock motor and GY400 colco (going to Logictech 2100 :))

Guilherme V.

11-28-2008, 05:34 PM
Where do you get the links from the servo's to the swash? Looking to do this mod using the e325 mounts but would like to know what size rods to get. Would some of the stock rod links work for this mod?

11-29-2008, 02:37 AM
Recuperation from the mod itself , the size of the rods depends on the setup of the swashplate/servo's

12-12-2008, 12:47 AM
Hi guys I've been reading for a bit now. I have the BeltCP and haven't had it for a long time. Only about a month now. I feel this is the best forum for learning compared to the other forums. You guys rock! I've learned a lot and still learning. Finless is a wealth of knowledge that I hope that I can benefit from, along with the rest of you guys.
Helihathnofury. How did you get the Titan mounts to stay on? One screw and ca? I just got the mounts in today and from what I see they only have one screw hole and it looks like that I'd have to drill another hole to get them to mount right. Waiting on a copterx head CX450-01-20 and I also know that I'll have to change the swash to work with the way the heli is setup. BTW I only got the copterx head for 39.99US shipped. Don't know if that's a good deal but it seemed like it at the time. Hope to become a more active member of this forum as time goes by. Thanks


12-12-2008, 01:58 AM
Helihathnofury. How did you get the Titan mounts to stay on? One screw and ca? I just got the mounts in today and from what I see they only have one screw hole and it looks like that I'd have to drill another hole to get them to mount right

Yes, that's correct. I drilled another hole in the bracket. See image.