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HelicopterHIROBOOther › SHuttle ZX Conversion To FBL 120DEG Swash HV DIGITAL
01-05-2014 01:16 AM  4 years agoPost 21
dcasole

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Dacula GA

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Ball on servo side, grip with a band on motor side

Make sure ur end points are set right and there will be little if any stress on the links
Never had the need for a return spring nor have any of the guys I fly with ....I think u might be overthinking this one .....

Dave

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01-05-2014 01:42 AM  4 years agoPost 22
icanfly

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ontario

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the original is a very light weight, as in not too strong, band style connector on the throttle arm and was a wire z bend on the servo. I'll have to run out and get, or make, a band connector. All ready with the ball link on the servo.

One of the first things encountered after mounting the servos was setting the extents on the throttle. No tugging and 0 throw at idle.
header tank
Am I missing something?

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01-06-2014 03:17 AM  4 years agoPost 23
icanfly

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ontario

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been really catching up on all the loose ends with this Shuttle rebuild as I'm throwing in modifications left right and center. Speaking of

Take a look at the swash which I realized could not be trusted with the original plastic cast balls and were not to my liking with only 2mm worth of material surrounding the perimeter of 2mm metal balls. I made these aluminum re-enforcing plates and epoxied them on, then added a screw toward the base to really fix things solid,

stage one complete and glued on, twisties were to hold the alu until the epoxy set (ooh I couldn't wait), and,

all done, everything here finished, screwed tight and hard.

wow, wt? is this? Swiss cheeze?

Nope, it's my tank base plate. I've also moved the skid legs above the original plane of the old mounting hole to get a nice slight rake in the heli,

you can tell I like certain things, a real work of craftiness and modern avionics techno Swiss,

the night before last, I made up those cf boom support rod ends, couldn't be bothered waiting for the right moment to make a visit to the out of town heli specialist hs or order some online. My old stash of aluminum rod came in handy for them, couple hours by hand and drill press later.

hehe, about 98 percent done. I'm considering different follower arms with balls set equal distance to the main axis for better actuation and more pitch on the head. Am also probably going to nix the rate gyro idea and go with a modern 3x gyro, why take the risk of unknown results when tried tested and true is a heart beat away, I mean scavenged from some less appreciated littler rotor thing (Blade 300x, should I?).

Throttle arm, fuel filter, igniter, sat and gyro placement, whew this was for real a two week steady "WHAT I DID WITH MY HOLIDAYS" experience. Can't wait to fly in the snow, and fly up a gopro for winter ap too, very cool indeed, very------cool.

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01-18-2014 12:14 PM  4 years agoPost 24
icanfly

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ontario

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a little reconfiguration on the head and it looks much simpler, works pitch better, plastic hub has to be refit with an aluminum one to give it solidity,

now I have a real problem, because I trained in the swash school of 120 degree rc heli 3 servo (1 in the tx) I admit, I'm not sure what to do to set the swash servos up to get ccpm. I tried in the tx, 3 servos 90 degree swash and all it does is improperly mix everything up.

Originally I have the swash set up as 1 servo in the tx, is this correct for the heli? It operates fine as 1 servo on the bench. ATM the heli is, 1 servo does the collective, 1 elevator, and 1 aileron.

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01-18-2014 02:27 PM  4 years agoPost 25
fastrc1

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Planet Brooklyn, NY-USA

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Hmmmmm the concern is that the servo alignment in that tray doesn't lend itself to 120° ccpm. You have a push pull aileron servo that's single servo mode, an elev and collective control that's also single servo mode. Wayyyyy back when I've seen a few mods that remove the elev ail n collective servo and had a fabricated mount that attached to the sideframes and put the servos in position to make it 120° ccpm. I believe Century Helicopters used to have a mount like that to convert there raven and hawk helicopters to do just that. If I remember correctly they were very similar.

Eaton

RIP Roman Pirozek Jr.
Team Futaba USA
Team Kontronik USA
Member of Planet Brooklyn NY

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01-18-2014 04:07 PM  4 years agoPost 26
dcasole

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Dacula GA

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Eaton
I converted a non ccpm Sceadu and was a little worried about only having a single servo driving each but in the end it worked out fine

I did use good servos ...
Dave

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01-18-2014 05:27 PM  4 years agoPost 27
fastrc1

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Planet Brooklyn, NY-USA

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Okay Dave. I'll never doubt it working. I was pretty much just considering the physical layout of the machine.

RIP Roman Pirozek Jr.
Team Futaba USA
Team Kontronik USA
Member of Planet Brooklyn NY

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01-19-2014 01:48 AM  4 years agoPost 28
payne1967

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uk

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the std shuttle is single servo
but there was a shuttle plus that could be purchased as a 120 deg eccpm version
and i beleave a conversion set to go from single servo to 3 servo eccpm (sorry i don't know the part numbers)was available

i would leave the heli as single servo and use a good servo on the pitch

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01-19-2014 03:57 AM  4 years agoPost 29
icanfly

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ontario

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thanks so far, the SDX layout is one that is 120deg stock and the zxx is it's predecessor.

A pic of a modded sxx that had an extra servo tray off the front mounting platform looks doable.

So the end of the day an eccpm swash is 120 with pitch, left roll and right roll each controlled by a single separate servo, collective is operated by all servos together. The mod includes slightly longer arms on the roll bell cranks and removing the collective pitch lever while fixing the collective pitch crank axle, all not hard to do now.

Not hard considering I won a trex 500 fb 8mm head and swash assembly to help with the process.

Amazing, you get to see evolution as it happened with an old bird sx to zx to zxx to sdx and so on, how parts were removed to lighten and simplify the heli.

Here it is pre zxx top starter and 120deg swash ccpm upgrades. A few last minor items and she'll be ready to fire away. Not going to drop a lot of bucks, just going to have fun with it and get it updated while projecting bigger and better things to come from other helis. Experience has taught me well.

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01-19-2014 06:35 PM  4 years agoPost 30
payne1967

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uk

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with the trex 500 fbl head you will find it very hard to locate any blades with the correct length to fit the grips as the root of the grip is too narrow for the 550 blades

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01-29-2014 04:05 AM  4 years agoPost 31
icanfly

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ontario

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good point, i'll have to see what the 500 assembly looks like before it goes on.

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01-29-2014 11:18 PM  4 years agoPost 32
payne1967

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uk

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the trex 500 head bolts straight on
it's just the blades that are the problem

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02-16-2014 04:57 PM  4 years agoPost 33
icanfly

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ontario

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I decidered to drill the head center hub out and lower the rotors, thus requiring a more standard fbl approach with links directly to and from the swash and grips. It wasn't difficult as one standard drill size is almost 8mm exactly and a little reaming with a barrel sander to clean beyond the original hole is all it took to get the hub to slide down.

Alu swash, still have to fab a follower hub, 3x gyro, upgrade rx, servos, cranks, grips, to suit the fbl conversion.

The TT blades sure look sharp in terms of quality, but I wonder if the tail blades might need to be replaced with a larger set,

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04-13-2014 04:05 PM  4 years agoPost 34
icanfly

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ontario

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Success at last, ran the os 32 with great results, here's the oil patch left behind from it's first run, idle to wot not a problem at 1.5 turns of the needle,

All the fiddling and high hopes paid off, now to finish the gyro and servo set up and throw some blades on it for a test hover, (maybe a month from now, no rush). See the nail? that was there before I noticed in this video still, I video'd the run up for the first time in 20 odd years it has sat.

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06-07-2014 01:07 PM  3 years agoPost 35
icanfly

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ontario

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updated the servos and swapped in a 3gx recently. Getting ready for final bolt down and gyro tuning, then it's off to the races in a manner of speaking.

I believe the entry spigot on the header tank should be topside and a brace across the front of the servos will help rigidise it while providing a place to mount the battery. Still got to mount the servos (with a little rubber padding on the two smaller servos because the mounting holes are shorter than the mounting plate)

All hv servos collective at a whooping 16kg and tail and throttle at 6kg on 7.4v. Oem shuttle of vintage was only 3.5kg on 5.4v.

I still have to fab a guide for the swash anti rotation, the triangle servo horn on the pitch servo will hold up but not beyond scale flight type use. Conversion to 120ccpm was successful with all three swash servos operating in unison right out of the box.

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07-19-2014 12:55 PM  3 years agoPost 36
icanfly

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ontario

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and the final ready to start fuel in the tank machine,

Only battery for glow plug is a dud, fuel might be aged, didn't start, it's ready though, baby steps.

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07-21-2014 12:02 PM  3 years agoPost 37
icanfly

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ontario

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Brought you along for the ride on this Shuttle 120deg swash fbl conversion frankenheli to see what can be done with an oldie but goodie, here's the first official hover test.

Don't let the su-uu-uun go down on me-eeeee, harha, joke was on me not gluing the c-rod for the tail. A foot off the ground, a couple of tail wags 2 seconds up the c-rod disconnected letting the tail revolve and down it came on th.

Was very stable, I'm impressed. A repair session last night and I fixed the rod while sorting out getting that little extra tail pitch by drilling a hole on the bell crank closer to the tail housing, almost 90 degrees total now.

Discovered nitro can melt rattle can paint.

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07-22-2014 01:23 PM  3 years agoPost 38
icanfly

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ontario

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success at last, a little tracking and tail waggle issues to work out,

A throttle adjustment so as not to over rev at 100% after a second bckyrd hover yesterday eve was better than the morns test. She's holding up everywhere else. A little starting trouble is inconvenient, a new glow plug helped make it better. Wondering if a bottle of fresh nitro might change that.

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07-22-2014 11:37 PM  3 years agoPost 39
icanfly

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ontario

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ohh poo, after a beautiful beginning I dicidered to put the canopy on. I reset the tail for more delay, here it's going well,

then for no apparent reason it goes sideways and eats a little dirt, links popped off and I think an old link on the ail servo may have been the initial culprit when I popped a bit of collective before this happened, the same time actually. The link end was broken,

boom, link, ego, tail fin (wasn't very strong to begin with), everything else seems ok, from 3ft up.

Fortunately my th finger is ready at all times, keep it covered.

Almost forgot to mention, the tail servo being a smaller 6kg one was hot to the touch while all others were normal with no heat. Got to get a bigger one then.

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07-25-2014 05:47 PM  3 years agoPost 40
icanfly

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ontario

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Yesterday about the same time as today, noon, ain't she sweet?

I thought I could get this all worked out within 6 hover tests, not to be unfortunately. I was liking the smell of nitro but something about the tail is giving this thing a headache, me a headache. Take it up a foot off the take off plywood sheet and the tail goes full left . The torque sends the heli nose up and I have to let her down a quick as can be, th to the rescue but not before breaking a NEW fin, and damaging a brand new main blade set put on only an hour before this occurs. Did the tail reset it's center point? Yesterday during a 3min hover the tail servo got extremely hot but was fine after cooling down, it's the bl hv align from a 700? gawd dang nabbit silly rabit, 2 seconds airborne and this is the result, it landed on the tail and flipped over once before resting like this,

Tail pitch has always been zero and the heli gave full right stick response without command. Is it the servo now? The gyro gain?

What's amazing is that it should have worked better with the 90mm blades over the 85mm ones I had on it yesterday.

Soak it up, it's the hobby, nothing that hasn't happened on my 450 and or 300 in the past, more time,,,,,,,,,,,, more money,,,,,,,,,,,,,,,,,okee dokee kiddo, har har.

Tail slider is steel on steel, not great and got sticky from time to time. Tail always had a slight wobble from day one. A TT tail pitch slider and clamps will be refitted next, might even go all TT tail in the future if not expensive.

I was starting to appreciate the larger scale helis there for a moment, lol.

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HelicopterHIROBOOther › SHuttle ZX Conversion To FBL 120DEG Swash HV DIGITAL
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