The official 600 stretch mod thread

[nightflyr]

Are you looking at DTS or bellcrank..?

I run ALIGN 610's on one 900 stretch bellcrank setup, and TORQ HV on the 1000 DTS just for safety reasons.

If simple sport flying is all you plan to do..
and depending on the cyclic setup....
Either of these mentioned, or Hitec 79 series

[Luvmyhelis]

Thanks Night! I just made up my mind. I have noticed in all my earlier but smaller fbl builds that the faster and more powerful the cyclic servos are the smoother and quicker the fbl controller seems. In essence the helis are far more locked in. I found some new magnetic induction style titanium geared servos that come in at 16kg torque and .13 speed at 7.4v. I can live with that. I wasn't impressed at all with the align servos. To me they are barely adequate. Thanks for the response and heli help. It got me thinking. And after that we make our choices based on what we think may work best. Those Outrage servos would be outstanding but my budget says otherwise! Haha.

[nightflyr]

Equipment does start to get pricey when you decide to go larger

[Luvmyhelis]

Even on the smaller stuff the elcheapo junk will bite you every time. Been there done that. But never again. I have box loads of krap servos and gyros I tried in the past. Plus bearings, gears shafts ect ect ect. You do get what you pay for. Now I just buy decent stuff off the get go. Both my 450s are outfitted with mksDs95s all around. But I had those before anyone had ever heard of them. Literally thousands of abusive flights and not a single problem with them. But I had others that were still pricey blow gears or burn on the first flight.

I will forever drool over those BLS 9180s. Maybe if I win the lotto some day. Even those though have had a few problems. I saw the one that failed on your project earlier. So there are no for sure's in this hobby.

Now to carve out another set of custom carbonfibre side plates for my other ongoing project while I wait for the mailman to make my day on these servos. All I need now is for my HH raised tail and some batteries, my 600 will finally be airborne!

[Bodge]

Can i use trex 700 parts on my 600e stretch.

Im starting to stretch from 600 to eather 710 or 800.

Probably 800 as the price difference is only the extra for the longer blades from what i can gather.

the frame is a HK 600e so im uprading alot of the part to trex and im thinking i might as well fit trex 700 FBL and swash plate instead of trex 600 parts.

also looking at a 700M 510 kv motor to convert it to 12s. It might takes some frame modding but id think it was better suited than a 600 size motor considering im going to 800 size.

any input would be great

Edit. 700 main shaft is 12mm and 600 is 10mm so id guess there would be a lot of work with changing main shaft bearing and blocks, and then auto rotation gear / one way bearing.


Does anyone make 800mm blades for 12mm grips?

[Bodge]

Originally Posted by Bodge

Can i use trex 700 parts on my 600e stretch.

Im starting to stretch from 600 to eather 710 or 800.

Probably 800 as the price difference is only the extra for the longer blades from what i can gather.

the frame is a HK 600e so im uprading alot of the part to trex and im thinking i might as well fit trex 700 FBL and swash plate instead of trex 600 parts.

also looking at a 700M 510 kv motor to convert it to 12s. It might takes some frame modding but id think it was better suited than a 600 size motor considering im going to 800 size.

any input would be great

Edit. 700 main shaft is 12mm and 600 is 10mm so id guess there would be a lot of work with changing main shaft bearing and blocks, and then auto rotation gear / one way bearing.


Does anyone make 800mm blades for 12mm grips?

sorry for my nooby questions. Ive done more searching and some phone calls and it looks like NHP make some 800mm blades which will fit into my 12mm grips so going upto 700 size head/ grips and swash seems like a waste.

As long as the 600 stuff (head and mainshaft) is upto the job and is strong enough .

please advise me if its a bad idea to run 800 size blades / boom on 600 (12mm grips) head and running gear. Its only for normal flying and no 3D but i want this thing to be safe and reliable

Also i feel that the 4.5mm wide belt might be a little under engineered for such a large bird

[helihaven]

Nightflyr will have to chime in on safely running the 800+mm blades...as i believe he is the only one in the thread to have done it.
as for the belt, I ran a 4 bladed tail, swinging 95mm blades at extreme speeds (14000+ rpm) using just an MXL belt 3mm wide (trex 450/500 size)...100+ flights with no sign of trouble...the 6mm XL surely wont hurt though!

[nightflyr]

I have been running 800, 900 and 1000mm blades, but not with the stock ALIGN 600 head.
I would suggest looking into the RJX 90/10mm head to replace the stock head.

[Bodge]

Originally Posted by nightflyr

I have been running 800, 900 and 1000mm blades, but not with the stock ALIGN 600 head.
I would suggest looking into the RJX 90/10mm head to replace the stock head.

cheers for the advice, Im defiantly taking it on board

To my relief the RJX head seems very well priced and having larger grips opens up the range of 800 size blades i can use

[Bodge]

Originally Posted by helihaven

Nightflyr will have to chime in on safely running the 800+mm blades...as i believe he is the only one in the thread to have done it.
as for the belt, I ran a 4 bladed tail, swinging 95mm blades at extreme speeds (14000+ rpm) using just an MXL belt 3mm wide (trex 450/500 size)...100+ flights with no sign of trouble...the 6mm XL surely wont hurt though!

really appreciate the help.

I think ill get it going with the 4.5 but work on upgrading it to the 6mm in the future

[Luvmyhelis]

The 4.5mm width belt will work but you will have very little safety margin. Also check the want adds here at HF as I picked up a TracX fbl DFC head that also has the grip width that will enable you to run 800+ sized blades. Mine is setup for 815mm Edge's. I should have mine fired up this next week! Kinda excited.

[StripedGear]

Wow... awsome thread. Some of you guys should be rich by now with all the great mods. Here's my modest mod. T600 to 710.. I have a stock 600 cf. I did the 40mm 700 tube cut down for tt fit. 700 fins, 700 tube supports. I have an Ice 100 and a stock BL600L 1690kv motor with 11t pinion. G5 710 wide chord mains. 5000mah 6s packs. 600 flybar with weights. Nice and easy, simple mod. The thing was so awsome it scared the bejusus oout of me. I only hovered around but when I set it down my knees were shaking. I thought the main shaft was going to twist off. Does anyone think this thing is safe.

[nightflyr]

Might I suggest you convert to 12S..
Your present setup is going to stress your battery passed it limits not to mention the load your putting on your ESC.

A 600 can be stretched quite a bit, but I don't recommend running it on 6S.

[Bodge]

Originally Posted by StripedGear

Wow... awsome thread. Some of you guys should be rich by now with all the great mods. Here's my modest mod. T600 to 710.. I have a stock 600 cf. I did the 40mm 700 tube cut down for tt fit. 700 fins, 700 tube supports. I have an Ice 100 and a stock BL600L 1690kv motor with 11t pinion. G5 710 wide chord mains. 5000mah 6s packs. 600 flybar with weights. Nice and easy, simple mod. The thing was so awsome it scared the bejusus oout of me. I only hovered around but when I set it down my knees were shaking. I thought the main shaft was going to twist off. Does anyone think this thing is safe.

In an ideal world it would be best to go with a larger main shaft but imo (which is just a guess with nothink to back it up)

10mm main should be fine with 800mm blades if its just for normal flight. If you see the abuse a 600 3D heli takes with a 10mm shaft id think there was more forces, stresses and strange's but on the main shaft in hard 3d 600 compared to the hover and gental FF flight and hovering my AP AV 800mm rig will be doing

[runesb]

here is my rjx head mounted at the 10mm shaft.
And a 800 tail boom.
it will be a 800 sized with the K600 frame.

[Luvmyhelis]

Yeah, I have to agree with Night here. With the extra stress and torque demands that a serious stretch puts on a system, you really should look very hard at 12s. If nothing else your batteries will love you for it down the road.

And there really isn't a reason at all the 600 cannot support an 800 stretch with the stock CF body (reinforced of coarse) and the standard 10mm thick mainshaft. Personally I wouldn't consider it without doing the 3rd lower bearing support though.
Plus I see no reason the setup won't handle some 3d work.

[StripedGear]

Yaaaa. I've smartin up sense then... I only planed on sport no 3d. I'm back to a stock 600, I like it better. When I go 700 it will be a 700. If it ain't broke don't fix it. I was looking for an easy way to go 700 Jetranger. I think i'll put that project on hold for now. Thank you all for the wise advice.

[SidewaysLS4]

Originally Posted by StripedGear

. I was looking for an easy way to go 700 Jetranger. I think i'll put that project on hold for now. .

JetRanger you say? I'm running a 700 LongRanger on 6S...pretty darn happy with it so far. (stretched 550 here). Here's an Eagletree log of general flight with some 'max power' passes thrown in there. 6S isnt that bad with today's batteries on a scaler


http://www.helifreak.com/showthread.php?t=363883




.

[Luvmyhelis]

Good work Sideways!

Progress report for me finally. I just got in my new MIBL HV servos, so the build is now on! I also fired up my YGE Hv120 clone and it works spectacularly! I repeatedly spun up the 4035-630 under a load and it didn't even get warm. And my new Sk540 just showed up also. So I pulled my beta test Sk720 and am inserting it into its place. Hopefully I can get this off the bench and into the air this next month when I can afford the correct weight of batteries up front to balance the heli. I also want to add a safety net on the esc and get one of my new heat sync's in place.

My 815s are begging to be flown. And my carbonfibre plates just showed up, now I can carve them up for a set of custom skids I want to fab for it. Helihaven tells me he has the new raised tail in the works so I am finally getting excited about this again. .
His adjustable gearing transmission is still in the works, so for the time being I have both the Mod1 and .7 mains to play with so I can get a maiden.

Watching all you guys field your awesome stretches has made me want to get mine going even more.

[GB ian]

A word of warning

My t600 12s stretched to 700 with an Outrage 50 sized head just ripped itself to pieces in mid air.

I was flying mid level 3d

So for hovering it would be fine but the grips could not take the 3D and one of the bolts that hold the bits that have the ball on sheared off.

Blade flipped and cut tail boom right off

It was a total write off...compass 7Hv coming soon