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Old 01-29-2020, 01:10 PM   #21 (permalink)
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Put the 766 boom in it. that is 24mm so Matt makes almost all the parts already. The biggest hurdle would be the TT drive and frame mounting.
Might be as easy as removing some of the width of the transmission/boom mounts and drilling an extra hole in the frames.
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Old 01-29-2020, 01:22 PM   #22 (permalink)
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Quote:
Originally Posted by blkdout View Post
Quote:
The 516 is belt drive not tt.
I own both which is where my comparisons are coming from. I just wish the 696 tail was modeled after the 516 MINUS the belt.

It's all hypothetical, of course, but would be awesome if it could be easily done. I have contact with a shop or two but definitely don't think it would be worth whatever they charge for one-off parts... even just for boom clamps.
Ah ok. Yes me too. And i agree the 516 tailbox is sweet.
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Old 01-29-2020, 05:07 PM   #23 (permalink)
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Quote:
Originally Posted by smittylube View Post
Put the 766 boom in it. that is 24mm so Matt makes almost all the parts already. The biggest hurdle would be the TT drive and frame mounting.
Might be as easy as removing some of the width of the transmission/boom mounts and drilling an extra hole in the frames.
You think 24mm is wide enough to remove the supports?

The 766 uses the same TT bearings, ends and collars as the 696 so that's cool. Only need the bearing housings and o-rings to adapt to the new boom diameter.

Only thing I would want to know is the bolt pattern of the 766 boom clamps and if the 696 gears will fit the 766 tail case.

The rest of the parts list seems pretty straight forward i.e.: control rod clamps, bushings, tail case, etc..
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Old 01-29-2020, 10:12 PM   #24 (permalink)
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for the 696 I would still use the supports. My stretch feels like it almost could use them when I tested my tail blades spooled up w no mains.

700 size has some serious torque and power going on so yeah Iíd still use them, but 24mm boom would rock.

Matt is smart to not reinvent everything for each heli. So Iíll bet it wonít be too hard to do. It would be nice to see them side by side to figure it out.
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Old 01-30-2020, 08:20 AM   #25 (permalink)
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Quote:
Originally Posted by smittylube View Post
Matt is smart to not reinvent everything for each heli. So Iíll bet it wonít be too hard to do. It would be nice to see them side by side to figure it out.

Iíve got them both on my bench right now. What do you want pics and measurements on?
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Old 01-30-2020, 09:12 AM   #26 (permalink)
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I would look at the width of the frame and length/ mounting of the tail boom with tail transmission to see if the 766 boom could be adapted into the 696.
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Old 01-30-2020, 09:45 AM   #27 (permalink)
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Default New Synergy Booty

766



696



Obviously the first 766 pic isnít 100% accurate, canít get at the bolts on the side without unbolting a side panel on that heli. I donít see much reason to adapt it. Matt went to the thin boom on the 696 to save weight and make it CG. Changing to the larger 766 boom would ruin that CG and still need supports.

Just as an aside, if anyone else owns both of these helis, Iíve 3D printed an adapter to narrow the rails in the 766 so they can both use the same battery tray. The STL is up on Thingiverse.
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Old 01-30-2020, 12:09 PM   #28 (permalink)
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Please resize your pics! Trying to read this on an iPhone is impossible with those gigantic pictures.
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Old 01-30-2020, 12:39 PM   #29 (permalink)
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Quote:
Originally Posted by Gladius View Post
Please resize your pics! Trying to read this on an iPhone is impossible with those gigantic pictures.
Sorry. Displays just fine on my iPhone. Feel free to skip my post.
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Old 01-30-2020, 12:59 PM   #30 (permalink)
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Quote:
Originally Posted by Eury View Post
Just as an aside, if anyone else owns both of these helis, I’ve 3D printed an adapter to narrow the rails in the 766 so they can both use the same battery tray. The STL is up on Thingiverse.
I saw that, thanks for making those. Did you print a set yet?

Also pics look fine on my Galaxy
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Old 01-30-2020, 01:18 PM   #31 (permalink)
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I saw that, thanks for making those. Did you print a set yet?

Also pics look fine on my Galaxy
I did, but I haven't put them in the 766 yet. The holes all match up and the thickness is correct, so I don't anticipate any issues.
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Old 01-30-2020, 03:25 PM   #32 (permalink)
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Quote:
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Sorry. Displays just fine on my iPhone. Feel free to skip my post.
Normal on my android on Tapatalk.
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Old 01-30-2020, 03:25 PM   #33 (permalink)
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24mm boom on a 700 needs supports. 25 on a 600 always grid them still.
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Old 01-30-2020, 05:02 PM   #34 (permalink)
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Yeah... defeats the purpose. The idea was to get that unsupported booty. I think the original 27-30mm idea is the correct range.

I'm brewing up another idea now. Complete redesign.

p.s.: Those pics are huge on my computer and phone.
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Old 01-30-2020, 08:58 PM   #35 (permalink)
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Take a look at the compass exo boom. Huge teardrop shape. Was beautiful.
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Old 01-30-2020, 09:18 PM   #36 (permalink)
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What if the current support system didn't have to be in the form of a push-up bra? Struts have been around for ages. I know girls just rip them out because they're uncomfortable.

I propose the current cylindrical boom design could be supported in another way... perhaps easily adaptable and unnoticeable.

Currently working with caveman drawings.
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Old 01-31-2020, 11:23 AM   #37 (permalink)
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I love your comparison! Lol. Good luck on your idea... My wheels are turning too.
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Old 02-01-2020, 11:33 PM   #38 (permalink)
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Quote:
Originally Posted by jayf636 View Post
I love your comparison! Lol. Good luck on your idea... My wheels are turning too.
I'm under pressure to keep posts within the original theme I guess, haha.

Currently questioning how economical the final design will be. I just found a perfectly sized sheet of bass wood so maybe a non-functioning prototype will be made soon enough.

...to be continued.
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Old 02-06-2020, 06:42 PM   #39 (permalink)
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Finally got around to the concept. Not quite a prototype as it needs modded to fit around the servo and possibly have to extend beyond the rear frame.

This would be made of 2mm, maybe 3mm carbon if needed. Might need to add another strut support clamp to the boom to have 2 points of contact on the boom. Also might need spacers in-between the supports to gain full width crossmember support.

I know a few reasons this is not a great idea, like weight and cost BUT from a structural standpoint, anyone have input? Would this be capable of supporting the boom at least equally to the current system?
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Old 02-07-2020, 05:02 PM   #40 (permalink)
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Quote:
Originally Posted by blkdout View Post
Finally got around to the concept. Not quite a prototype as it needs modded to fit around the servo and possibly have to extend beyond the rear frame.

This would be made of 2mm, maybe 3mm carbon if needed. Might need to add another strut support clamp to the boom to have 2 points of contact on the boom. Also might need spacers in-between the supports to gain full width crossmember support.

I know a few reasons this is not a great idea, like weight and cost BUT from a structural standpoint, anyone have input? Would this be capable of supporting the boom at least equally to the current system?
I'm no expert and have no mechanical engineer degree but my gut feeling is saying you should probably not under estimate the bracing strength of triangles, it is not a conincidence that tail boom clams are less wide then the frame connection ( even small angles help ) . tail braces just make triangles to get their job done.

while your design is probably fine (with extra boom connections ) in up down , it doesn't do much for sideways ( you basically have a square between tail and brace. and a sqaure doesn't stop sideway movements )

if you would put the brace under an angle it would support in both axis. but why bother if 2 sticks can do the same and the connection to the frame is peanuts to attach. Oooh damn the desire to go strut less

Last edited by zomaar; 02-07-2020 at 05:13 PM..
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