Lynx Heli Innovations 250 Upgrades Request thread

[buzzsaw 46]

Now your thinking! The reason we want to stretch is because of the weight, get rid of the weight.

[myxiplx]

Way ahead of you. I'm working towards a 300g, 4500rpm machine. If I could get lighter Lynx cyclic servos, and a lighter Lynx canopy I suspect 285g might be possible :-)

[BladeScraper]

I'm gonna email Luca about servos. I'll let you know...

what do we want? micro servo, obviously, but how fast, how much torque? How much weight?

[myxiplx]

Hey BladeScraper,

I'd say the LX9001 high voltage servo which Lynx already do is the perfect starting point. If Luca can put together an alternate gear set for that we're laughing.

The LX9001 is probably ok for a tail servo as is (although a little faster gearing would be nice), if they geared it down to nearer the speed of the Align DS410 that would probably create a version that would make for a good cyclic servo.

If you speak with Luca, tell him there's a willing guinea pig for these in the UK. I'm still running stock cyclic servos so if they can gear the LX9001 down I'll happily buy a set from him and test them out. Swapping 3x DS410 servos for those could be a 22g weight saving on its own.

Myx

PS. I've got an online spreadsheet where I was tracking various servo options. I'm not 100% sure of the torque specs as I don't know whether manufacturers are listing stall torque, but it gives you a reasonable feel of the options I'm found in the market:
https://docs.google.com/spreadsheets...it?usp=sharing

[buzzsaw 46]

The lighter and faster the better. I would honestly start with the lx9001 on cyclic and see if they have the torque needed. Weight wise I think most would like to stay under 6.5g, 5.25g is fantastic, but I would give up some weight for MG.

How much torque do the stock servos on the 130X have? The 250 is closer in size to the 130 than a 450 so that should give us an idea what is needed.

[myxiplx]

Did anybody suggest a carbon pushrod? One for both the normal tail and one for any stretch kit they make?

[Harbormaster]

Originally Posted by myxiplx

Did anybody suggest a carbon pushrod? One for both the normal tail and one for any stretch kit they make?

That would be nice. Not a very high-profit item, though. Still, some kind of extended pushrod would be a nice complement to (and necessary component of, come to think of it) a stretch kit...

[myxiplx]

I have a feeling that with everything listed here Lynx could release a set of upgrades which could get us to a 280g Trex 250. Or to a sub 300g stretched Trex 250.

Oh I hope they get time to work on this soon!

[ongbenghui]

Originally Posted by myxiplx

PS. I've got an online spreadsheet where I was tracking various servo options. I'm not 100% sure of the torque specs as I don't know whether manufacturers are listing stall torque, but it gives you a reasonable feel of the options I'm found in the market:
https://docs.google.com/spreadsheets...it?usp=sharing

That's good work!

Mind if I update into that spreadsheet ?

[myxiplx]

Sure, PM me your email address and I'll grant you permissions.

[buzzsaw 46]

Originally Posted by myxiplx

I have a feeling that with everything listed here Lynx could release a set of upgrades which could get us to a 280g Trex 250. Or to a sub 300g stretched Trex 250.

Oh I hope they get time to work on this soon!

How big a stretch are we all thinking? 10-15mm or more? Seems like any more than 10-15mm and you might as well move up to the 300x/cfx.

Your weights are in line with what I was thinking. It would be awesome to get them that light without much effort.

[cobieg]

I stretched mine 50 mm on the boom, 35 on the mains. It weighs 350 g.
I dont fly 3D, only sport with a few loops,rolls, and some inverted flight but, it flies great.

[buzzsaw 46]

Originally Posted by cobieg

I stretched mine 50 mm on the boom, 35 on the mains. It weighs 350 g.
I dont fly 3D, only sport with a few loops,rolls, and some inverted flight but, it flies great.

After much thought you're right. I didn't realize how heavy the 300CFX was, Spec'ed flying weight 510g. I fly 255mm Hornet II blades on my FBL Hornet and it only weighs 340g with an 80g pack. It's a blast to sport fly smooth aerobatics with it turning only 2200rpm, but it's becoming increasingly hard to find parts for it so a modern alternative would be really nice!

[jmtyndall]

Vtown nick just sent me an auw of over 600gr I think

[Harbormaster]

I'm just thinking... now that Lynx has their own 250, maybe aftermarket stuff for a competing product is not as much of a priority?

[BladeScraper]

The Lynx is a 250mm the T250 is 205mm blades, not even the same class They will definitely continue making upgrades for the Align 250.

[Harbormaster]

Originally Posted by BladeScraper

The Lynx is a 250mm the T250 is 205mm blades, not even the same class They will definitely continue making upgrades for the Align 250.

I wouldn't go so far as to say that they're not in the same class--what I would call "small RC heli"--bigger than a micro, smaller than a 450.

And I didn't say stop making upgrades, but maybe just wouldn't prioritize developing the new ones we've been talking about so much since it encourages folks to buy the competition.

Just thinking out loud here (and/or talking a lot of ignorant BS--my specialty ).

[Slobberdog]

Originally Posted by Harbormaster

I wouldn't go so far as to say that they're not in the same class--what I would call "small RC heli"--bigger than a micro, smaller than a 450.

And I didn't say stop making upgrades, but maybe just wouldn't prioritize developing the new ones we've been talking about so much since it encourages folks to buy the competition.

Just thinking out loud here (and/or talking a lot of ignorant BS--my specialty ).

A stretch kit would put the 250 into the oxy 3 class, so maybe that would be a no go, if I was in business anyway.

but would still like them to start making some upgrades even if its only 215 blades and a less sloppy tail hub and grip set

[BladeScraper]

first thing released
http://www.lynxheli.com/index.php?cP...a4d0c300dd1b34

[Griff1]

If any of the 280gr 250 upgrades ever get here I think i'll get even more aggressive with the weight saving.

I was flying a friends 180cfx the other day, it wasnt until I landed and removed the canopy to power down that I realized he was running an 860mah battery, tbh the thing was rocking and didn't feel underpowered or heavy.

That lipo must of put his auw at nearly 230 grams! this got me thinking...

why not use the 180cfx motor on 4s lipo to save weight?

The 250 maingear is already 30% larger so you can sort of cancel out the blade size difference, I know the 180cfx motor can run 4s and with the right pinion choice and a governed setup I reckon the combined weight saving of 12-15gr on the motor and 12-15gr on the lipo could turn a 280gram 250 into a true 250gram machine.

Its extreme i'll admit but ive seen a 250 build on here that used a 2s hp08, now that's extreme.