Syma Forum

Supernova said:

mailto:asrtaylor@shaw.ca

 

Thanks everyone.

 

Thank you Supernova. I saw the title about a bent shaft so didn't watch the video as my shaft is not bent, but the video shows me exactly that I have this problem.

Thanks, time to order a few extra of these parts and find a screwdriver small enough.

Thanks again, most appreciated. 

In the mean time, outside to fly my S023G at -20C!

CPD said:

I'm assuming you've never watched the Star Trex movies... (and no, I don't mean the prequle they just did)

Oh, I've seen the Star Trek movies, including Star Trek IV. My reference came from that movie as well.

Lol I was watching Star Trek when they were new episodes, just coming out! Lol Crap I'm old!

CPD said:

(then there's "transparent aluminum" which can hold back a tank large enough for a blue whale with only an inch of material...)

But that's only used on nuclear wessels.

Here's the descrepincy--- there's more than one type of lexan. Some can be hard to break like that is, but a lot is very easilly broken, and they're calling a lot of stuff, like plasticware, lexan, when it is NOT lexan.

There's high-quality lexan that can bounce bullets, and there's the quality lexan Syma'd use that is little more than clear plastic.

(then there's "transparent aluminum" which can hold back a tank large enough for a blue whale with only an inch of material...)

They might have fixed this though, since the gears of the 107c look like metal, not plastic.

But, Supernova's right, though. Gears are easier to fix than motors and if you had unbreakable gears, you'd break the top part of the main shafts easier, and if those were unbrakable, you'd bend the main shaft or break a balance bar, and if those were unbreakable, you'd fry motors. And if you made everything unbreakable, it'd be too heavy, so you'd need larger blades, meaning stronger motors, stronger gears, stronger tops of the shafts, stronger shafts, then larger blades...

They have just the right balance of lightweight, yet bend-before-it-breaks and still being tough.

That said, they could use toothpick chunks as shearpins...

Great idea!! I will have a word with SF next time we chat, and could be a move you never know, but the only thing is the extra strength will be transferred to the next weakest part somewhere else. 

And I'm no Rocket Surgeon, Lol BUT the ONE THING I do know is... No Real Lexan is going to break from falling off of a table!!! Lol even if that table is 30,000 feet in the air!!! Lol unless they have significantly changed the formula for Lexan recently!!!

Supernova said:

Buck do you mean polycarbonate that is awesome stuff, lexan is used in the model car bodys.

Hi Nova! I was talking about Lexan!  My experience with Lexan has been that it some very tough stuff!

The windows in the huey I repainted (the one I have the tail of for my avitar) had all lexan bullet-resistant windows. The back side ones, away from the walking/joging path, were all busted out by vandals thinking that there was something valuable inside. The nose "bubble" window on the front left side was hacked through with an axe.

The windows are all 3/16 lexan, replaced sometime in the 90's probably, and in the shade, so not THAT much UV damage. It does not give at all, and while it may be strong enough for helis, it isn't indestructable.

Why they use it for racecar windshields is its much lighter and stronger than glass, but primarilly it does not shatter, it cracks 100% through in two directions, or not at all.

The little sign things that hold paper signs that are clear plastic are almost all lexan.

That said, laminated lexan is insanely strong, and does give because it is much thinner peices with resin that gives. That can withstand a heck of a lot more.

Then, there's the one remaining issue... lexan is VERY expensive. 1 square foot is about $30 depending on thickness. (had to price it out to repair the bubble window) It is also insanely hard to work with without exact and expensive equipment. It is just 20x cheaper and more efficient to use metal, and it is 2x as cost effective to use good plastic that can be molded into the right shape.

I've never seen Lexan break before!  I'm NOT talking about plexi-glass, but Lexan brand by G.E.! it's pretty much bullet proof! as I understand it, a 1/4" of Lexan will stop a .22 bullet! but either way, in my expeience with Lexan, in stock car racing widnshield applications, it has NEVER proven to be brittle in any way!