Swash plate question

[Rudy]

I crashed my 500, It was inverted and I drove it in to the ground pretty good.

To give you an ideal here is the photo of the aluminum frame tray.



While rebuilding I found the inter ring of my swash plate have been pushed down through the outter ring a small bit. The ball links on the inter ring was hitting the outter ring. I used a pair of pliers and was able to push the inter ring back up. Every thing looks feels good now but I'm worried it may give while in flight.

Comment?

[rob78]

Fix it by drilling two holes, adding two screws and washers. Like so:

Sab Goblin 500 defective swash plate ,and how to fix it (5 min 56 sec)

Then buy this swashplate for regular use: http://www.rc-tek.com/store/i2500g-1...aft-p2313.html

Save the modified SAB swash as a backup...you won't need it, but may as well keep it.

[seefest]

Originally Posted by rob78

Fix it by drilling two holes, adding two screws and washers. Like so: https://www.youtube.com/watch?v=2vGD3zeTmL8

Then buy this swashplate for regular use: http://www.rc-tek.com/store/i2500g-1...aft-p2313.html

Save the modified SAB swash as a backup...you won't need it, but may as well keep it.

I hope he fixed the geometry issue that those swashes had on the first run. The first run completely changed the G500 servo to swash geometry.
If he hasn't, I would stay away from those swashes no matter how well they're built.

[rob78]

Originally Posted by seefest

I hope he fixed the geometry issue that those swashes had on the first run. The first run completely changed the G500 servo to swash geometry.
If he hasn't, I would stay away from those swashes no matter how well they're built.

Geometry is fixed and identical to stock.

Quality is significantly better than the stock swash or any replacements available.

[Rudy]

Swash Place

Crap . . . . . . .

Fixed . . . . . .

[sethml]

Originally Posted by rob78

Geometry is fixed and identical to stock.

Quality is significantly better than the stock swash or any replacements available.

Plus, he mailed fixed swashes to everybody who bought the original swash (well, to me anyway) along with a prepaid envelope to mail back the original. Spectacular customer service.

[rob78]

Originally Posted by sethml

Plus, he mailed fixed swashes to everybody who bought the original swash (well, to me anyway) along with a prepaid envelope to mail back the original. Spectacular customer service.

I didn't know he'd done that. Kudos to Bob. His parts are the last you'll ever need to buy.

[seefest]

Originally Posted by sethml

Plus, he mailed fixed swashes to everybody who bought the original swash (well, to me anyway) along with a prepaid envelope to mail back the original. Spectacular customer service.

Its the right thing to do. Trying to sell the original with the wrong geometry was bad business to begin with. Not sure what he was thinking.

[rob78]

Originally Posted by seefest

Its the right thing to do. Trying to sell the original with the wrong geometry was bad business to begin with. Not sure what he was thinking.

I still use the original swash he built. It resulted in no change to my pitch values and it resulted in no change to my cyclic pitch.

"Bad business" is continuing to sell a known defective product, like swashplates that fall apart (SAB) or main gears that fail in flight (SAB). Or a company that makes false claims about the material their product is made from (aftermarket company that gets rave reviews in this forum and called out on it by KDE).

The measurements Bob was given were incorrect. Once he discovered his error, the problem was immediately addressed. And apparently he mailed replacements to previous buyers. He mailed me one even though I told him the original was fine.

[seefest]

Originally Posted by rob78

I still use the original swash he built. It resulted in no change to my pitch values and it resulted in no change to my cyclic pitch.

"Bad business" is continuing to sell a known defective product, like swashplates that fall apart (SAB) or main gears that fail in flight (SAB). Or a company that makes false claims about the material their product is made from (aftermarket company that gets rave reviews in this forum and called out on it by KDE).

The measurements Bob was given were incorrect. Once he discovered his error, the problem was immediately addressed. And apparently he mailed replacements to previous buyers. He mailed me one even though I told him the original was fine.

So every heli manufacturer on the planet goes to great lengths to get "perfect geometry" and your swash with incorrect geometry resulted in no flight difference? You're either not a good enough pilot to tell the difference or you don't care.
Bob produced this swash from measurements he was given? Really? That's hard to believe he would tool up and produce a Goblin 500 specific swash from given measurements and not measurements he took himself from the actual swash. It looks like his swash was built to another helis specs and just happened to fit the G500 main shaft. He didn't mount his new swash on the G500 and notice the geometry was grossly off?

Anyone have a picture of his "new" swash mounted showing geometry?

[rob78]

Originally Posted by seefest

So every heli manufacturer on the planet goes to great lengths to get "perfect geometry" and your swash with incorrect geometry resulted in no flight difference? You're either not a good enough pilot to tell the difference or you don't care.
Bob produced this swash from measurements he was given? Really? That's hard to believe he would tool up and produce a Goblin 500 specific swash from given measurements and not measurements he took himself from the actual swash. It looks like his swash was built to another helis specs and just happened to fit the G500 main shaft. He didn't mount his new swash on the G500 and notice the geometry was grossly off?

Anyone have a picture of his "new" swash mounted showing geometry?

I checked pitch and cyclic pitch values before and after the swash swap. There was no issue with binding. The servo to swash links were no longer parallel to the main shaft. The difference was in the distance from pivot ball to link on the lower ring.

And no, I'm not a smack 3D pilot. Maybe you're correct, I wouldn't miss a tenth degree loss of pitch range.

The measurements came from a member during a rather long thread about the need for an aftermarket swash. A member here provided incorrect measurements on the stock swash. It was obviously a mistake on Bob's part to assume the measurements were correct.

When the error was discovered, Bob contacted me and I sent him my old SAB swash. He produced a new swash with stock geometry.

I'm not saying a mistake wasn't made. I'm saying it was corrected and it's still the best swashplate available for the Goblin and other models.

I never got around to taking pics of the new one although I should have. I still use the old one.

[seefest]

Originally Posted by rob78

I checked pitch and cyclic pitch values before and after the swash swap. There was no issue with binding. The servo to swash links were no longer parallel to the main shaft. The difference was in the distance from pivot ball to link on the lower ring.

And no, I'm not a smack 3D pilot. Maybe you're correct, I wouldn't miss a tenth degree loss of pitch range.

The measurements came from a member during a rather long thread about the need for an aftermarket swash. A member here provided incorrect measurements on the stock swash. It was obviously a mistake on Bob's part to assume the measurements were correct.

When the error was discovered, Bob contacted me and I sent him my old SAB swash. He produced a new swash with stock geometry.

I'm not saying a mistake wasn't made. I'm saying it was corrected and it's still the best swashplate available for the Goblin and other models.

I never got around to taking pics of the new one although I should have. I still use the old one.

The pitch or cyclic loss isn't the issue. The wider swash base would produce slightly less agility and slower response. I'm sure the helicopter still flies well for most fliers.

Correct geometry(links as close to parallel to mainshaft at mid stick) ensures symmetric travel for both positive and negative pitch ranges.

And I 100% agree with you regarding SAB.