Hello Dennis, just to let you know I have just purchased serial no. 11. It has 330 hrs TT, has a new 582 fitted & is now & has always been a great little helo & never had a moment of trouble. I look forward to keeping it alive & well into the future.
Best I could ever determine "almost" got me to the bullseye of learning what was in your bottles, so I gave up and used the Robinson stuff.Greetings from Abu Dhabi Rotorcraft Enthusiast!
I hope all here has been well. I have been too busy to participate in the forum this past year with my project here. Wow, already one you have passed, but with great results.
I do have a question for anyone that can remember;
What was the brand and grade of the oil we were using in the Mini-500 transmissions? I'm in an oil-rich country, and damned if I'm having trouble with the oils all foaming up in my gearboxes!
Bryan, you are all-remembering on the Mini-500 stuff.
Any help would be appreciated. Hope all here have a great New year!
Sincerely,
Dennis
Best I could ever determine "almost" got me to the bullseye of learning what was in your bottles, so I gave up and used the Robinson stuff.
Swepco 201 is also what is used in the CH7 choppers.Here’s the Robbie stuff. Swepco 201
Here’s the Robbie stuff. Swepco 201
Thanks, but at $260 a US Gallon, is it really worth it excluding the synthetic alternatives? I appreciate everyone's input, my hesitance is that I'm going to run in a rebuilt transmission. This means putting in very expensive oil, and dumping it after a couple of hours of running in. Does it not make economic sense to use a cheaper synthetic to run it in, seat the gears well, then drain, flush and put in the dear stuff?Hi Francois
Racegear WA have the Swepco ex stock Perth. It is not cheap. This stuff is used by high end race types.
Have you tried your local Robbie dealer or mechanic?
Penrite do not provide enough tech detail to make a valid comparison. However, since the Penrite is a full synthetic and the Swepco a full mineral, I doubt there is any "equivalence".
How much is the gearbox worth?
Cheers
Miles
Thanks Bryan, comments appreciated. The possibility of hygroscopic properties of a full synthetic oil is not something I had considered before.Francois, I would feel AOK "running-in" your gearbox with any "extreme pressure" 90W gearbox oil. I'd even feel good hovering around with that oil. Once your butt is in it at 500' flying around, I would have drained it and replaced it with the pricey stuff. Keep in mind, and weigh-n-decide for yourself that 100% synthetic is somewhat hygroscopic and unless you operate the transmission AT FULL OPERATING TEMPERATURE, FREQUENTLY, moisture infiltration may cause rust-bloom to form on bearing races and balls and on the contact faces of the gear teeth. If the gearbox will be sitting unused for an extended length of time, pure mineral oil needs to be all over the insides as a moisture barrier.
I see your screws arrived.Thanks Bryan, comments appreciated. The possibility of hygroscopic properties of a full synthetic oil is not something I had considered before.
Cheers, F.
Do you still have pep exhaust? If so can you please send me a pic?If anyone needs a PEP exhaust, I have one I don't need. It needs media-blasted and painted...or JettHott coated.
$100 plus shipping, needs no packaging, just UPS label.
Yes I do. It's in good shape but it was painted bar-b-que grille black when new, and has never been repainted so it's surface rusty, external only. It has been "contoured" a little bit in the areas where they got real close and started vibrating against the Mini-500 frame.Do you still have pep exhaust? If so can you please send me a pic?