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Post by stoffe64 on Nov 13, 2014 16:38:31 GMT -5
Very nice video Anders,you really explaned how turbine engines work!
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stevep
Veteran Member
Joined: November 2012
Posts: 120
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Post by stevep on Nov 14, 2014 21:22:56 GMT -5
You're a mean lookin' dude--wouldn't want to meet you in a dark alley :-)
--Steve
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Post by smithy1 on Nov 15, 2014 1:24:35 GMT -5
Get a haircut you hooligan....!! Great work...wish I could understand Sweedish... Cheers, Smithy.
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Post by ernie wrenn on Nov 15, 2014 10:02:28 GMT -5
Use Moroso climbing gear lube. It attaches to the gear surface and will not sling off.
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Post by ernie wrenn on Nov 15, 2014 10:02:37 GMT -5
double post
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Post by Johansson on Nov 15, 2014 10:42:37 GMT -5
nice video, not that i understood a word :-) Mostly I just rambled around a bit about the difference between a turboshaft engine and a pure jet engine and mentioned how long I´ve been working on the project, so you didn´t miss anything. Very nice video Anders,you really explaned how turbine engines work! I should have showed them my old Pelle Plutt movie where a face painted on my finger explained the internals of the JU-01 gas turbine. *LOL* You're a mean lookin' dude--wouldn't want to meet you in a dark alley :-) --Steve Moa? Mamas boy no 1? You must have mistaken me for someone else. Get a haircut you hooligan....!! Great work...wish I could understand Sweedish... Cheers, Smithy. A snug haircut is the sh*t, especially when it is starting to thin out in places. Use Moroso climbing gear lube. It attaches to the gear surface and will not sling off. That would probably work if I didn´t have to keep the bearings cooled with oil, it would become a messy mix with both grease and 10/40 oil in there...
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Post by Johansson on Nov 17, 2014 17:43:06 GMT -5
Tonight I made the second and last oil jet, this one was for lubricating the gear mesh. Here I am about to drill the hole in the gearbox casing. The oil jet nozzle is made in brass with a 1mm hole in the end, should flow enough oil to keep the gears happy. Here the nozzle is in place, the jet is pointing at the pinion gear so the oil will reach the gear before the teeth mesh together. With that taken care of I connected the two oil jets with hydraulic tubes in top of the gearbox and ended it with an AN4 male coupling, a steel braided hose will connect them with the main oil line just downstream the oil filter. Next up is to make the gearbox drain line back to the oil tank, I think I have figured out a good way to do it. Cheers! /Anders
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Post by smithy1 on Nov 17, 2014 18:47:31 GMT -5
Perfect....well done Sir.
Can you tell us the gear ratio of the little gearbox please?
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Post by Johansson on Nov 17, 2014 23:54:17 GMT -5
Most certainly, 5:1.
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Post by pitciblackscotland on Nov 18, 2014 3:06:18 GMT -5
Hi Anders, Nice work on the oil jet nozzles, may have to do something like this on my Boeing free power unit.
Cheers, Mark.
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Post by ernie wrenn on Nov 18, 2014 16:25:44 GMT -5
Do you have provision for restrictor jets in the nozzles? Just thinking about controlling the amount of oil to each location..
ernie
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Post by smithy1 on Nov 18, 2014 20:33:24 GMT -5
Do you have provision for restrictor jets in the nozzles? Just thinking about controlling the amount of oil to each location.. ernie I guess he could fit a variable valve in each line, then you could adjust the flow to suit..??
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Post by Johansson on Nov 19, 2014 13:16:11 GMT -5
Do you have provision for restrictor jets in the nozzles? Just thinking about controlling the amount of oil to each location.. ernie Nope, just a 1mm hole drilled in the end. It is very easy to drill a larger hole later and there is no risk of restrictor jets unscrewing and causing havoc inside the gearbox. Needle jets for flow control would only make the risk of accidentally closing off the oil line like 10.000 times higher...
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Post by racket on Nov 19, 2014 15:27:48 GMT -5
Hi Anders
When I made the freepower stage up for the 10/98 engine I used a small "last chance" stainless mesh filter ( thanks Smithy ) in the lube supply connection at the freepower stage .
Cheers John
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Post by Johansson on Nov 19, 2014 17:09:18 GMT -5
Ernie sent me a handful of such nice filters so I´ll make sure to add one to the AN4 hose leading to the gearbox. I repaired the cracked weld in the oil tank an hour ago, it isn´t very fun to tig weld on an uncleaned oil tank but it turned out pretty ok. With the tank welded and back in the frame I could fit the gearbox and start figuring out how to solve the drain. You can see one of the two hose connections at the bottom of the gearbox that I will use, a short length of steel tube will be soldered to them inside the gearbox to get enough oil sump height for oil to reach the output bearings. Here are the two matching hose fittings made in aluminum that I will weld to the top of the oil tank, they will act both as a vent line for the oil tank (will fit a large breather to the gearbox top) and of course as the drain for the oil injected into the bearings and gear mesh. I will need to buy some 17mm ID hose before I can find the right position of the tank fittings and weld them in place. As always I put a new layer of coating on the tail fairing plug, not much left to do on it now before it is time to make the mold for the real fairing. Cheers! /Anders Tjo!
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