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1997 GTX off season closed loop RV lubrication study.

AquaEye

AquaEye

Premium Member
Premium Member

Convection Current - GCSE Physics Practical.​

This is the start.
www.youtube.com/watch?v=Ph4Re3CrUmY
Have two spare 787 motors from a barnyard find. One my son shall rebuild & the other I'm going to use for numerous crazy arse experiments in RV lubrications, yes sir.
Got to construct a practical, working lab bench + a half dozen other items. Will video when I get all the ducks lined up.
Try to get it done by late April, or not.
Julius-Miller-chalkboard (1).webp
 
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So this is the basic "meat & potatoes" of the construct. Of course there will be tailored changes to product design as the study progresses.
All this is to introduce thermal difference to induce thermal convection/flow.
TANK-CT1L8B-L.jpgTANK-CT1L6B-SIDE-L.jpg1ltr anodized
31b5l6Eco3L.jpgL X W TBD
ALL52100__80773.jpg
Can be cut to length
BTR-12JF-L.jpgDW-BTR-12JF.jpgMeh, maybe?

Order of placement within oil circuit TBD after lab bench studies.
All fitting will be 8AN with the option of changing to lessor to accommodate a smaller dia hose if warranted. (static line pressure considered)
All this to knock tank temps down as much as possible w/o compromising too much "real-estate"(?)
 
Kinda in a spot here. There is one aspect of this study that I just don't have the components to perform but imo, is a necessary discovery to dive into.
So that being said, I'm in need of the two inner crank seals. The metal cannot be bent or missing rubber material but the rest can be worn both ID & OD, cracked, warped rubber etc. Absolutely no use to anyone but to be tossed in the trash can or sent to me.
Here's why. With the crank/seals, (both in good shape from the "barnyard find"), removed, install the two individual seals with rubber expansion plugs with sealer inserted in the middle's to contain oil within cavity, sealant applied, seal groove/od around gear cavity, torque cases down>cure.
Create/duplicate the best I can, the conditions of a working gear, heat & rotation etc. Spin up the gear @ varying RPM's, step back & see what happens in oil circulation on a "tailored" circuit.
I think you know what I'm trying to accomplish here.
Anyway, I'll pay for shipping & handling & when received I will send you a gift card for $10 for a burger @ a joint of your choosing.
You have my word on this.
DM if you can donate.
 
Jeff @ Competitive Crankshafts came thru for me in a pinch.
Thank you so much Jeff.
 
What are you trying to accomplish by circulating the oil? If there was a need to circulate and/or filter oil, then an oil pump would have been included decades ago. These are old engine designs and the oil bath works fine.
 
WhiskeyD said:
What are you trying to accomplish by circulating the oil? If there was a need to circulate and/or filter oil, then an oil pump would have been included decades ago. These are old engine designs and the oil bath works fine.
Click to expand...
"Trying to accomplish"?
No try to it. It will occur.
What you consider "fine", I do not.
I can because I can, it's a free country.
Cancel elsewhere.
 
Trivial FYI capacity observations using XPS 2T syn oil.
1 ltr
830.9 gr
29.3 oz
1.83 lbs
12mm OEM line @ 18"
36.3 gr
1.28 oz
.077 lbs
Aftermarket oil filter
18 ml
14.8 gr
.525 oz
.033 lbs
3/8 line @ 12"
15 ml
15.0 gr
1/4 line @ 18"
13 ml
10.3 gr
 
AquaEye said:
"Trying to accomplish"?
No try to it. It will occur.
What you consider "fine", I do not.
I can because I can, it's a free country.
Cancel elsewhere.
Click to expand...
I don't think Whiskey is trying to cancel you Aquaeye..just attempting to understand what you are building and it's desired effect, as am I.

Can you explain the experiment for the rest of the class??

Could you diagram your working model and how the components fit? And what are the old seals for?
 
WhiskeyD said:
I didn’t realize we had a genius here that’s knows more than the BRP engineers
Click to expand...
I think Aquaeye is an 'outside the box' experimentalist.

An experimentalist builds strictly with function and performance in mind...willing to challenge the standard practice to add back the durability or performance the engineers left on the table in order to save in materials cost or simplify for mass manufacturing.

We all know history has a hundred examples of design issues engineers either didn't see or chose to overlook!!

The aftermarket is rife with add-ons for all manner of machine to make something out last or out perform standard engineering design...most are created by non-engineer, DIY types!!
 
dougamclean said:
I don't think Whiskey is trying to cancel you Aquaeye..just attempting to understand what you are building and it's desired effect, as am I.

Can you explain the experiment for the rest of the class??

Could you diagram your working model and how the components fit? And what are the old seals for?
Click to expand...
To be revealed on the video in late April.
But I can tell you this much, this is not an experiment. This has already been applied to the aviation Rotax's by a few enthusiast.
Their advantage is they have the luxury of air cooled real-estate. Huge temp differential, ample flow/circulation.
Where as I, do not.
This works. It's proven, actionable science.
 
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