Durbans radiator con progress

[durban]

Re: Durbans radiator con progress

Ole Evinrude only had a 3rd grade education, BUT- he did apprentice in a machine shop and study math, mechanics and engineering in his spare time and was a born inventor. You have the born inventor part in great measure.
The math and science stuff (like thermodynamics) are merely tools to use to make the invention part easier and quicker.
Unfortunately, there is a paradox involved. In the process of gaining all of the math and science and engineering knowledge, in many cases the inventiveness (creativity) part is greatly reduced or stunted through the education process. Most engineers are not inventors on a large scale.

That said, your particular large problem is to get a great amount of heat from one place (the motor) to another place (the air or the ocean). You are using water or a water/glycol mix to move the heat around. "X" Watts of heat from the motor need to get moved from the motor, into the water, into the radiator, and exchanged into the air. If you know the volume of water (and pressure and velocity; all related) moving through the radiator you can figure out how much heat is exchanged with the air at different ambient temperatures and with different air flows (also a velocity/volume problem) through the radiator.

As to the real problem you're trying to solve, the "salt water motor slowly dissolves over time" problem, I currently run 3 motors over 40 years old that ran in salt water at least 25 years. The secret to that was WD40 in a spray bottle by the gallon and faithful flushing with "Whaler's secret formula". Dawn dishwashing liquid.
Good luck, and keep up the inventiveness and curiosity!

no worry , i spent 4 years at technical collage for diploma in engineering , the motor so far runs at about 2000 rpm through 10lts of fuel , so some thing must be working so far , cheers

 

[durban]

Re: Durbans radiator con progress

just to mention PLAN B so far works in this experiment , just waiting for my m8t to get parts for his 90hp starter & PLAN B will be tested there

 

[tx1961whaler]

Re: Durbans radiator con progress

I forgot what Plan B is?

 

[durban]

Re: Durbans radiator con progress

I forgot what Plan B is?

you will find PLAN B here

http://forums.iboats.com/showthread.php?t=557547

 

[clanton]

Re: Durbans radiator con progress

Durban,


The 3 cylinder evinrude engine was also converted to power a gyro copter, used water cooling and radiator. Search evinrude gyro copter engine, this was a home made project.


Clanton

 

[durban]

Re: Durbans radiator con progress

that was me i joined that site a few days ago , you will see my user name there durban , this is my next project

 

[nwcove]

Re: Durbans radiator con progress

you plan to use an ob powerhead for a power plant on a heli? i truely enjoy your "thinking outside the box posts", but dont want to see your posts end !!!! plz skip the airborn stuff!!

 

[durban]

Re: Durbans radiator con progress

i was thinking about this a few days ago so i joined that site to see if i could get info & build my own helicopter as ive always wanted to fly a helicopter & joined gryco on thier facebook , so some one on that site has taged on that iam onto a good thing , i hold the secret to do the mods ,& that they will not get from me . i used to enjoy flying in helicopters when i was in the South African army .
this new water cooled out board motor has got a lot of potential for some one with finance . johson factory must look into this .

 

[Faztbullet]

Re: Durbans radiator con progress

this new water cooled out board motor has got a lot of potential for some one with finance . johson factory must look into this .

They are called Rotax engines and usually makes more hp to weight ratio than a Outboard engine, the 582 makes 65 hp,is water cooled and with gearbox weighs 116lbs

 

[durban]

Re: Durbans radiator con progress

i do,nt know about aircraft motors , you know more , i think i would rather stay with boating as there are no fish in the sky , cheers

 

[durban]

Re: Durbans radiator con progress

made a cowling cover & fitted radiator & fan , am extremely happy so far if it doesn't work i go plan B some finishing off work still to do .then after this project i want to get a job on a Super Yacht .as i love boats & motors & have worked on a Cargo Ship as an engineer any leads will be appreciated

 

[durban]

Re: Durbans radiator con progress

some work has gone into getting water to circulate in the adapt-or plate some modifications

 

[boobie]

Re: Durbans radiator con progress

So was the 1972 V-4, same thing. Seen one at Oshkosh WI one yr at the EAA convention. Couldn't believe it but it flew.

 

[durban]

Re: Durbans radiator con progress

Hey boobie , one day if you hear an out board motor coming down the road you with boat in tow you,ll know its me coming to pick you up for fishing k m8t , ha ha , still work to do on my boat . cheers:joyous:

 

[TN-25]

Re: Durbans radiator con progress

I remember reading about a small helicopter back in the early 1970s that was powered by an OMC V4. I also have a picture in a December 1970 Hot Rod Magazine of a sand rail (dune buggy) powered by an OMC V4 with a radiator at the top of the roll cage.
It's funny but 2 days ago I was thinking about how much more effective water cooling was on an outboard motor for all but trolling speeds. For running WOT you have the whole lake as cooling water; a limitless supply to keep things cool at WOT. In a lake the heated discharge is negligable, far less significant then a drop in a bucket. Running an outboard in a bucket will see the water heat up though. People have apparently run 2 cycle outboard motors on a closed cooling system. There are closed cooling systems for stern drives operated in salt water; how does that work? Is there a heat exchanger between the sea water and the closed recirculated water system?

Keep forging ahead with your ideas Durban

 

[Faztbullet]

Re: Durbans radiator con progress

There are closed cooling systems for stern drives operated in salt water; how does that work? Is there a heat exchanger between the sea water and the closed recirculated water system?

Yes and they do clog up and restrict cooling...... People have adapted outboards powerheads on/in all types of projects, from sand rails, chain saws, go-carts, blenders, jet skis and I/O boats. Johnson had a V-4 powered I/O boat back in late 50's early 70's.
2 Stroke V8 in a Sand Car - YouTube
Kiekhaefer KA-211 Chainsaw Disston DA-211 - YouTube

 

[Scott Danforth]

Re: Durbans radiator con progress

It's funny but 2 days ago I was thinking about how much more effective water cooling was on an outboard motor for all but trolling speeds. For running WOT you have the whole lake as cooling water; a limitless supply to keep things cool at WOT. In a lake the heated discharge is negligable, far less significant then a drop in a bucket. Running an outboard in a bucket will see the water heat up though. People have apparently run 2 cycle outboard motors on a closed cooling system. There are closed cooling systems for stern drives operated in salt water; how does that work? Is there a heat exchanger between the sea water and the closed recirculated water system?

exactly. the largest radiator available is the water. closed cooling systems for marine motors rely on a heat exchanger with significantly more surface area than needed when new to account for fouling and lack of maintenance (Faztbullet's comment on cloging and restricting). liquid to liquid heat exchangers are much more efficient than liquid to air (radiator).

While a radiator may work at low power consumption (idle) in this application, I do not believe it will work under load.

There is a reason why millions of outboards are not cooled with a radiator from the manufacturer