head in the stratosphere ?????????????????????????

[dwilfong]

OK its bin really mundane here lately and my brain is ready to go now after 2 1/2 years on the road.
I have a brain storm building and will let it loose here soon after my new shop is done next year.
I have a vision of two engines in one.
A piston ported one like the norm in gas eng with a completely different engine riding on top in the same jug.
May even inject it with a direct injection hole run buy a pump in the sleeve. Thank you Andy.........................
Babby steps.......LOL
Two carburetor's like the K eng...............................................
Two different intake tracks not connected at all.
The bottom side will be 4 small ports running threw the piston and at 4 corners of the cylinder like the NORMAL gas eng.
This will be the one run with oil to keep it all lubed up like a normal gas engine.
The top side will have its own carb and not need oil in the mix as the bottom side will do that.
Thy use this now to inject fresh air in-between the incoming charge and the ex charge to keep unburnt fuel from puking out the ex for emission in weed wackers and chain saws.
Now F the green weenies and stick a NITRO charge in it's place???????
O and a WT499 on the bottom side running 80/20 with the bag. Have to coddle the gas passers....LOL
Hard tank with pipe pressure , needle and NITRO on the top.
Glow plug to light it off and keep the ignition simple and light.
I will just leave this here......................................................................................................
Next year will be a good year for NITRO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I am retired now and have all the time in the world.......................................
Lets get the party started...............................

 

[LohringMiller]

That's starting to sound like a version of an opposed piston engine I was working on. It fit the GX twin category with two crankcases each scavenging a pair of transfers. There would be a carb for each crankcase. Each crankshaft would drive a propeller and were counterrotating. The two exhaust ports were joined into a single pipe. I was using Quickdraw crankcases, but I would redesign it with the upper crankcases as part of the cylinder and everything 3D printed. I would still use off the shelf crankshafts and connecting rods. The pistons would need to be custom. Below are some pictures. The passage model gives a better idea of the design.

Lohring Miller

 

[RaceMechaniX]

Pretty cool Lohring, what crank phase offset are you planning?

 

[LohringMiller]

I "tested" (in a simulation) several leads. Below are the power curves. The number after the "us" is the lead. The lead mostly biases the curve to higher or lower rpm at similar powers.

I also simulated a lot of flows and pressures. I got another guy to simulate the flows through the engine at bottom dead center with the simulated flows and pressures. The big issue was scavenging the center of the bore, even though the long cylinder should scavenge well. The phasing from long and short transfers as well as various swirl and up angles didn't fix the problem. The guy got tired of running all the tests so I would need to learn how to use Fusion 360's pipe flow simulation. After all that it would still take a lot of development work. Below is a video from one of the flow tests for the twin pipe version.

Lohring Miller

 

[RaceMechaniX]

We were running quite a bit more asymmetry, 30Deg in the smaller 30CC, 10kRPM engine and between 15-18Deg in the larger 2.5L engine. We did a lot of work to create swirl on the intake ports to help scavenge the residuals in the center of the cylinder. In the 30cc engine we had a positive displacement piston compressor with roughly a 2.5:1 compression ratio and the large engine was mechanically supercharged plus turbochargered. Later it was driven by en eTurbo which is now entering production:

 

[dwilfong]

The idea I see in my head is the 4 small ports will be PUMPED in to the cylinder from the piston action like a normal gas eng.
Case volume will be minimized as much as it can.
This will be the jets to get the party going when the 3 separate ports boosts and transfers like a Nitro eng with there own carb will open up.
This top side section will have a strait shot to the ports.
This will look like two tea cup handles on the side of the eng and a strait shot boost port.
I am planning on trying my hand at casting my own jug and making a billet lower case with two end caps from round stock.
Will make the sleeve with some ductile iron stock this will give better control over the flow angles entering the cylinder.
Will use off the shelf parts for the crank, rods and pistons.
And of course I will build my own pipe for this eng.
The pipe will take control of the flow at speed and will be the key to making it work.
No valves in the way gust a piston. Strait shot thew the engine.

 

[LohringMiller]

David, I got setup for casting with a foundry, sand casting stuff, as well as a burn out furnace and vacuum setup for investment casting. Then I discovered 3D modeling and 3D printing. I've only had one metal part 3D printed, but the cost was reasonable even in stainless steel. Learning the 3D modeling program was the hard part. These days I'd get a quote from PCBWay, though my parts were printed through Shapways. The last time I got a quote for a propeller design it was about the same as a raw ABC or Octura prop. Metal 3D printed parts still need some finishing like castings.

Do you have drawings or a sketch of your design? I can help with 3D modeling if you want.

Tyler, I absolutely love the electric turbos. I don't understand why companies like Achates insist on mechanical blowers for their opposed piston engines. There is still a market for high power diesels and two strokes should be great with modern design. I also love the complexity of the Porsche engine. However, my 2018 Model 3 performance model goes 0 to 60 in around 3 seconds, and costs around $40,000 today. It goes from 45 to over 90 in the length of a log truck when passing. It also gets close to the equivalent of 120 mpg when driven by an 80+ year old man running "full self driving". LOL It's powerplant is stupidly simple mechanically.

My last work on the opposed engine was before Covid. Your high leads would be interesting to explore. The crankcase "pumps" are only for starting. The pipe acts like a turbo when the engine is producing power. I was trying to put swirl and up angle on one pair of ports with the other pair directed across the piston to create a rising column in the middle. The difference in transfer lengths would give separated scavenging columns. I would need to do a lot more flow simulations to find the combination that's best.

Lohring Miller

 

[dwilfong]

Lohring I am going to make my own furnace. Plenty of videos on YouTube on how to build one with a propane burner out of a trash can.
Want to try sand casting for the jug. some thing I have bin wanting to try for some time.
I want to keep this eng SIMPLE and use as many off the shelf parts as I can.
Not looking at reinventing the wheel just make it spin faster.
I am looking at it like the SR71 eng. normal eng to get it up to speed then by passing all the moving parts and making a scram jet section.
Will be interesting to see how the pipe will work at controlling the flow in the eng on its own.
Also the port timings for the two different sections of the eng.
Thinking I can put lots of timing in the boost and transfers of the stratified section as the case run section will handle the low speed running and can run very low timings to get a good pulse from the case pressure built up.
The top side will be controlled by its own servo and can be opened up any time with mix controls on the radio.
With the 4 case run jets at 4 corners the main top side transfers can just collide in the center and get directed by the high angles of the jets.
This should also help fill the voids near the cylinder walls.
Hopefully then the boost will have enough momentum to roll it all over the top.
It will have a standard 3 port ex with side wings to reach back in to the cylinder.
I may at some point add a rotary power valve on the ex to block off the side wings and reduce the ex port size. this can also be controlled by its own servo and mixed in with the radio.
I may even try and learn code and make a controller for the system ........baby steeps one at a time.
It is really a standard R/C weedwhacker eng with a separate intake to by pass the case interference.
Will mount in the place of a normal R/C eng in are little boats.
I am working as a USFS campground host at Mount Hood this summer. would love to come see you and talk some in person.


Here is a good read on this type of eng.
https://patents.google.com/patent/US20050139179A1/en

 

[LohringMiller]

Very interesting and not what I was picturing. If you want a small, propane fired furnace and crucible, I have one. It's free, but the shipping might be an issue. I have a small wood cope and drag as well. It could give you a start. They're free, but shipping costs could be an issue.

Lohring Miller

 

[dwilfong]

It is only a few

Very interesting and not what I was picturing. If you want a small, propane fired furnace and crucible, I have one. It's free, but the shipping might be an issue. I have a small wood cope and drag as well. It could give you a start. They're free, but shipping costs could be an issue.

Lohring Miller

You are only a 2 hour drive from me and I have a truck.
Give me a call some time.
386 795 0051

 

[dwilfong]

Well I am back home in Florida at the new house.
I have started the building of the new work shop.
In a twist of fait I have bin diagnosed with very nasty form of AML. Going threw chemo therapy as I type.
Not sure of the future but I will try and complete this if it is the last thing I do.
If nothing else will start posting drawings of my ideas so in the future maybe it will inspire some one to pick up the torch and carry on.
Lohring did not have the energy to come and see you. Wish I could have talked with you in person.

 

[larcor69]

Good luck and praying for a speedy recovery

 

[Jeff Barnes]

Lots of good doctors out there these days go luck on your journey we'll be praying for you Jeff and Kim Barnes

 

[Timbo Whalen]

Lohring I am going to make my own furnace. Plenty of videos on YouTube on how to build one with a propane burner out of a trash can.
Want to try sand casting for the jug. some thing I have bin wanting to try for some time.
I want to keep this eng SIMPLE and use as many off the shelf parts as I can.
Not looking at reinventing the wheel just make it spin faster.
I am looking at it like the SR71 eng. normal eng to get it up to speed then by passing all the moving parts and making a scram jet section.
Will be interesting to see how the pipe will work at controlling the flow in the eng on its own.
Also the port timings for the two different sections of the eng.
Thinking I can put lots of timing in the boost and transfers of the stratified section as the case run section will handle the low speed running and can run very low timings to get a good pulse from the case pressure built up.
The top side will be controlled by its own servo and can be opened up any time with mix controls on the radio.
With the 4 case run jets at 4 corners the main top side transfers can just collide in the center and get directed by the high angles of the jets.
This should also help fill the voids near the cylinder walls.
Hopefully then the boost will have enough momentum to roll it all over the top.
It will have a standard 3 port ex with side wings to reach back in to the cylinder.
I may at some point add a rotary power valve on the ex to block off the side wings and reduce the ex port size. this can also be controlled by its own servo and mixed in with the radio.
I may even try and learn code and make a controller for the system ........baby steeps one at a time.
It is really a standard R/C weedwhacker eng with a separate intake to by pass the case interference.
Will mount in the place of a normal R/C eng in are little boats.
I am working as a USFS campground host at Mount Hood this summer. would love to come see you and talk some in person.


Here is a good read on this type of eng.
https://patents.google.com/patent/US20050139179A1/en

Dave, you're crazy....but I like the way you think. You've been gone for far too long.

Whatever became of Project Vector, anyway?

 

[Wasted wages]

Well I am back home in Florida at the new house.
I have started the building of the new work shop.
In a twist of fait I have bin diagnosed with very nasty form of AML. Going threw chemo therapy as I type.
Not sure of the future but I will try and complete this if it is the last thing I do.
If nothing else will start posting drawings of my ideas so in the future maybe it will inspire some one to pick up the torch and carry on.
Lohring did not have the energy to come and see you. Wish I could have talked with you in person.

Good luck with your journey,, if I may, please check with MD Anderson cancer center in Houston… my wife had AML… they gave her a 27% survival rating..
The doctors at MD Anderson did some amazing things for her.. she had a stem cell transplant, and it gave her another chance at life. She went into total remission and was able to enjoy another 15 years of life…

Good luck!

Edit: BTW, if you are able to get in at MDA,
There are a few places that you and your family can stay at no charge.. one is called “Hope house” provided by the American cancer society.. this was were we stayed during her treatments when I lived in Dallas. I have since moved to Houston…

if you have any questions or I can help in any way with providing transportation etc, around Houston, don’t hesitate to reach out to me in a PM ..
You got this brother!!

 

[dwilfong]

Dave, you're crazy....but I like the way you think. You've been gone for far too long.

Whatever became of Project Vector, anyway?

Turn out good.
doing 90+ in the chop in this pic.
Sold the boat with out the engine to a young man from NC 4 years ago for cheep to pass it on when I sold every thing off to travel.
Sold all the motor parts separate and got my $ back on the whole deal.
Was a blast to build and even more to FLY......................................................

 

[dwilfong]

Good luck with your journey,, if I may, please check with MD Anderson cancer center in Houston… my wife had AML… they gave her a 27% survival rating..
The doctors at MD Anderson did some amazing things for her.. she had a stem cell transplant, and it gave her another chance at life. She went into total remission and was able to enjoy another 15 years of life…

Good luck!

Edit: BTW, if you are able to get in at MDA,
There are a few places that you and your family can stay at no charge.. one is called “Hope house” provided by the American cancer society.. this was were we stayed during her treatments when I lived in Dallas. I have since moved to Houston…

if you have any questions or I can help in any way with providing transportation etc, around Houston, don’t hesitate to reach out to me in a PM ..
You got this brother!!

The strain I have is not curable at this point in time.
Thy said marrow transplants have never worked with this one in the past.
It always comes back quick.
Do not want to spend 4 months in hell for nothing.
So we just take the pill chemo and see what happens at this point.
It is what it is...........just taking it one say at a time right now.
We all have to die some time...........................
only the good die young.............LOL

 

[dwilfong]

Thanks for all the support but would like to keep this tread on track with the task at hand.
The ENGINE from hell.............................
Will do some drawings here soon to try and explain what I see in my head.

 

[Jeff Barnes]

Thanks for all the beautiful travel pictures that you took on your travels I always lived like everyday was your last full throttle baby!!!

 

[dwilfong]

Thanks for all the beautiful travel pictures that you took on your travels I always lived like everyday was your last full throttle baby!!!

I would clim up this old ski slope in Alaska every day with my new buddy Gunner and sit on a rock and say I could die tmorrow and I would be happy.
So every day is god given to me now.
Hopfully he will give me the power to finish one more task.