Author Topic: Longboy's "SUPER TEE" Model Gas Engine  (Read 4281 times)

Offline Longboy

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Longboy's "SUPER TEE" Model Gas Engine
« on: January 10, 2019, 05:25:15 AM »
Getting hard to create new engine designs or layouts, something you haven't seen before. Maybe you've seen something like this! I can't find it on the Internet. Maybe this engine is something I can call my own then. How bout a multi cylinder inline engine.....with a right angle crankshaft.  :o   I got the preliminary drawing right here:

   

The Super Tee's story starting this weekend!
« Last Edit: January 10, 2019, 05:28:18 AM by Longboy »
Wadda you mean, "It don't run"???

Offline Admiral_dk

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #1 on: January 10, 2019, 11:50:21 AM »
So this officially a teaser then  ;)  :Jester:

Offline Ramon

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #2 on: January 10, 2019, 12:06:52 PM »
Looks like you got that project well blocked out to start then  :D

It'll bring a whole new meaning to 'Time for tea' ;)

Looking forwards to your build - Tug



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Offline Jasonb

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #3 on: January 10, 2019, 12:36:00 PM »
Is it any different to an opposed twin mounted with the shaft vertically rather than horizontally?

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #4 on: January 10, 2019, 04:59:41 PM »
Is it any different to an opposed twin mounted with the shaft vertically rather than horizontally?
Different.....That's a definite Jasonb.
« Last Edit: January 10, 2019, 05:05:01 PM by Longboy »
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Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #5 on: January 10, 2019, 05:03:45 PM »
So this officially a teaser then  ;)  :Jester:
Yes. The cat is in the bag Admiral........but I must let him outta the bag to feed the forum soon!   :ThumbsUp:
Wadda you mean, "It don't run"???

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #6 on: January 11, 2019, 05:00:39 PM »
Aluminum angle stock, both 2x3 & 3x4 .250in. make up the framing with a floor plate joining the vertical legs.



I may shorten the deck on the lower piece depending on components needed there like fuel tank, distributor, etc. We'll see how it goes. Be using SS #6 socket heads hold it square.



So far...... :thinking:...... looks like a reasonable base to build upon!
« Last Edit: January 11, 2019, 05:05:49 PM by Longboy »
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Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #7 on: January 13, 2019, 07:20:27 AM »
The vertical on the 3x4 angle gets a set of brass bearing carriers. A pair of R1810ZZ bearings in each one.



After the boring, fastened on with some 4-40 SS screws. You see here that the center bearing is about a quarter inch lower. The engineering explanation is........is......... ah nobody cares! Looked like the right thing to do at the time I guess.  :facepalm:

« Last Edit: January 20, 2019, 12:10:34 PM by Longboy »
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Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #8 on: January 14, 2019, 04:17:12 PM »
All "geared" to proceed after the predetermined spacing of the bearing carriers in the previous post, I start with crank webs of 12L14 steel. These Traxxas spur gears will be piggy backed to the webs.



These Nylon gears strong and durable for R/C cars with high torque motors will suit the needs of SUPER TEE for starter drive input, possible spark advance kickback and usual low RPM running.

Wadda you mean, "It don't run"???

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #9 on: January 16, 2019, 06:25:45 PM »
Three con rods were made from aluminum stock with a single R166ZZ bearing in the big end.



Doing something different with the small end. Drilled for a 1/8 in. piano wire pin direct into rod. Has worked well on the big end on a couple engines now. The rotating crank webs should sling enough oil under the pistons for lubing the pin. If not, then I retro fit some R144ZZ's in place.



And I already muffed up  :o .....one of the rods needs to be .250in. longer for the center cylinder.
( "pay attention Longboy"!) So now I got spare parts early in the project!  :-\
Wadda you mean, "It don't run"???

Offline Brian Rupnow

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #10 on: January 16, 2019, 09:28:08 PM »
Looks very interesting.---Brian

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #11 on: January 17, 2019, 07:16:09 PM »
Looks very interesting.---Brian

Remembering your advocacy Brian, connecting rods being their own bearing surface.  :ThumbsUp:     Dave
Wadda you mean, "It don't run"???

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #12 on: January 18, 2019, 04:13:13 PM »
SUPER TEE was conceived as a twin originally. After finding the spur gears, the bore centerline spread allowed space for a third cylinder head between #1 and #2 over the crankshaft web and not crowd out the cylinder heads using a one inch bore, thin wall liner.



Boring the deck for #3.

Boring radiators for DOM liners.

Wadda you mean, "It don't run"???

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #13 on: January 20, 2019, 04:33:05 AM »
I prefer the crank webs to this style of weight reduction for the primary balance of the piston/rod assembly over pie shape cutouts adjacent to the throw pin. On SUPER TEE, the webs will be out front and prominent in rotational view.



With the max. diameter bore thru, SUPER TEE is still short on its' testosterone and the piston/ rod hangs straight down.



Shortening the piston shirt and removing metal from the beam helped some......but I needed more weight bias in the web. That solution begins here!





Wadda you mean, "It don't run"???

Offline Chester

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #14 on: January 20, 2019, 02:20:18 PM »
Ive enjoyed all of your engines, very creative. Im sure this one will be great also. Watching intently

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #15 on: January 21, 2019, 07:39:55 PM »
Thanks Chester. "SUPER TEE" is going to have a pretty different layout for inline I/C on its lower end. I like things just a little......and even a lot, out of the ordinary!   
   :stir:  Dave.
Wadda you mean, "It don't run"???

Online crueby

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #16 on: January 21, 2019, 08:13:37 PM »
I am having a hard time visualizing the layout - do you have a diagram of it? Looking very cool so far!

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #17 on: January 21, 2019, 08:37:28 PM »
I am having a hard time visualizing the layout - do you have a diagram of it? Looking very cool so far!

Thanks Crueby. No diagrams on SUPER TEE. Really wildcatting this one. Most likely, you will begin to see it into next weeks postings. That's if I can figure out if the distributor can drive the camshaft.   :thinking: Can you drive a camshaft with a distributor?   :shrug:     Dave.
Wadda you mean, "It don't run"???

Offline Brian Rupnow

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #18 on: January 21, 2019, 08:42:15 PM »
Run your ignition cam off the crankshaft and have a spark every revolution. Set your cylinders up to fire alternately. That way you don't need a distributor. If the piston which is not going up on compression gets a spark at top dead center it's okay--there is nothing in it to burn.

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #19 on: January 22, 2019, 04:06:39 PM »
An extra counterweight on the back side of the spur gear brings the assembly into primary balance. Splitting a steel disk in half and go from there.



Needed about a quarter round for the job. All fasteners on moving assembles......blue Loctited.



With the piston/ rod free spin in the bearing carrier now, balanced to my satisfaction in all clock positions. Test fitted to frame here with cylinder.





Wadda you mean, "It don't run"???

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #20 on: January 24, 2019, 05:31:13 PM »
The radiators with 1 inch bore liners on the deck.



2.25 in. diameter aluminum rounds become cylinder heads.



They need a shave job to sit upon the radiators.



To the mill to give them a butt fit over the cylinders then.



And looking good!    :ThumbsUp:

Wadda you mean, "It don't run"???

Online crueby

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #21 on: January 24, 2019, 06:45:52 PM »
Beautiful work!

Offline MJM460

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #22 on: January 24, 2019, 08:37:52 PM »
Beautiful work and great concept.  Those contra rotating gears offer some interesting balancing possibilities.

Is there a specific purpose for the right angle drive shaft?

MJM460
The more I learn, the more I find that I still have to learn!

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #23 on: January 25, 2019, 06:01:29 PM »
Beautiful work and great concept.  Those contra rotating gears offer some interesting balancing possibilities.

Is there a specific purpose for the right angle drive shaft?

MJM460

Thank MJM.  That stub shaft on the web previous photo, comes into play for a feature onboard.    Dave

« Last Edit: January 26, 2019, 04:50:41 PM by Longboy »
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Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #24 on: January 26, 2019, 04:43:11 PM »
Six valve blocks where made, int. and ex. mounted to the side of the heads in a cross flow porting scheme.



3/4 x 5/16 in. aluminum bar sandwich a brass valve guide. Blue painters tape between the pieces as a gasket. Some 3/16 in. brass tubing with an O-ring seal tap into the combustion chamber when drawn up by a pair of #4-40 screws.





Wadda you mean, "It don't run"???

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #25 on: January 28, 2019, 05:56:16 PM »
The intake valve bocks are reversed, valve upright for clearance of accessories and components found under the intake manifold. CM-6 spark plugs direct, upright center in the heads. #4-40 socket screws below the surface of heads thread into the radiators with my usual O-ring head gasket.



The valve springs are purchased for the ex valves . Intake springs for atmospheric valves hand wrapped around a arbor shaft slow turned on lathe from some K&S .015 piano wire. Brass spring retainers are threaded onto the valves stems, 6-32 thread.

Time for some fork legs as the cylinders mounted tip the frame over now.

« Last Edit: January 28, 2019, 06:05:26 PM by Longboy »
Wadda you mean, "It don't run"???

Offline b.lindsey

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #26 on: January 28, 2019, 11:01:28 PM »
It certainly is moving along rapidly. Very interesting build...still following along.

Bill

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #27 on: January 30, 2019, 05:03:59 PM »
     Can distributor drive a camshaft?  You Bet!    :ThumbsUp:

On the lead edge of the cylinder deck a couple bearing posts mount the camshaft. The distributor shaft on the lower deck passes under the heads and between the radiators on #1 and #2 cyl. and connect the two via these brass 24T- .5 Mod 90 degree bevel gears on 3/16 in. shafts.



The distributor body mounted to some scrap angle, bolted to the lower deck. A brass bushing in the distributor and a roller in the bearing post for support.



The cam lobes are fashioned from 3/8 in. round CR. Drilled/ reamed, machined cut ramps and hand filed finished profile. 4-40 set screws tie them to the shaft then.


« Last Edit: January 30, 2019, 05:13:52 PM by Longboy »
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Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #28 on: February 01, 2019, 05:45:34 PM »
The distributor drive is furnished by 20/40 MXL belt cogs. Deck slot milled in for a straight to distributor shaft connection with the drive belt. Dist. cap is 3/4 in. internal diameter PVC end cap dressed with #8 brass screws for wire connection.




From 3/8 brass hex stock, a post and idler wheel keep the top of belt from dragging against the end of the slot.



And from the underside. On the right in the photo is the cam trigger for the Tecumseh points set. To the left of the cog....some kind of "mystery disk".  :o 
 Back on the top side, I see now that I will have room for an accessory between the 40 tooth cog and the back of vertical leg of the tall frame piece.....very pleased!  :)  Off to Ace Hardware to get the accessory!

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Offline cnr6400

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #29 on: February 01, 2019, 07:48:11 PM »
Suggestion - if you add a support to each shaft next to each mitre gear it will be much easier to maintain mesh. Without support, the long shafts may flex and cause the gears to deflect away from each other and get out of mesh. Just food for thought.

Offline Art K

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #30 on: February 02, 2019, 12:50:40 AM »
Just thought I'd let you know that I'm following along. Have to admit this is a mighty peculiar engine. :ThumbsUp:
Art
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Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #31 on: February 03, 2019, 01:35:43 PM »
SUPER TEE will now be a fan cooled motor! A pair of 2 in. dia. fan blades from Ace breezes air between the cylinders at twice crank speed. Hubs are made from Delrin and are epoxyed to the fan hub recessed area. The right side fan is pressed fit onto a shaft riding in a bearing post.



The left fan hub is over bored with a # 11 or #12 drill bit to the 3/16 in. distributor shaft to free spin upon in counter rotation to the distributor drive. The fans turn counter clockwise. O-rings bring the power up driven by the stub shaft for #3 cylinder.

Wadda you mean, "It don't run"???

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #32 on: February 05, 2019, 05:52:35 AM »
A bar of Delrin for the intake manifold.



Ported for some brass 3/16 in. tubing to the valve blocks.



Trimming excess material away after port holes drilled.



The Traxxas carburetor is mounted horizontal from the bottom on a barrel plenum chamber. #4-40 screws draw it up to the manifold body.





Fitment to engine before trim.

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Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #33 on: February 06, 2019, 05:16:15 PM »
A straight shot in from the distributor for the wiring to the spark plugs.



I didn't find the proper stainless plug clips on Ebay this time. These mini 'gator clips do the job and look fine.    :ThumbsUp:

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Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #34 on: February 08, 2019, 05:27:52 AM »

Finalizing SUPER TEE! A free standing engine, vertical fuel tank strapped to the side. Just no room on the deck for it!



Some paint work now and re-assembly. Tighten up the loose items, loosen up the tight items and then readied for run trials. You will get your first look/see at the business side of this engine......this weekend! :popcorn:

Wadda you mean, "It don't run"???

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #35 on: February 09, 2019, 04:50:12 PM »
Although it looks a little disconcerting, the crank pin phasing is correct for SUPER TEE.  :)



And now...."A Little Engineering Explanation" by Longboy!  :Lol:

Crank pins for 3 cylinder engines are at 120 degrees. Looks like the figure on left at 12, 4 and 8 o'clock position looking end wise down crankshaft. For a geared crankshaft, it is 12, 8 and 8 looking across, right to left next figure. Firing order 1-2-3.



Yep.....I did  :facepalm: ......do a 12,4,8 set-up initially and it looked outta wack, the pistons coming up to TDC then.  Apparently, I did get it right figuring in the counter rotation.   :whoohoo:

Come back tomorrow to see SUPER TEE at work!   :cheers:

Wadda you mean, "It don't run"???

Online crueby

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #36 on: February 09, 2019, 05:41:13 PM »
Looking forward to seeing this in action!

Offline Admiral_dk

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #37 on: February 09, 2019, 09:03:15 PM »
Quote
Come back tomorrow to see SUPER TEE at work!   :cheers:

You're such a tease  :LittleDevil:     But I will still look forward to see the video  :cartwheel:

Online crueby

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #38 on: February 09, 2019, 09:05:48 PM »
Quote
Come back tomorrow to see SUPER TEE at work!   :cheers:

You're such a tease  :LittleDevil:     But I will still look forward to see the video  :cartwheel:
Wait, wait, he said see it 'at work', not how it works. First a video of it at work, then a video of it on vacation...   :facepalm2:

 :Lol:

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #39 on: February 10, 2019, 05:36:20 PM »
Welcome to todays introduction of the Longboy "SUPER TEE" model gas engine! From the opening post: "an inline engine with a right angle crank". What does that look like?  :noidea:  A simple graphic as a teaser. Some of you may have envisioned it after the gears to web post entry. Others.....just unsure as the story continued. Combing thru Google images of I/C engines, nothing came up at the start of this project. Seen geared together crankshafts but no geared cylinders to crank........and then in the middle of the build and some changes in the search wording, a U.S.patent from 2015. No running prototype and the developer has passed away. I can't claim the premise of this design beyond modeling another's work for real life application. I can say the layout proven, makes for an excellent running model. And that has it's own satisfaction!   :)    Dave 

   

3 cylinders. 43CC's. Bore & Stroke: 1.0 x 1.125 inch.



Build of SUPER TEE started Sept 5th and completed Nov 9th. (10 weeks).



Something new! Featuring geared cylinders to crankshaft. :o

SUPER TEE is a fine runner!



     

 

   

     









See it now!

 
     
Thanks for coming by to follow the progression of SUPER TEE. Share your thoughts and questions. Sometimes....I have answers! Dave      :cheers:
Wadda you mean, "It don't run"???

Online crueby

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #40 on: February 10, 2019, 06:12:32 PM »
Very slick!  Sounds like a hot rod warming up before the drag race!
 :ThumbsUp: :ThumbsUp: :ThumbsUp:

Offline Brian Rupnow

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #41 on: February 10, 2019, 06:58:14 PM »
Congratulations. a very nice running and innovative engine.---Brian

Offline yogi

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #42 on: February 10, 2019, 08:51:12 PM »
Very interesting engine! Well done!  :ThumbsUp: :ThumbsUp: :ThumbsUp:
I like your style of engine building.  :cheers:
Thanks for sharing your build.

Offline Admiral_dk

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #43 on: February 10, 2019, 09:38:18 PM »
It certainly runs nicely and is a very alternative take on an IC engine design  :praise2:

Offline ShopShoe

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #44 on: February 11, 2019, 01:18:01 PM »
Very Interesting and a very nice build.

Thank You for posting

ShopShoe

Offline Longboy

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Re: Longboy's "SUPER TEE" Model Gas Engine
« Reply #45 on: February 15, 2019, 06:46:29 PM »
   The smoothness of Super Tee.

Wadda you mean, "It don't run"???