Author Topic: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE  (Read 10606 times)

Offline 777engman

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HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« on: October 21, 2014, 06:42:12 AM »
Here is my first ever engine, scratch built from my own design but using Russian mk12 b cylinder liners and pistons. made everything else in my own workshop tho. This is an alternate firing in-line twin glo engine, has 1 piece con rods and a 2 piece crank. rods are 2024 t6 alloy case and heads etc are all 6061 t651 alloy, crankshaft is 4140 steel.
« Last Edit: October 21, 2014, 06:50:21 AM by 777engman »

Offline Ramon Wilson

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #1 on: October 21, 2014, 09:05:30 AM »
Very nice result for a first off Dean  :ThumbsUp:

What's the induction system - reed ? How do you find that if so?
Have often thought about doing the same at some stage with the Racer as the basis but never favoured using a reed.

I cant quite get my head round that form of induction on a twin cylinder if it's not a 'Boxer' layout though -  if it is a reed - how would the second cylinder create a suction as the first is descending and pumping  :-\ Does one cylinder 'lead' the other ? and have more 'drive' than the other?

All very intriguing and very interesting  - could you find the time to explain your induction systems on your multi cylinders and how they have proved running wise? Short of two separated case volumes I can't quite get my old addled brain on quite how fuel transfers with two pistons doing opposite movements in a common case.

Regards - Ramon
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Offline Admiral_dk

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #2 on: October 22, 2014, 12:05:21 AM »
Nice engine  :praise2: - any chance of a video of it running ?

I'm sure it's got a wall inside to separate the two crankcase volumes (or how to put it ..) that part could be hold in place by the carburettor.

Induction through the crank is possible, but difficult - the other option is to do a piston port induction like my Taplin Twin or GailinNM (a member here  :praise2: ) Lobo Pup.

<a href="https://www.youtube.com/watch?v=PtPvTr94_7w" target="_blank">http://www.youtube.com/watch?v=PtPvTr94_7w</a>

Build log :  http://modelengineeringwebsite.com/Lobo_Pup_twin_1.html

Sorry 777engman - just realized I might be Hijacking your thread - not meaning to.
« Last Edit: October 22, 2014, 12:13:19 AM by Admiral_dk »

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #3 on: October 22, 2014, 07:34:28 AM »
Hey guys thanks for the comments, the induction is really very simple, not reed valve or side port but a centre rotary valve.Basically the crank is a 2 piece affair with the centre spool being a twin ended shaft (flywheels and b.e. pins at each end) with the rotary valve made from the centre bearing portion. This is ported to give intake to each cylinder at 180 deg from each other. The centre main bearing is a split lapped bearing made from aluminium, 6061 t651 is what I use and it seems to work great. The whole bearing crank assembly is then pushed into the crankcase and locked with the venturi. bearing fit to case is a nice sliding fit but close enough to be gas tight.

Ramon the reed induction for the in-line twin engines (not mine) e.g. Oliver twin etc. is generally a side port type set-up where each cylinder works the same principle as a side port engine but it is not piston ported, rather the case is open to the inlet system and a reed is used to time the induction of the fuel mix. Cylinders are timed exactly 180 deg opposite each other and therefore function as 2 singles running on a common crank. The front shaft usually has the drive hole in it with the front big end pin being longer the normal to fit in the hole and drive the prop shaft (just like the rear rotary disc drive on your etas and ed racers) but a bit more substantial.
 As for the multi's I'll upload some pics of the cranks etc. and let you see for yourself, I'll write a bit of an explanation to.

Cheers for now
Dean

Offline Ramon Wilson

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #4 on: October 22, 2014, 12:17:14 PM »
Thanks Dean - I can understand what you are describing but would like to see a drawing or pics (or both) of it if possible. I have a feeling I have seen this central type of 'rotor' induction elsewhere but thought that the set up would lead to binding - obviously not  ::)
It certainly sounds like it would make an in line 'Racer' a viable proposition - hmm! - another to dd to the list  ::)

Yes please then, any further info gratefully received  :ThumbsUp:

Ramon
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(a very apt phrase - thanks to a well meaning MEM friend)

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #5 on: October 22, 2014, 08:08:32 PM »
 ;D No problem mate I'll dismantle the engine and take photos of it and send you the drawings, after I draw them LOL this engine was made from inside my head, designed as i went along kind of.
Dean

 :atcomputer:

Offline Ramon Wilson

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #6 on: October 22, 2014, 08:29:54 PM »
Thanks Dean - I'd appreciate that  :ThumbsUp:

"I ain't here for the long time but I am here for a good time"
(a very apt phrase - thanks to a well meaning MEM friend)

Offline Admiral_dk

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #7 on: October 23, 2014, 12:17:53 AM »
Hi Dean

I would certainly like to see how you did it too - my imaginative solution does not sound so simple as yours and I like to see improvements to my original thinking.

Best wishes

Per

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #8 on: October 27, 2014, 01:44:54 AM »
Hi guys, here is the mk2 version of my first engine, basically the same design but with a bit more time spent in the accuracy and finishing spots.



As these 2 engines are the same design I will strip them down and take a couple of photos of the parts layout and crankshaft assembly.
Cheers for now
Dean

PS I will also do a couple of videos of the running.

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #9 on: November 22, 2016, 01:32:21 AM »
Here are a few more of my engines

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #10 on: November 22, 2016, 08:11:52 PM »
Here's my first two engines now anodized.

Offline Niels Abildgaard

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #11 on: November 24, 2016, 05:38:57 AM »
The V4s are strange and impressive.
Do they have 4 separate crankchambers and is there a picture of parts?
Are some of the parts commercial?

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #12 on: November 24, 2016, 07:47:10 AM »
Hey there, Niels, the v4's are the same working set up as the flat 4's, there is a 1 piece crank with the con rods split on the big end, both the front 2 cylinders are at tdc at the same time while the rear 2 cylinders are at bdc. the four crank big end journals are machined at 90 deg to each other. I don't have a photo of the v4 cranks handy but here is the photos of the V8 crank which is the same set up but with 8 journals not 4.
Hope this helps
Dean

Offline Niels Abildgaard

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #13 on: November 24, 2016, 09:20:06 AM »
Your crankshafts are incredible.

Offline Ramon Wilson

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #14 on: November 24, 2016, 10:26:51 AM »
That truly is awesome work Dean - both the machining and the concept. I'd love to have been there when that V 12 broke into a run - you must have been on a high for days  ;D

Love all those Vee fours too, very impressive indeed. The anodising looks superb and boy do I envy that green - I really must try to source some that shade. All I can say is that from an inspiration point of view the shoes's firmly on the other foot now mate  :praise2: :praise2:

Thanks for your email - will respond later

Ramon
"I ain't here for the long time but I am here for a good time"
(a very apt phrase - thanks to a well meaning MEM friend)

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #15 on: November 24, 2016, 07:59:38 PM »
Hi again Ramon, thanks for the kind comments although I must admit I still stand in awe of your hogging from solid work!!!! The anodizing is easy as mate i don't know why I was so scared of it, just the unknown I think. Anyway you can get all your anodizing dyes etc from these two websites
http://www.caswellplating.com/
http://www.caswellplating.com.au/
 I have purchased from them both and can recommend them. good prices for the right stuff to get the right results reliably. the green dye you want is the green AEN. Actually both the red head and the green head V4's are both reed valve induction, not rotary valve. My mk3 V4 with purple heads is rotary valve induction same as the V8 and the green head flat four. sorry for any confusion and head scratching, LOL.
Cheers
Dean

Offline Admiral_dk

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #16 on: November 24, 2016, 11:57:22 PM »
Thank you very much for the picture of the crank - very informative.

Best wishes

Per

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #17 on: November 25, 2016, 01:08:57 AM »
Your more than welcome mate, I will upload the blown V8 and a couple more V4's as soon as I have them finished. Just in the middle of finishing off a reed valve V8 also so hopefully soon I should have a few more engines to add to the family.
cheers
for now
Dean

p.s. look forward to your email Ramon, and I REALLY like the inline twin ed racer idea, race you to finish one aye?? LOL...

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #18 on: July 22, 2019, 11:20:52 PM »
Hopefully here are some videos of the latest engines Ive just completed
regards
Dean

[youtube1]https://youtu.be/HeXFJ5NaXEw[/youtube1]
[youtube1]https://youtu.be/3dK6khoWDKg[/youtube1]

Offline Ye-Ole Steam Dude

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #19 on: July 22, 2019, 11:48:56 PM »
Hello Dean,

Some really nice looking and running engines, thanks for sharing.

Have a great day,
Thomas
Thomas

Offline b.lindsey

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #20 on: July 23, 2019, 12:36:07 AM »
Very impressive. Thanks for posting the videos!;

Bill

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #21 on: July 23, 2019, 04:39:19 AM »
Thanks, here's a link to my V8 running, prop started but before I anodized it blue


[youtube1]https://youtu.be/Np7zvGrc3U0[/youtube1]

Online Jo

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #22 on: July 23, 2019, 06:10:33 AM »
Nice  8)

Jo
Enjoyment is more important than achievement.

Offline Admiral_dk

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #23 on: July 23, 2019, 10:22:58 PM »
You have been busy making great model engines  :praise2:

Best wishes

Per
« Last Edit: February 12, 2022, 12:54:49 PM by Admiral_dk »

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #24 on: February 12, 2022, 12:13:23 PM »
So been a little while since I posted anything on here so heres a bit of an update
<a href="https://www.youtube.com/watch?v=PvbOO51YF8c" target="_blank">http://www.youtube.com/watch?v=PvbOO51YF8c</a>
<a href="https://www.youtube.com/watch?v=KXCzhIvundI" target="_blank">http://www.youtube.com/watch?v=KXCzhIvundI</a>
<a href="https://www.youtube.com/watch?v=2M6rM9G2PBM" target="_blank">http://www.youtube.com/watch?v=2M6rM9G2PBM</a>
<a href="https://www.youtube.com/watch?v=l41BotHgPRQ" target="_blank">http://www.youtube.com/watch?v=l41BotHgPRQ</a>
<a href="https://www.youtube.com/watch?v=M5woKE0GuFg" target="_blank">http://www.youtube.com/watch?v=M5woKE0GuFg</a>
« Last Edit: February 12, 2022, 12:17:13 PM by 777engman »

Offline Admiral_dk

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #25 on: February 12, 2022, 01:08:46 PM »
Very impressive  :praise2:

Could you please explain how you made the tree cylinder WOHM crankshaft / Inlet system. I do understand the twin and V4's but tree throws 120 degrees apart on the same induction port  :headscratch:

Best wishes

Per

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #26 on: February 12, 2022, 01:35:50 PM »
The three radial engines in the last post are all reed valve induction, three big end journals set 120 deg apart and firing simultaneously.
this engine is front rotary valve induction
<a href="https://www.youtube.com/watch?v=x1ycoaOMdDI" target="_blank">http://www.youtube.com/watch?v=x1ycoaOMdDI</a>
Regards
Dean

Offline Admiral_dk

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #27 on: February 13, 2022, 09:52:29 PM »
Ah - they are 'Big Bang' Engines  ;D

Thanks for clarifying that  :ThumbsUp:

Do you make that as a 'Loose flaping Reed', like old Typhoons, certain Cox models etc. or are the Reed fixed in one end as a Motorcycle Engine ?
In case of the later - I would love to see a picture  ;)

Per

Offline 777engman

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Re: HERE'S MY LITTLE COLLECTION OF ENGINES I'VE MADE
« Reply #28 on: February 19, 2022, 03:28:02 AM »
Reeds are all fixed at one end.
Cheers
Dean

 

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