Author Topic: JLE 14cc Petrol airplane engine (Read 9764 times)

jef · « **on:** September 10, 2017, 08:09:51 PM »

This engine is losely based on the AlKo 14cc from some pictures I saw on the web .
First I made my own drawings in Invertor and then I could start the build .
The engine is alraedy finisched and it has made its first run , I will post pictures of the work regulary .

Cheers Jef

b.lindsey · « **Reply #1 on:** September 10, 2017, 11:36:12 PM »

Glad to see you jumping right in Jef. Nice looking design. Will be following as you post more on the build.

Bill

jef · « **Reply #2 on:** September 11, 2017, 06:56:40 PM »

I started with the backplate of the crankcase , thread cutting M42 x 1 , from "back to front" , so I do not cut in the collar

This is useful when I cut the thread in the crankcase , so that I can try that it fits .

Cheers Jef

Ye-Ole Steam Dude · « **Reply #3 on:** September 11, 2017, 07:16:01 PM »

Very nice Jef.

Thomas

jef · « **Reply #4 on:** September 12, 2017, 12:49:28 PM »

Thanks Bill and Thomas
Some pictures of milling the crankcase , I left a flange to attach on the turning table .

PS ; maybe my English is not always correct but I do my f....ng best

Cheers Jef

Jo · « **Reply #5 on:** September 12, 2017, 12:56:30 PM »

Quote from: jef on September 12, 2017, 12:49:28 PM

PS ; maybe my English is not always correct but I do my f....ng best

Cheers Jef

As we English say "Practise makes ~~perverts~~ perfect" and we don't mind as long as we can watch your engine build thread

Jo

jef · « **Reply #6 on:** September 12, 2017, 05:39:46 PM »

More pics of the work on the crankcase

Cheers Jef

jef · « **Reply #7 on:** September 12, 2017, 09:20:08 PM »

And more pics of the crankcase

Dave Otto · « **Reply #8 on:** September 13, 2017, 01:11:43 AM »

Hi Jef

Looks like you are off to a great start; the work on the crankcase looks very nice!

Dave

jef · « **Reply #9 on:** September 13, 2017, 08:33:32 AM »

Thanks Dave , still some more pics of the crankcase

Cheers Jef

jef · « **Reply #10 on:** September 13, 2017, 08:38:46 AM »

And finaly the last one's

Cheers Jef

jef · « **Reply #11 on:** September 14, 2017, 06:36:39 PM »

The crankcase and backplate are ready , now it's time for the crankshaft , I made it from 42CrMo4 steel

Cheers Jef

yogi · « **Reply #12 on:** September 16, 2017, 10:34:48 PM »

Looking good Jef!

I like how you made the crankshaft...

jef · « **Reply #13 on:** September 17, 2017, 02:53:26 PM »

Thanks Yogi

The conrod is made from 7075 aluminium , I hade to make them twice because I was not to happy about the first one , to little body

Cheers Jef

jef · « **Reply #14 on:** September 17, 2017, 02:56:29 PM »

More photo's of the conrod , the bevels on the smal- and big-end Iturned , in the lenght I used a file .

Cheers Jef

Admiral_dk · « **Reply #15 on:** September 17, 2017, 07:34:44 PM »

Nice work so far - I especially like the conrod

jef · « **Reply #16 on:** September 20, 2017, 10:45:54 AM »

Thanks Admiral_dk

Next some photo's of making the cilinder liner and cover , the liner I made from 42CrMo4 steel , same as the crankshaft and the cover from 6082 aluminium ,
the outside of theliner is a few 1/100 mm larger than the inner of the cover , the liner go's in the freezer and the cover is warming up on the Alladin stove for a shrink fitting

jef · « **Reply #17 on:** September 20, 2017, 10:50:15 AM »

More pic's of cilinder

jef · « **Reply #18 on:** September 20, 2017, 10:54:09 AM »

And the last one's

Ye-Ole Steam Dude · « **Reply #19 on:** September 20, 2017, 11:49:57 AM »

Beautiful workmanship Jef.

Thomas

fishy-steve · « **Reply #20 on:** September 20, 2017, 02:13:48 PM »

Watching along to this!
Thanks for posting Jef.
Steve.

jef · « **Reply #21 on:** September 20, 2017, 07:13:52 PM »

Thankd Thomas and Steve

Making the piston , aluminium 7075

Cheers Jef

jef · « **Reply #22 on:** September 27, 2017, 06:55:13 PM »

Cilinder head

Cheers Jef

Roger B · « **Reply #23 on:** October 11, 2017, 08:26:54 AM »

Very nice work

Not too long before the first trials

Ramon Wilson · « **Reply #24 on:** October 11, 2017, 12:18:27 PM »

I've only just seen this thread Jef - after quite a lay off you have my interest focused

That's some very nice workmanship indeed and a really nice photo coverage of the process

I'll look forwards to watching the rest develop and and see and hear it running in due course.

Regards - Ramon

jef · « **Reply #25 on:** October 28, 2017, 06:49:10 PM »

Thanks Roger & Ramon

Some more pics of making the propdriver .

Cheers Jef

jef · « **Reply #26 on:** October 28, 2017, 06:51:33 PM »

Prop-washer and propnut

Cheers Jef

jef · « **Reply #27 on:** January 19, 2018, 07:01:16 PM »

Some pictures of the ignition pick-up holder

Admiral_dk · « **Reply #28 on:** January 19, 2018, 08:46:57 PM »

It can't be long before the first pops

Ramon Wilson · « **Reply #29 on:** January 19, 2018, 09:49:54 PM »

Yes - nice update Jef

- keep it coming.

Tug

jef · « **Reply #30 on:** January 20, 2018, 08:33:01 AM »

Almost finiched , I had to make the coverplate transfers , inlet manifold and clean the OS carb. ultrasoon
For the piston ring I used one from an OS FS-62-V , but because thats for a four stroke engine
I had to make a little slot for the piston ring pin , with a jig I made for it ,
so it would not turn around in the cilinder , and I still had to put the pin in the piston ring groove .

jef · « **Reply #31 on:** January 20, 2018, 08:37:39 AM »

Pin in piston ring groove , first drill with 1 mm 5 mm deep , than 1,1 mm 2 mm deep
cut a piece from a 1,1 mm bore and press it in the hole , than gring it to the exact lenght in the lathe .

Admiral_dk · « **Reply #32 on:** January 20, 2018, 11:20:02 AM »

A very important lock-pin and nicely executed insert

ThomasM · « **Reply #33 on:** January 20, 2018, 04:44:09 PM »

Hello Jef,

This is a nice two stroke design. The ports look they are designed for seriuos power output as far i can see.
Do you rely only on the magnetism for the hall magnet to stay in place ?
Will the engine power an airplane model or something similiar ?

I am looking foreward to hear it run !

Best regards,
Thomas

Ramon Wilson · « **Reply #34 on:** January 20, 2018, 06:37:53 PM »

Neatly accomplished Jeff - and a nicely machined piston - you have me wavering

Tug

jef · « **Reply #35 on:** January 21, 2018, 08:29:06 PM »

Thanks guys

The power output will be moderate I think , look at the timing photo

The magnet is 4 mm in diameter and pressed in a hole of 3,9 mm , I think it's pretty stuck

I am gonna use the engine on a KeilKraft Falcon that I am building

Regards Jef

Ramon Wilson · « **Reply #36 on:** January 21, 2018, 08:42:11 PM »

Quote from: jef on January 21, 2018, 08:29:06 PM

I am gonna use the engine on a KeilKraft Falcon that I am building

Regards Jef

Now that's going to make a real nice combination Jef - lovely design the Falcon

. Do you have a nice set of inflatable wheels for it?

Years ago I set out to make a Jasco Flamingo - do you know it? Similar size but huge wing area - the larger ribs needed near a sheet of balsa

. I never did finish it but sold it on - to non other than Ron Moulton would you believe (forgive the name dropping but that's just who bought it). He never finished it either - have no idea what happened to it after he passed on.

Regards - Tug

jef · « **Reply #37 on:** January 21, 2018, 09:28:36 PM »

Yes , I got a set of 5" inlfatable balloon tires for it

The plans are on outerzone https://outerzone.co.uk/plan_details.asp?ID=6950

First run off the engine

<a href="https://www.youtube.com/watch?v=uM37c--O9JU" target="_blank">http://www.youtube.com/watch?v=uM37c--O9JU</a>

Regards Jef

Ramon Wilson · « **Reply #38 on:** January 21, 2018, 10:49:38 PM »

Thanks for the link Jef but my building days are well over I fear

That's running really nice - pretty consistent and considering it appears open exhaust not too noisy either. What size prop do you have it on there?

Tug

PS just clicked on your link expecting to see your Falcon - yep, that's the one

Admiral_dk · « **Reply #39 on:** January 22, 2018, 11:07:43 AM »

Great runner Jef

and thank you for the link

jef · « **Reply #40 on:** January 23, 2018, 10:01:33 PM »

Quote from: Ramon on January 21, 2018, 10:49:38 PM

What size prop do you have it on there?

Master Airscrew 14 x 6

Jef

Ramon Wilson · « **Reply #41 on:** January 24, 2018, 07:53:22 AM »

That's a great result Jef - swings that with consummate ease.

Do you have any drawings you'd be prepared to share - I've yet to make a sparkie and that would fit the bill just nicely

Regards - Tug

jef · « **Reply #42 on:** January 24, 2018, 08:20:09 AM »

Quote from: Ramon on January 24, 2018, 07:53:22 AM

Do you have any drawings you'd be prepared to share - I've yet to make a sparkie and that would fit the bill just nicely

No problem , I made some PDF's of the inventor drawings and post them in "Plans & Drawings"

Regards Jef

Ramon Wilson · « **Reply #43 on:** January 24, 2018, 08:53:32 AM »

Thanks Jef - that's a really great way to finish a super build log - well done indeed

Tug

Roger B · « **Reply #44 on:** January 29, 2018, 10:08:51 AM »

Looks and sounds good

Propellers always scare me

AlexS · « **Reply #45 on:** January 29, 2018, 11:43:50 AM »

Jeff what a beautiful piece of craftsmanship. The engine sounds good too.

Do you have plans to later install an expansion exhaust?

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Author Topic: JLE 14cc Petrol airplane engine (Read 9764 times)