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 [2 strokes] V2 90 degree, common crankcase,one carb

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Niels Abildgaard
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Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeSam 2 Mar 2013 - 14:29
Hello
[Vous devez être inscrit et connecté pour voir ce lien]

I am danish and my main claim to fame is having made worlds first and maybe last opposed piston engine with electric synchronisation of cranks.It ran first try.
Another idea that maybe is more usefull is to have a single crank with two conrods and pistons in one crankcase with one carburator.
A much better two stroke Ducati.
Balance is nearly perfect and output torque is very even.
If  the Aprillia 250 had been made that way how much less power would that have given?
Simplicity,building volume and mass would have been better and this will compensate for less power.
I can read french and to some extent italian but will not be able to write it better than Google.
Is there a way describtion of how to put in photos ?

Kind regards


Dernière édition par Niels Abildgaard le Mar 11 Fév 2014 - 18:44, édité 1 fois
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Marc
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Marc


Nombre de messages : 28161
Age : 66
Localisation : Villiers sur Marne (94)
Date d'inscription : 27/05/2008

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeSam 2 Mar 2013 - 16:51
Welcome on board, Niels!

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http://www.pit-lane.biz
Ed

Ed


Nombre de messages : 2551
Age : 61
Localisation : CHALETTE
Date d'inscription : 06/10/2010

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeSam 2 Mar 2013 - 17:04
Velkommen ! [2 strokes] V2 90 degree, common crankcase,one carb 263463
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http://technomoto.blogspot.com/
Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Photos from Denmark   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeSam 2 Mar 2013 - 20:53
I am learning slowly toupload photos
[Vous devez être inscrit et connecté pour voir cette image]
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Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Crosshead Junkers   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeSam 2 Mar 2013 - 21:03
A concept for a two stroke domestic power and heat station[Vous devez être inscrit et connecté pour voir cette image]
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Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: More of same   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeSam 2 Mar 2013 - 21:17
It is working .
I think future motorbikes will be synthetic petrol/electric and I plan to get very rich and famous by suplying all the generator sets.
No nuclear,fuel cells or fourstrokes,but real benzine breathing beast (and with a good efficiency.

[Vous devez être inscrit et connecté pour voir cette image]

The crosshead junkerator picture sent a few minutes ago is really an animation but is probably to big .!.4 MB

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superkart

superkart


Nombre de messages : 2015
Age : 45
Localisation : pres de nogaro
Date d'inscription : 20/01/2010

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeSam 2 Mar 2013 - 21:24
[2 strokes] V2 90 degree, common crankcase,one carb 263463
On va suivre ce topic de pres !
[2 strokes] V2 90 degree, common crankcase,one carb 771973
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Marc
Admin
Marc


Nombre de messages : 28161
Age : 66
Localisation : Villiers sur Marne (94)
Date d'inscription : 27/05/2008

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 3 Mar 2013 - 10:37

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http://www.pit-lane.biz
Pline le nouveau




Nombre de messages : 158
Age : 52
Localisation : TOULOUSE
Date d'inscription : 04/03/2012

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: V2 90 DEGREE ? COMMON CRANKCASE ?   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 3 Mar 2013 - 12:05
[2 strokes] V2 90 degree, common crankcase,one carb 263463 YOUNG MEN ! lol! [2 strokes] V2 90 degree, common crankcase,one carb 998726
Just one question ... Where is the V2 ? And the common crankcase ?
Your motor is real and it s a good thing but it s only two motor assembly with a common head motor , no?
Can you explain the intake and the exhaust and why two differents pistons ?
I don t want be bad with you , it s only strange for me and i want to know how your motors turn like this !
Sorry for my bad english !!
And perhap s i am sleeping too !!! lol! [2 strokes] V2 90 degree, common crankcase,one carb 998726 [2 strokes] V2 90 degree, common crankcase,one carb 584741 [2 strokes] V2 90 degree, common crankcase,one carb 412241
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Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: V2 90 degree   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 3 Mar 2013 - 14:28
Hello Marc and thank You for the animation

Hello Plinius
Junkers engines have one piston controlling inlet and one controlling exhaust.Different forms for different jobs.
To prove that the Junkerator concept, that is an AC generator on each crank ,can function the twin honda thing was tested.
My V2 interest came after reading about the Aprilia 125 story.Frits explains that crankcase pumping is only for starting.The real pumping work is done by the very short and sharp blowdown.
In that case all the funny crankcase combination for two cylinder two strokes from the last 100 years have been superfluous.
A rather late discovery.
Two stroke motorbikes are maybe on hold,but for aircrafts they are a student study worth.
One example is shown [Vous devez être inscrit et connecté pour voir cette image]

Bore 80 ,stroke 120 ,2400 rpm 60 horsepower and less mass and vibration than a Rotax 912

Kind regards
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Frits Overmars

Frits Overmars


Nombre de messages : 2637
Age : 76
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 3 Mar 2013 - 15:01
Niels Abildgaard a écrit:
To prove that the Junkerator concept, that is an AC generator on each crank ,can function the twin honda thing was tested.
Do you mean that there is no mechanical coupling between the two crankshafts of that Honda thing, Niels?
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Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Junkerator   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 3 Mar 2013 - 18:16
Hello Frits

It is not nessecary with mechanical coupling.
I was in the Navy as Young man and can still remember the schock in ship when somebody coupled two AC generators onto same electric system with a too great phase difference.
I never got round to try it but if one stator can be adjusted 5 to 10 degree relative to the other ,during running ,variable compression will be possible.More than 10 degree and I do not think the AC interlocking works.

Kind regards

Niels
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Pline le nouveau




Nombre de messages : 158
Age : 52
Localisation : TOULOUSE
Date d'inscription : 04/03/2012

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: V2 90 DEGREE   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 3 Mar 2013 - 20:16
HELLO MAN !
The twin motor HONDA as the motor of House power supplying with special crankcase ? [2 strokes] V2 90 degree, common crankcase,one carb 771973 or [2 strokes] V2 90 degree, common crankcase,one carb 584741
And so , your motor is like JUNKER S airplane motor , no ? [2 strokes] V2 90 degree, common crankcase,one carb 809262 [2 strokes] V2 90 degree, common crankcase,one carb 980796
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Pline le nouveau




Nombre de messages : 158
Age : 52
Localisation : TOULOUSE
Date d'inscription : 04/03/2012

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: V2 90 DEGREE   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 3 Mar 2013 - 20:25
DETROIT DIESEL pour le V2 inversé et moteur de Marine et de locomotive pour celui à pistons opposés ( les bielles avec les tiges alternatives reliées aux pistons , par contre , de mémoire , je ne me rappelle plus les noms des constructeurs sauf le V2 type GM de l armée US de la WWII , MORSE , MAN ou ....?
PS : je ne comprends pas trés bien ce que vous dites en anglais ...Sorry ! [2 strokes] V2 90 degree, common crankcase,one carb 980796 [2 strokes] V2 90 degree, common crankcase,one carb 412241
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Pline le nouveau




Nombre de messages : 158
Age : 52
Localisation : TOULOUSE
Date d'inscription : 04/03/2012

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: V2 90 DEGREE   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 3 Mar 2013 - 20:35
[2 strokes] V2 90 degree, common crankcase,one carb 241515 [2 strokes] V2 90 degree, common crankcase,one carb 771973 OK !!!! je vois peut etre bien le grand intérét de ce moteur , c est la précompression double entre le piston et le joint de la tige "bielle" rectiligne et ce dernier et la partie inférieure de la tige "bielle" mais où sont les transferts ?
Que fait la police ?! lol! [2 strokes] V2 90 degree, common crankcase,one carb 998726
En tout cas , c est intéressant ; Pensez vous que ce moteur soit plus intéressant en terme de rendement que l OPOPOC
américain ?
Encore mieux ? [2 strokes] V2 90 degree, common crankcase,one carb 980796
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Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Opposed piston engines   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeLun 4 Mar 2013 - 8:12
Hello Pline
Fairbanks Morse are still selling opposed piston engines for making electricity from diesel or natural gas.Construction is from 1935 and the motor is still a high efficiency lowNOx engine.
The V2 aircraft scheme is more inspired by the very efficient marine engines made as crosshead and with one exhaust valve per cylinder.
If someone has a CAD model of a modern 125 cylinder and piston please let me use it for trying to construct the crankcase of an ultra simple V2 and let me compare with the latest 250 from Aprilia.
At my age it is very nice to play smarter than the wise guys and as no new 250 are made for the immidiate future ,nobody will prove me wrong.
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cristogrr

cristogrr


Nombre de messages : 1761
Age : 60
Localisation : sirault belgique
Date d'inscription : 26/04/2010

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeMar 5 Mar 2013 - 18:53
Hello,
the main problem is the accumulation of heat on the pistons (internal parts are difficult to cool) [2 strokes] V2 90 degree, common crankcase,one carb 980796
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Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 9 Fév 2014 - 19:27
I found an old link

[Vous devez être inscrit et connecté pour voir ce lien]

and another with other pictures

[Vous devez être inscrit et connecté pour voir ce lien]

explaining in more details my visions for combustion engines.

At least I have made a crankshaft

[Vous devez être inscrit et connecté pour voir ce lien]
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Pline le nouveau




Nombre de messages : 158
Age : 52
Localisation : TOULOUSE
Date d'inscription : 04/03/2012

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 9 Fév 2014 - 19:42
[2 strokes] V2 90 degree, common crankcase,one carb 771973  BONJOUR ! Où en étes vous de votre projet ? Y a t il un lien avec la technique du V4 Swissauto ?
Avez vous de nouvelles images de votre proto ?  [2 strokes] V2 90 degree, common crankcase,one carb 241515 
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Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 9 Fév 2014 - 19:54
Hello Pline

Excuse me for answering in English.

Thank You for welcoming,and I have made no great progress as wife died recently after long and painfull disease.
I have never heard of the V4 Swiss thing but it is probably 4 separate crank chambers and therefore uninteresting for my line of thougth.I am not thinking V2 aero anymore as the twin airscrew Junkers is much better.

Kind regards

Niels
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GrahamB

GrahamB


Nombre de messages : 3456
Age : 62
Localisation : Lyon
Date d'inscription : 19/08/2011

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeDim 9 Fév 2014 - 21:45
Dear Niels,
My sympathies, inadequate as they are :-(

For the Swissauto V4, it had in fact two crankcases each serving two cylinders. In fact it was a "bent-boxer", in each pair the two pistons reached TDC together, by using offset crankpins. The downside is obvious, two crankpins joined by a web without main-bearing, so the cranks did not last very long.

Frits posted a photo of the crank on the site somewhere...
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Niels Abildgaard




Nombre de messages : 37
Localisation : Denmark
Date d'inscription : 26/02/2013

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeLun 10 Fév 2014 - 8:03
Thank You Graham

It becomes nessecary to try that 90 degree V2 thing I feel,and the cheapest and best way can be to take a MZ  125/150 crank

[Vous devez être inscrit et connecté pour voir cette image]

and have a new/20mm longer wrist pin made.The discs were wildly overdimensioned to act as flywheel.This can leave material enough for proper counterweigthing.
Do You have an idea who could make such a 28 times 69mm wristpin?

[Vous devez être inscrit et connecté pour voir cette image]


Dernière édition par Niels Abildgaard le Mar 11 Fév 2014 - 19:05, édité 2 fois
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Emmanuel Laurentz

Emmanuel Laurentz


Nombre de messages : 5085
Age : 65
Localisation : PACA
Date d'inscription : 07/12/2009

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeLun 10 Fév 2014 - 8:57
[2 strokes] V2 90 degree, common crankcase,one carb 263463 
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cinquante

cinquante


Nombre de messages : 1217
Age : 84
Localisation : Paris
Date d'inscription : 29/09/2012

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeLun 10 Fév 2014 - 10:25
Déjà en français, j'aurais du mal à suivre, alors là, je suis perdu  [2 strokes] V2 90 degree, common crankcase,one carb 412241 

 [2 strokes] V2 90 degree, common crankcase,one carb 263463 
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GrahamB

GrahamB


Nombre de messages : 3456
Age : 62
Localisation : Lyon
Date d'inscription : 19/08/2011

[2 strokes] V2 90 degree, common crankcase,one carb Empty
MessageSujet: Re: [2 strokes] V2 90 degree, common crankcase,one carb   [2 strokes] V2 90 degree, common crankcase,one carb Icon_minitimeLun 10 Fév 2014 - 10:53
Niels Abildgaard a écrit:

Do You have an idea who could make such a 23 times 76mm wristpin?

Sorry Niels, I'm not well connected to manufacturers. I think the special wrist-pins Aprilia used with the ends welded  shut were made by Mahle, but I would guess costs would be high unless you ordered a few hundred.
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[2 strokes] V2 90 degree, common crankcase,one carb Empty
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[2 strokes] V2 90 degree, common crankcase,one carb
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