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Marc
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
EDOUARD Jean
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
philwood
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
Pierre"PhilRead"
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
mickey
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
yves kerlo
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
bubu
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
Fügner
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
Dialmax
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
Jarno
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting16[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting13[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Voting15 
La réclame...
Le deal à ne pas rater :
Jeux, jouets et Lego : le deuxième à -50% (large sélection)
Voir le deal

 

 [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked)

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AuteurMessage
Frits Overmars

Frits Overmars


Nombre de messages : 2613
Age : 75
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Icon_minitimeJeu 14 Oct 2010 - 13:25

Hello everybody,
Please forgive me for writing in english. I can read french, but writing is a different matter... I hope you don't mind. And if one of you would be kind enough to add a french translation, it would make me very happy.
My name is Frits Overmars. I registered on Pit-Lane because Jan Thiel drew my attention to the Rumi-topic. Jan and I have been friends for over 30 years and we worked together on the Rumi 125GP project in 1992 and 1993.
Until Jan retired from Aprilia, I performed thermodynamic and gasdynamic calculations for him, and I also tried to think along with him about various two-stroke developments.

I am glad to have gained access to your forum; I already read a considerable number of threads (and I love the way Eric Offenstadt proves that, although he is a veteran, he still has a rebellious young mind 8) ).

This morning Jan discussed the engine power of Lorenzo's reed-valve Derbi 125, the DRVE (Derbi Rear Valve Engine) that later became known as the Aprilia RSA, and the Aprilia RSW.
I think it would be good to illustrate Jan's story with a power graph of these three engines, so here it is.
I also include some unpublished CT-scans of the RSA cylinder, type APF 2010. They show the exhaust and transfer ducts and the cooling ducts.

Best regards,
Frits Overmars
[Vous devez être inscrit et connecté pour voir cette image]
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pit

pit


Nombre de messages : 156
Age : 48
Localisation : 74150 Rumilly
Date d'inscription : 19/07/2010

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Icon_minitimeJeu 14 Oct 2010 - 13:27

c'est vrais mike le poids [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 614236
je s'est de quoi je parle Embarassed
pour les puissance je pense qu'il faudrait connaitre la puissance a la roue !!!
mais là je pense que c'est tabou !!


mais merci [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 398384 [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 398384
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Frits Overmars

Frits Overmars


Nombre de messages : 2613
Age : 75
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Icon_minitimeJeu 14 Oct 2010 - 13:30

Aprilia RSA ports CT-scan

EDIT: seems I am too stupid to add pictures. HELP!
Wait, I've got an idea. I will mail them to Marc; then he can add them [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 324787
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pit

pit


Nombre de messages : 156
Age : 48
Localisation : 74150 Rumilly
Date d'inscription : 19/07/2010

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Icon_minitimeJeu 14 Oct 2010 - 13:40

vite marc mais les photos [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 241515
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Toop




Nombre de messages : 3900
Age : 17
Localisation : Tours
Date d'inscription : 02/01/2010

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Icon_minitimeJeu 14 Oct 2010 - 13:43

Merci de votre participation Frits Overmars [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 241515

et soyez le bienvenu [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 263463
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pit

pit


Nombre de messages : 156
Age : 48
Localisation : 74150 Rumilly
Date d'inscription : 19/07/2010

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Icon_minitimeJeu 14 Oct 2010 - 13:46

Embarassed Embarassed désoler merci Frits Overmars il a raison toopack bienvenue !
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janpol84

janpol84


Nombre de messages : 6605
Age : 72
Localisation : 84
Date d'inscription : 09/08/2009

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Icon_minitimeJeu 14 Oct 2010 - 13:48

Frits Overmars a écrit:
Hello everybody,
...
....and I love the way Eric Offenstadt proves that, although he is a veteran, he still has a rebellious young mind 8)
...

a rebellous young mind

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 241515 [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 241515 [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 241515 [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 241515
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 771973
[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 998726
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Seb4LO

Seb4LO


Nombre de messages : 2607
Localisation : Concarneau
Date d'inscription : 05/07/2009

[GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Empty
MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked)   [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 Icon_minitimeJeu 14 Oct 2010 - 14:21

Frits Overmars a écrit:
Bonjour à tous ,
Tout d'abord pardonnez moi pour mon écriture en anglais , j'arrive à lire le francais mais l'écriture est plus problématique J'espère que vous ne m'en voudrez pas .
Si quelqu'un souhaite traduire en français mes propos ne vous gênez pas , j'en serai tès content

Mon nom est donc Frits Overmars. Je me suis enregistre sur Pit-Lane puisque Jan Thiel m'a écrit quelques mots concernant le topic Rumi. Jan et moi sommes amis depuis plus de 30 ans et nous avons travaillés ensemble sur le projet Rumi 125GP en 1992 et 1993.
Jusqu'à ce que Jan se retire d'Aprilia, je travaillais sur la thermodynamique et mes calculs de flux gazeux pour lui , et nous avons aussi travaillé sur d'autres projets/voies de développement du deux temps .
Je suis content d'avoir accès à votre forum ; j'ai déjà lu un nombre important de topics (et j'adore la manière qu' Eric Offenstadt a de prouver que , malgrés son age qui pourrait le classer dans les "vétérans " il pense toujours comme un jeune rebel 8) ).

Ce matin Jan évoquait le moteur de Derby à clapets de Lorenzo , ainsi que me DRVE (Derbi Rear Valve Engine) qui plus tard furent appelés l'Aprilia RSA, et l'Aprilia RSW.
j'ai pensé qu'i serait bon d'illustrer les propos de Jan avec quelques graphiques de passage au banc de ces trois moteur , voici donc chose faite .
J'inclus aussi des CT-scans non publiés du cylindre RSA cylinder, type APF 2010. Ils montrent les transferts ; l'échappement et le circuit de refroidissement .

Best regards,
Frits Overmars Traduction Seb4lo
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first of all , welcome Mr Overmars , i'm glad to see you here !
i'll try to translate your posts in french for the non-english guys here

Anyway , there is an issue with the link for the the ducts datas ....


Dernière édition par SEB4LO le Jeu 14 Oct 2010 - 18:30, édité 2 fois
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Frits Overmars

Frits Overmars


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Merci, SEB
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Jarno

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Frits Overmars a écrit:

This morning Jan discussed the engine power of Lorenzo's reed-valve Derbi 125, the DRVE (Derbi Rear Valve Engine) that later became known as the Aprilia RSA, and the Aprilia RSW.
I think it would be good to illustrate Jan's story with a power graph of these three engines, so here it is.
I also include some unpublished CT-scans of the RSA cylinder, type APF 2010. They show the exhaust and transfer ducts and the cooling ducts.

Best regards,
Frits Overmars
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Thank you very much for this outstanding contribution Frits !

However, I am a bit confused :
The Derbi Reed Valve Engine is the one ridden by Lorenzo and which output is 47.6BHP as explained to me by Jan and as shown in the graph you posted.

I believe it's by mistake that you mentioned this engine as having become Aprilia RSA.
As far as I understand, the Jan Thiel-designed Derbi engine was not a valve engine.

If I missed something, please let me know.

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Frits Overmars

Frits Overmars


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Hello Jarno,

I wrote about three different engines:
Lorenzo's reed-valve Derbi 125 (this is the first one), the DRVE (Derbi Rear Valve Engine) that later became known as the Aprilia RSA (this is the second one), and the Aprilia RSW.
To avoid confusion, you can also imagine that DRVE stands for Derbi Rotary Valve Engine.
Rear Valve was used to distinguish it from the side-mounted rotary valve of the Aprilia RSW.
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Jarno

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Thank you Frits, I knew I was missing something :)

Embarassed
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Marc
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Marc


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Voici les images du cylindre RSA, type APF 2010, très gentiment envoyées par Frits!

Thanks so much, Frits!

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Dernière édition par Marc le Ven 15 Oct 2010 - 2:03, édité 2 fois
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Seb4LO

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Emmanuel Laurentz

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merci encore pour tout ces éclairages sur l'histoire de ces hommes et de leur réalisations, un simple
régale, après une simple journée de de travail, [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 1) (Locked) - Page 11 980796
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Team MLR

Team MLR


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c'est vrai que des boosters aussi gros c'est du siliconé c'est obligé!!!
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http://alerion-gp.fr
zeze




Nombre de messages : 253
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Vraiment ce forum est une mine d'or aussi bien pour les contributeurs que les infos de premieres ordre postees Merci a Marc ,Jan,Arno,et au traducteur 4lo .Gros respect et admiration a Pepe le setois et un suporter de plus pour le projet Zeze
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2stroke

2stroke


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Je suis vraiment impressionné par la gentillesse de messieurs Thiel et Overmars.
Donner des informations aussi précises que rares, alors que jusqu'à présent tout le monde ne faisait que des approximations, est effectivement admirable.

Merci et respect à tous!

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pierre

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Seb4LO

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Frits Overmars a écrit:
Bonjour Jarno,

J'évoquais trois moteurs différents , en effet :
Celui de Lorenzo's avec clapets , le Derbi 125 (le plus ancien), le DRVE (Derbi Rear Valve Engine) le dernier né ( celui de bautista ) Aprilia RSA (donc le deuxième), et l'Aprilia RSW.
Pour éviter toute confusion, on peut symboliser DRVE par Derbi Rotary Valve Engine.
Rear Valve pour différencier de celui à disque latéral de l'Aprilia RSW.
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Jarno

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Frits Overmars a écrit:
Hello Jarno,

I wrote about three different engines:
Lorenzo's reed-valve Derbi 125 (this is the first one), the DRVE (Derbi Rear Valve Engine) that later became known as the Aprilia RSA (this is the second one), and the Aprilia RSW.
To avoid confusion, you can also imagine that DRVE stands for Derbi Rotary Valve Engine.
Rear Valve was used to distinguish it from the side-mounted rotary valve of the Aprilia RSW.


Bon comme vous l'aurez compris, j'avais lu trop vite et confondu "rear valve" avec "reed valve"... Embarassed

Il y avait donc bien :
- le moteur Derbi à clapets d'avant Jan Thiel, sortant au mieux 47,6 chevaux,
- le moteur Derbi de Jan Thiel, à disque rotatif placé à l'arrière du cylindre, appelé initialement DRVE (Derbi Rear Valve Engine) puis rebaptisé RSA une fois le service course Derbi dissous par Piaggio et fusionné avec le service course Aprilia,
- le moteur Aprilia à disque rotatif latéral, dénommé RSW, fer de lance Aprilia mais rapidement éclipsé par le RSA au grand dam des ingénieurs Apriia...

Je trouve le graphe très intéressant parce qu'il souligne que l'avantage du RSA de Jan Thiel-Derbi sur le RSW d'Aprilia n'est pas tant la puissance maxi (54 contre 53,9) mais la courbe, nettement plus remplie sur le RSA entre 10000 et 12000 tours, d'où certainement un gain conséquent en sortie de virage.

Merci Frits pour ces compléments d'info exceptionnels
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fpayart

fpayart


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Jarno a écrit:
Le disque rotatif est entraîné par pignons et courroie depuis l'arbre d'équilibrage

Curieux l'entraînement mixte courroie + pignons, à l'occasion pourrais-tu vérifier l'info?
La grosse différence entre les courbes RSW et RSA est également entre 11600 et 14500 t/mn. Si l'on compare la surface comprise entre les deux courbes on s'aperçoit que la RSA est nettement plus efficace autour de la puissance maxi sans compter "l'allonge" du moteur qui est plus importante même après 14000, d'où une meilleure vitesse de pointe. En contrepartie, probablement un moteur un peu plus difficile à exploiter, ce qui expliquerait les difficultés d'adaptations de certains pilotes.


Dernière édition par fpayart le Ven 15 Oct 2010 - 10:03, édité 1 fois
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Jarno

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fpayart a écrit:
Jarno a écrit:
Le disque rotatif est entraîné par pignons et courroie depuis l'arbre d'équilibrage

Curieux l'entraînement mixte courroie + pignons, à l'occasion pourrais-tu vérifier l'info?

Vérification faite j'ai traduit trop vite, merci FP.
Jan m'a dit "bevel gear" et non "belt + gear"
Je rectifie tout de suite

Décidément, les Italiens ont raison de dire "traduttore - traditore"
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Seb4LO

Seb4LO


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c'est pas le moteur francis , il a plus de couple et une plage plus large , forcément " plus facile " , sur les RSA , le truc qui fache semble être le chassis Wink ( peut être des réglages moteurs plus pointus aussi mais bien règlé , il est plus facile , c'est certain )

Merci Jarno , ca me travaillait cette histoire de courroie , je n'arrivais pas à comprendre ou elle pouvait être Wink
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superkart

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Jarno a écrit:
[
- le moteur Aprilia à disque rotatif latéral, dénommé RSW, fer de lance Aprilia mais rapidement éclipsé par le RSA au grand dam des ingénieurs Apriia...


enfin, ce moteur RSW .. il a ete utilise pendant...presque 20ans .. pas mal non...
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