Turbin Arus? knapa tidak!!!

Banyak sumberdaya alam yang bisa digunakan untuk membantu kelangsungan hidup manusia... sekarang kebutuhan yang paling banyak dipakai adalah dengan menggunakan bahan bakar fosil... trus bagaimana dengan bahan bakar alternatif yang tidak merusak lingkungan serta bisa didapat secara gratis dalam jumlah yang besar?? kelihatannya masih belum mengalami perkembangan yang pesat.....

Mungkin yang kita tau ada seperti Turbin angin, Solar cell, dan lain sebagainya...
nah ada satu lagi yang sering kita lupakan yaitu arus.... what? arus??

Yap arus... yang jelas bukan arus uang, arus pergaulan maupun arus lainnya yg tidak ada kaitannya dengan obrolan ini... hehehe

Arus air bisa ditemukan di berbagai tempat yang memiliki aliran air... intinya adalah ada hulu dan ada hilir... sebagaimana kita tahu bahwa aliran memiliki gaya potensial yang menyebabkan aliran turun dari tinggi kerendah...

tahu parit depan rumah? gak tau?? klo Got depan rumah?? masih gak tau?? klo sungai?? Laut deh laut!!!.... klo masih gak tau ya kelaut aja ya.. hahaha

ada perkembangan besar yaitu mengembangkan teknologi turbin arus untuk menghasilkan listrik yang ramah lingkungan.... rasanya kalau dilihat pernah dari turbin air buat numbuk padi untuk masyarakat desa dan dipakai untuk hal yang bermacam macam...
nah gmana kalo turbinnya dengan ukuran jumbo dan untuk menghidupkan sebuah gedung?? itu baru keren...

Klo di Skotlandia ada perusahaan pernama Scottish Power Renewable yang bekerja memasang Turbin raksasa didalam laut lepas pantai skotlandia. Bisa menghasilkan daya sebesar 10 megawatt.. wow.. gede boss!!!

Perlu diketahui Potensi Laut sangat besar dan mampu memenuhi kebutuhan energi yang ada...
Prinsip dasarnya adalah arus memiliki potensi energi kinetik yang dapat dikonversi menjadi listrik melalui putaran yang terjadi pada baling baling sehingga memutar generator dan menghasilkan listrik... ya mirip sama turbin angin lhaa.... 
gmana kelanjutannya... moga makin berkembang dan jd andalan energi pengganti fosil...

Final MotoGP Valencian GP with Dramatic Race

The race was declared wet by Race Direction despite a near dry line having formed, and only Yamaha Factory Racing’s Jorge Lorenzo, his teammate Nakasuga, and LCR Honda MotoGP’s Stefan Bradl, chose the softer option slick tyres, with all others on the hard wets. However, in a twist unseen this season, Pedrosa, Ducati Team’s Nicky Hayden, Monster Yamaha Tech 3’s Cal Crutchlow and San Carlo Honda Gresini’s Álvaro Bautista then decided to start from pit-lane after their sighting lap, with all of them switching to a bike with slick tyres.

As the race got underway it was Power Electronics Aspar’s Aleix Espargaró who was leading the early exchanges, yet within three laps Lorenzo’s choice looked the better one as he was started to lap significantly quicker than the rest. Pedrosa was carving his way through the pack, whilst many riders that were on wets started coming into the pits to switch to their bikes with slicks, amongst which were Repsol Honda’s Casey Stoner, Pramac Racing Team’s Héctor Barberá, and Tech 3’s Andrea Dovizioso.

Amid the frantic happenings, Hayden, Avintia Blusens’ Iván Silva, and Speed Master’s Roberto Rolfo crashed out of contention. On lap eight, Lorenzo was leading with Pedrosa in tow, whilst Bradl was running third with Nakasuga and Crutchlow behind. It was however not to be for the young German as he lost control of his bike in Turn 5 and crashed out. With 18 laps remaining Crutchlow efforts were rewarded by getting past Nakasuga, as Pedrosa had a moment and ran wide, putting him over three seconds back on Lorenzo.

Then there was huge drama as the World Champion was highsided off his bike as he was passing back markers, and was fortunate to walk away unhurt. This left Pedrosa in the lead, who also had his work cut out getting past the slower riders. On lap 19 the crashes continued as Barberá also took a tumble, whilst Espargaró’s teammate Randy de Puniet ran into the gravel. A lap later he was followed Avintia Blusens’ Claudio Corti, who skidded off into the gravel on his Inmotec chassis.
Just as things looked to have settled down, Crutchlow was caught out by the conditions and dropped out of second place. This moved Bautista up into third, although Stoner was catching up quickly in fourth. And with three laps remaining Stoner was all over the rear wheel Bautista and caught him at the end of the lap down the home straight to move into third.

In the end it was Pedrosa who took chequered flag to score his seventh win of the season, with Nakasuga taking the first Japanese podium this year in his second wildcard entry, and Stoner signing off his GP career with the final step on the rostrum. The first non-podium finisher was Bautista, followed by his teammate Michele Pirro, Dovizioso, Cardion AB Racing’s Karel Abraham, Came IodaRacing Project’s Danilo Petrucci, Paul Bird Motorsport’s James Ellison and Ducati’s Valentino Rossi. Espargaró finished in 11^th and secured himself the CRT title this season, whilst Bautista consolidated fifth in the championship.

Source:  http://www.motogp.com/en/news/2012/spain+valencia+motogp+race+pedrosa

MotoGP Valencia Seri Penutup Penuh Drama

Yes seri penutup MotoGp seri ini memang penuh drama... mulai dari rider rider yang mengganti motor sampai rider yang pada ndlozorrr dengan sukses.... 

start dari Pit Pedrosa, Hayden, Bautista dan Crutchlow yang ban belakangnya goyang kanan kiri ala gangnam style....

akhirnya Pedrosa memenangi seri ini dan diikuti oleh test rider yamaha Nakasuga dan stoner yang akan pensiun... selamat buat pada rider....

Cheste, Sunday, November 11, 2012

Pos.	Points	Num.	Rider	Nation	Team	Bike	Km/h	Time/Gap
1	25	26	Dani PEDROSA	SPA	Repsol Honda Team	Honda	149.0	48'23.819
2	20	21	Katsuyuki NAKASUGA	JPN	Yamaha Factory Racing	Yamaha	147.0	+37.661
3	16	1	Casey STONER	AUS	Repsol Honda Team	Honda	145.9	+1'00.633
4	13	19	Alvaro BAUTISTA	SPA	San Carlo Honda Gresini	Honda	145.8	+1'02.811
5	11	51	Michele PIRRO	ITA	San Carlo Honda Gresini	FTR	144.6	+1'26.608
6	10	4	Andrea DOVIZIOSO	ITA	Monster Yamaha Tech 3	Yamaha	144.5	+1'30.423
7	9	17	Karel ABRAHAM	CZE	Cardion AB Motoracing	Ducati	144.4	+1'31.789
8	8	9	Danilo PETRUCCI	ITA	Came IodaRacing Project	Ioda-Suter	143.5	1 Lap
9	7	77	James ELLISON	GBR	Paul Bird Motorsport	ART	143.1	1 Lap
10	6	46	Valentino ROSSI	ITA	Ducati Team	Ducati	142.9	1 Lap
11	5	41	Aleix ESPARGARO	SPA	Power Electronics Aspar	ART	141.1	1 Lap
12	4	14	Randy DE PUNIET	FRA	Power Electronics Aspar	ART	138.3	2 Laps
13	3	73	Hiroshi AOYAMA	JPN	Avintia Blusens	BQR	136.7	2 Laps
14	2	5	Colin EDWARDS	USA	NGM Mobile Forward Racing	Suter	132.6	3 Laps
Not Classified
		35	Cal CRUTCHLOW	GBR	Monster Yamaha Tech 3	Yamaha	146.7	8 Laps
		71	Claudio CORTI	ITA	Avintia Blusens	Inmotec	130.0	13 Laps
		8	Hector BARBERA	SPA	Pramac Racing Team	Ducati	134.5	14 Laps
		99	Jorge LORENZO	SPA	Yamaha Factory Racing	Yamaha	146.6	17 Laps
		6	Stefan BRADL	GER	LCR Honda MotoGP	Honda	141.8	21 Laps
		84	Roberto ROLFO	ITA	Speed Master	ART	128.3	24 Laps
		22	Ivan SILVA	SPA	Avintia Blusens	BQR	126.9	28 Laps
		69	Nicky HAYDEN	USA	Ducati Team	Ducati	126.9	28 Laps

Weather Conditions:

  |   Track Condition: Wet|   Air: 13º| Humidity: 81%|   Ground: 15º

Records:

Pole Lap:		Dani PEDROSA	1'30.844	158.7 Km/h
Fastest Lap:	Lap: 12	Dani PEDROSA	1'33.119	154.8 Km/h
Circuit Record Lap:	2008	Casey STONER	1'32.582	155.7 Km/h
Best Lap:	2012	Dani PEDROSA	1'30.844	158.7 Km/h

MOTO 2 : agresif... Marques juara

yes balapan Moto 2 ditutup oleh Marques dengan spektakuler... start dari posisi terbelakang tidak membuat rider ini kesulitan untuk menjadi yg terdepan... dalam 14 tikungan sanggup berada diposisi ke 11 dari posisi terbelakang... fantastis

Kabar Topan?? dia finish diposisi paling buntut....

Cheste, Sunday, November 11, 2012

Pos.	Points	Num.	Rider	Nation	Team	Bike	Km/h	Time/Gap
1	25	93	Marc MARQUEZ	SPA	Team Catalunya Caixa Repsol	Suter	132.8	48'50.706
2	20	60	Julian SIMON	SPA	Blusens Avintia	Suter	132.8	+1.256
3	16	18	Nicolas TEROL	SPA	Mapfre Aspar Team Moto2	Suter	132.3	+11.372
4	13	12	Thomas LUTHI	SWI	Interwetten-Paddock	Suter	132.2	+13.006
5	11	77	Dominique AEGERTER	SWI	Technomag-CIP	Suter	132.2	+13.825
6	10	81	Jordi TORRES	SPA	Mapfre Aspar Team Moto2	Suter	131.6	+27.911
7	9	36	Mika KALLIO	FIN	Marc VDS Racing Team	Kalex	131.2	+36.338
8	8	40	Pol ESPARGARO	SPA	Tuenti Movil HP 40	Kalex	131.1	+38.335
9	7	24	Toni ELIAS	SPA	Italtrans Racing Team	Kalex	131.1	+39.419
10	6	80	Esteve RABAT	SPA	Tuenti Movil HP 40	Kalex	131.1	+39.476
11	5	29	Andrea IANNONE	ITA	Speed Master	Speed Up	131.0	+40.207
12	4	8	Gino REA	GBR	Federal Oil Gresini Moto2	Suter	131.0	+41.197
13	3	17	Dani RIVAS	SPA	TSR Galicia School	Kalex	131.0	+41.768
14	2	72	Yuki TAKAHASHI	JPN	NGM Mobile Forward Racing	FTR	131.0	+41.943
15	1	88	Ricard CARDUS	SPA	Arguiñano Racing Team	AJR	130.9	+42.303
16		38	Bradley SMITH	GBR	Tech 3 Racing	Tech 3	130.9	+43.064
17		3	Simone CORSI	ITA	Came IodaRacing Project	FTR	130.6	+49.970
18		75	Tomoyoshi KOYAMA	JPN	Technomag-CIP	Suter	130.5	+51.639
19		4	Randy KRUMMENACHER	SWI	GP Team Switzerland	Kalex	130.5	+53.198
20		49	Axel PONS	SPA	Tuenti Movil HP 40	Kalex	130.4	+54.632
21		23	Marcel SCHROTTER	GER	Desguaces La Torre SAG	Bimota	130.3	+56.401
22		45	Scott REDDING	GBR	Marc VDS Racing Team	Kalex	130.3	+56.974
23		22	Alessandro ANDREOZZI	ITA	S/Master Speed Up	Speed Up	130.2	+59.679
24		14	Ratthapark WILAIROT	THA	Thai Honda PTT Gresini Moto2	Suter	129.5	+1'16.201
25		54	Mattia PASINI	ITA	NGM Mobile Forward Racing	FTR	129.5	+1'16.352
26		28	Roman RAMOS	SPA	SAG Team	FTR	129.4	+1'18.354
27		19	Xavier SIMEON	BEL	Tech 3 Racing	Tech 3	129.0	+1'26.234
28		63	Mike DI MEGLIO	FRA	Kiefer Racing	Kalex	128.9	+1'29.530
29		57	Eric GRANADO	BRA	JIR Moto2	Motobi	125.6	1 Lap
30		97	Rafid Topan SUCIPTO	INA	QMMF Racing Team	Speed Up	120.2	2 Laps
Not Classified
		82	Elena ROSELL	SPA	QMMF Racing Team	Speed Up	127.3	10 Laps
		30	Takaaki NAKAGAMI	JPN	Italtrans Racing Team	Kalex	125.3	13 Laps
		5	Johann ZARCO	FRA	JIR Moto2	Motobi	130.5	17 Laps

OverStroke/UnderSquare Engine

Menyambung artikel sebelumnya yang membahas mengenai OverBore.... kali ini pembahasannya adalah mengenai OverStroke/UnderSquare Engine.... nah gaman teknisnya dan karakteristiknya??

Mesin jenis ini memiliki stroke yang lebih panjang dibandingkan dengan ukuran diameter bore piston/torak.. 

mesin dengan overstroke memiliki karakteristik yaitu minimnya kerugian kalor hasil pembakaran sehingga bisa mendorong piston/torak secara optimal dari panas karena strokenya panjang, tetapi memiliki gesekan yang tinggi karena stroke yang panjang dan dibutuhkan kecepatan piston/torak yang lebih tinggi.

Keuntungan mesin OverStroke adalah Torsi besar yang berada pada RPM rendah sampai RPM menengah... cocok untuk dipakai pada kendaraan perkotaan yang notabene pasti stop n gooo!!!