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	<title>CR21 &#8211; RCRevolution.net</title>
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		<title>ProTek RC &#8211; CR21 3-Ports .21 Off Road Engine</title>
		<link>https://www.rcrevolution.net/protek-rc-cr21-3-ports-21-off-road-engine/</link>
					<comments>https://www.rcrevolution.net/protek-rc-cr21-3-ports-21-off-road-engine/#respond</comments>
		
		<dc:creator><![CDATA[Gigi]]></dc:creator>
		<pubDate>Wed, 21 Sep 2022 20:53:49 +0000</pubDate>
				<category><![CDATA[Miscele]]></category>
		<category><![CDATA[AMain Hobbies]]></category>
		<category><![CDATA[CR21]]></category>
		<category><![CDATA[ProTek RC]]></category>
		<guid isPermaLink="false">https://www.rcrevolution.net/?p=24939</guid>

					<description><![CDATA[ProTek RC ha presentato il motore CR21 a 3 porte .21, un&#8217;ottima scelta per qualsiasi pilota di club attento al budget che cerca un motore nitro .21 ispirato alle prestazioni.&#160;Con un albero motore di nuova concezione e un pistone leggero, [&#8230;]]]></description>
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<p>ProTek RC ha presentato il motore CR21 a 3 porte .21, un&#8217;ottima scelta per qualsiasi pilota di club attento al budget che cerca un motore nitro .21 ispirato alle prestazioni.&nbsp;Con un albero motore di nuova concezione e un pistone leggero, il CR21 è in grado di fornire una potenza fluida e una risposta sincera del motore.&nbsp;Il CR21 ha lo stesso alesaggio e corsa dei famosi motori <a href="https://www.rcrevolution.net/protek-rc-samurai-rm-maifield-edition-off-road-engine/" data-type="URL" data-id="https://www.rcrevolution.net/protek-rc-samurai-rm-maifield-edition-off-road-engine/" target="_blank" rel="noreferrer noopener">ProTek Samurai</a>, garantendo le massime prestazioni.&nbsp;Queste caratteristiche e molto altro rendono questo motore capace di estrema affidabilità e prestazioni senza spendere troppo.</p>



<p>Il motore nitro CR21 utilizza una testa di raffreddamento a 9 alette per mantenere temperature di esercizio ottimali e fornendo anche un aspetto estetico molto gradevole.&nbsp;La camera di combustione è progettata per promuovere gamme di giri medio-bassi, perfetta per le corse di club, pur offrendo prestazioni elevate ad alti regimi.&nbsp;Internamente, il motore utilizza una biella smussata &#8220;Knife-Edge&#8221; che riduce la massa alternata e aumenta il regime di picco.&nbsp;Il carburatore J3-1 consente una regolazione precisa tramite i tre spilli regolabili.&nbsp;Sono inclusi nella confezione due inserti Venturi per carburatore (6 mm arancione e 7 mm giallo). Ulteriori informazioni <a rel="noreferrer noopener" href="https://www.amainhobbies.com/protek-rc-cr21-3port-.21-offroad-engine-turbo-plug-ptk-2670/p1407302?fbclid=IwAR0ciMRA5MkLw3bqzICfqDdOYeOohRkIZsS7yihYcdpvC876SRbloHdsSHk" data-type="URL" data-id="https://www.amainhobbies.com/protek-rc-cr21-3port-.21-offroad-engine-turbo-plug-ptk-2670/p1407302?fbclid=IwAR0ciMRA5MkLw3bqzICfqDdOYeOohRkIZsS7yihYcdpvC876SRbloHdsSHk" target="_blank">QUI</a>.</p>



<p><strong>Specifications</strong>:</p>



<ul class="wp-block-list"><li><strong>Displacement:</strong>&nbsp;.21ci (3.49cc)</li><li><strong>Recommended Application:</strong>&nbsp;1/8 Off-Road</li><li><strong>Bore:</strong>&nbsp;0.641in (16.27mm)</li><li><strong>Stroke:</strong>&nbsp;0.661in (16.80mm)</li><li><strong>Output:</strong>&nbsp;2.41hp @ 33,000RPM (2.45ps)</li><li><strong>Porting:</strong><ul><li><strong>Intake:</strong>&nbsp;2</li><li><strong>Exhaust:</strong>&nbsp;1</li></ul></li><li><strong>Practical RPM Range:</strong>&nbsp;4,000-40,000</li><li><strong>Weight:</strong>&nbsp;13.43oz (381g)</li></ul>



<p><strong>Recommended Exhaust:</strong></p>



<ul class="wp-block-list"><li><strong>PTK-2060:</strong>&nbsp;ProTek R/C 2060 Tuned Pipe w/Manifold (<strong>PTK-2060-1</strong>: pipe only)</li><li><strong>PTK-2090:</strong>&nbsp;ProTek R/C 2090 Tuned Pipe w/Manifold (<strong>PTK-2090-1</strong>: pipe only)</li></ul>



<p><strong>Recommended Glowplug:</strong></p>



<ul class="wp-block-list"><li>PTK-2542: ProTek R/C P3 Turbo Glow Plug (Ultra Hot)</li></ul>



<p><strong>Includes:</strong></p>



<ul class="wp-block-list"><li>(1) CR21 3-Port .21 Off-Road Engine</li><li>(1) P3 &#8220;Glow Plug Turbo Glow Plug &#8220;Ultra Hot&#8221;</li><li>(1) Exhaust Gasket</li><li>(1) 7mm Venturi</li><li>(1) 6mm Venturi</li></ul>



<figure class="wp-block-gallery has-nested-images columns-1 is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex">
<figure class="wp-block-image size-large"><img fetchpriority="high" decoding="async" width="1024" height="819" data-id="24943" src="https://www.rcrevolution.net/wp-content/uploads/2022/09/ProTek-RC-CR21-3-Port-.21-Off-Road-2-1024x819.jpg" alt="" class="wp-image-24943"/></figure>



<figure class="wp-block-image size-large"><img decoding="async" width="1024" height="819" data-id="24944" src="https://www.rcrevolution.net/wp-content/uploads/2022/09/ProTek-RC-CR21-3-Port-.21-Off-Road-3-1024x819.jpg" alt="" class="wp-image-24944"/></figure>



<figure class="wp-block-image size-large"><img decoding="async" width="1024" height="819" data-id="24942" src="https://www.rcrevolution.net/wp-content/uploads/2022/09/ProTek-RC-CR21-3-Port-.21-Off-Road-4-1024x819.jpg" alt="" class="wp-image-24942"/></figure>



<figure class="wp-block-image size-large"><img decoding="async" width="1024" height="819" data-id="24946" src="https://www.rcrevolution.net/wp-content/uploads/2022/09/ProTek-RC-CR21-3-Port-.21-Off-Road-5-1024x819.jpg" alt="" class="wp-image-24946"/></figure>



<figure class="wp-block-image size-large"><img decoding="async" width="1024" height="819" data-id="24945" src="https://www.rcrevolution.net/wp-content/uploads/2022/09/ProTek-RC-CR21-3-Port-.21-Off-Road-6-1024x819.jpg" alt="" class="wp-image-24945"/></figure>



<figure class="wp-block-image size-large"><img decoding="async" width="1024" height="819" data-id="24947" src="https://www.rcrevolution.net/wp-content/uploads/2022/09/ProTek-RC-CR21-3-Port-.21-Off-Road-7-1024x819.jpg" alt="" class="wp-image-24947"/></figure>
</figure>



<p>Fonte:&nbsp;<a href="https://www.amainhobbies.com/" target="_blank" rel="noreferrer noopener">www.amainhobbies.com</a></p>



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