X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp18.bis.na.blackberry.com ([216.9.248.60] verified) by logan.com (CommuniGate Pro SMTP 5.3.6) with ESMTP id 4249979 for flyrotary@lancaironline.net; Thu, 06 May 2010 11:57:04 -0400 Received-SPF: pass receiver=logan.com; client-ip=216.9.248.60; envelope-from=SRS0=Aei/bL=MP=aol.com=wrjjrs@srs.bis.na.blackberry.com Received: from bda2271.bisx.prod.on.blackberry (bda2271.bisx.prod.on.blackberry [172.20.205.106]) by srs.bis.na.blackberry.com (8.13.7 TEAMON/8.13.7) with ESMTP id o46F5vqC003714 for flyrotary@lancaironline.net; Thu, 6 May 2010 15:56:26 GMT X-rim-org-msg-ref-id: 573528630 Message-ID: <573528630-1273161386-cardhu_decombobulator_blackberry.rim.net-1256388718-@bda2271.bisx.prod.on.blackberry> Reply-To: wrjjrs@aol.com X-Priority: Normal References: In-Reply-To: Sensitivity: Normal Importance: Normal Subject: Re: [FlyRotary] Gravity Feed To: "Rotary motors in aircraft" From: wrjjrs@aol.com Date: Thu, 6 May 2010 15:56:26 +0000 Content-Type: multipart/alternative; boundary="part17710-boundary-78052072-1648098726" MIME-Version: 1.0 --part17710-boundary-78052072-1648098726 Content-Type: text/plain; charset="Windows-1252" Todd, High wing or low wing? The key is if you have a high wing there is at least a minimum pressure available. Anything aerobatic or low wing will need pumps. Bill Jepson Sent from my Verizon Wireless BlackBerry -----Original Message----- From: "Todd Archer" Date: Wed, 5 May 2010 18:52:47 To: Rotary motors in aircraft Subject: [FlyRotary] Gravity Feed Anyone who knows feel free to explain to me why a Marvel-Schebler updraft can feed 300 hp with gravity but pumps are needed for Webers or Holleys. I understand the updraft gets another 18" of pressure but am assuming it is simply by design that the response is improved with a few lbs of pressure. Since we aren't too worried about throttle response as long as it doesn't stumble, would a gravity-fed Holley be a waste of time? Todd --part17710-boundary-78052072-1648098726 Content-Transfer-Encoding: base64 Content-Type: text/html; charset="Windows-1252" PGh0bWw+DQoNCjxoZWFkPg0KPE1FVEEgSFRUUC1FUVVJVj0iQ29udGVudC1UeXBlIiBDT05URU5U PSJ0ZXh0L2h0bWw7IGNoYXJzZXQ9dXMtYXNjaWkiPg0KDQoNCjxtZXRhIG5hbWU9R2VuZXJhdG9y IGNvbnRlbnQ9Ik1pY3Jvc29mdCBXb3JkIDEwIChmaWx0ZXJlZCkiPg0KDQo8c3R5bGU+DQo8IS0t DQogLyogU3R5bGUgRGVmaW5pdGlvbnMgKi8NCiBwLk1zb05vcm1hbCwgbGkuTXNvTm9ybWFsLCBk aXYuTXNvTm9ybWFsDQoJe21hcmdpbjowaW47DQoJbWFyZ2luLWJvdHRvbTouMDAwMXB0Ow0KCWZv bnQtc2l6ZToxMi4wcHQ7DQoJZm9udC1mYW1pbHk6IlRpbWVzIE5ldyBSb21hbiI7fQ0KYTpsaW5r LCBzcGFuLk1zb0h5cGVybGluaw0KCXtjb2xvcjpibHVlOw0KCXRleHQtZGVjb3JhdGlvbjp1bmRl cmxpbmU7fQ0KYTp2aXNpdGVkLCBzcGFuLk1zb0h5cGVybGlua0ZvbGxvd2VkDQoJe2NvbG9yOmJs dWU7DQoJdGV4dC1kZWNvcmF0aW9uOnVuZGVybGluZTt9DQpzcGFuLkVtYWlsU3R5bGUxNw0KCXtm b250LWZhbWlseToiVGltZXMgTmV3IFJvbWFuIjsNCgljb2xvcjp3aW5kb3d0ZXh0Ow0KCWZvbnQt d2VpZ2h0Om5vcm1hbDsNCglmb250LXN0eWxlOm5vcm1hbDsNCgl0ZXh0LWRlY29yYXRpb246bm9u ZSBub25lO30NCkBwYWdlIFNlY3Rpb24xDQoJe3NpemU6OC41aW4gMTEuMGluOw0KCW1hcmdpbjox LjBpbiAxLjI1aW4gMS4waW4gMS4yNWluO30NCmRpdi5TZWN0aW9uMQ0KCXtwYWdlOlNlY3Rpb24x O30NCi0tPg0KPC9zdHlsZT4NCg0KPC9oZWFkPg0KDQo8Ym9keSBsYW5nPUVOLVVTIGxpbms9Ymx1 ZSB2bGluaz1ibHVlPlRvZGQsPGJyLz5IaWdoIHdpbmcgb3IgbG93IHdpbmc/IFRoZSBrZXkgaXMg aWYgeW91IGhhdmUgYSBoaWdoIHdpbmcgdGhlcmUgaXMgYXQgbGVhc3QgYSBtaW5pbXVtIHByZXNz dXJlIGF2YWlsYWJsZS4gQW55dGhpbmcgYWVyb2JhdGljIG9yIGxvdyB3aW5nIHdpbGwgbmVlZCBw dW1wcy48YnIvPkJpbGwgSmVwc29uPHA+U2VudCBmcm9tIG15IFZlcml6b24gV2lyZWxlc3MgQmxh Y2tCZXJyeTwvcD48aHIvPjxkaXY+PGI+RnJvbTogPC9iPiAiVG9kZCBBcmNoZXIiICZsdDthcmNo ZXJ3dEBnbWFpbC5jb20mZ3Q7DQo8L2Rpdj48ZGl2PjxiPkRhdGU6IDwvYj5XZWQsIDUgTWF5IDIw MTAgMTg6NTI6NDcgLTA3MDA8L2Rpdj48ZGl2PjxiPlRvOiA8L2I+Um90YXJ5IG1vdG9ycyBpbiBh aXJjcmFmdCZsdDtmbHlyb3RhcnlAbGFuY2Fpcm9ubGluZS5uZXQmZ3Q7PC9kaXY+PGRpdj48Yj5T dWJqZWN0OiA8L2I+W0ZseVJvdGFyeV0gR3Jhdml0eSBGZWVkPC9kaXY+PGRpdj48YnIvPjwvZGl2 Pg0KDQo8ZGl2IGNsYXNzPVNlY3Rpb24xPg0KDQo8ZGl2Pg0KDQo8cCBjbGFzcz1Nc29Ob3JtYWwg c3R5bGU9J21hcmdpbi1sZWZ0Oi41aW4nPjxmb250IHNpemU9MyBmYWNlPSJUaW1lcyBOZXcgUm9t YW4iPjxzcGFuIHN0eWxlPSdmb250LXNpemU6MTIuMHB0Jz4mbmJzcDs8L3NwYW4+PC9mb250Pjwv cD4NCg0KPC9kaXY+DQoNCjxkaXY+DQoNCjxwIGNsYXNzPU1zb05vcm1hbCBzdHlsZT0nbWFyZ2lu LWxlZnQ6LjVpbic+PGZvbnQgc2l6ZT0zIGZhY2U9IlRpbWVzIE5ldyBSb21hbiI+PHNwYW4gc3R5 bGU9J2ZvbnQtc2l6ZToxMi4wcHQnPiZuYnNwOzwvc3Bhbj48L2ZvbnQ+PC9wPg0KDQo8L2Rpdj4N Cg0KPGRpdj4NCg0KPHAgY2xhc3M9TXNvTm9ybWFsIHN0eWxlPSdtYXJnaW4tbGVmdDouNWluJz48 Zm9udCBzaXplPTMgZmFjZT0iVGltZXMgTmV3IFJvbWFuIj48c3BhbiBzdHlsZT0nZm9udC1zaXpl OjEyLjBwdCc+QW55b25lIHdobyBrbm93cyBmZWVsIGZyZWUgdG8gZXhwbGFpbiB0byBtZSB3aHkg YQ0KTWFydmVsLVNjaGVibGVyIHVwZHJhZnQgY2FuIGZlZWQgMzAwIGhwIHdpdGggZ3Jhdml0eSBi dXQgcHVtcHMgYXJlIG5lZWRlZCBmb3IgV2ViZXJzDQpvciBIb2xsZXlzLiZuYnNwOyBJIHVuZGVy c3RhbmQgdGhlIHVwZHJhZnQgZ2V0cyBhbm90aGVyIDE4JiM4MjIxOyBvZiBwcmVzc3VyZQ0KYnV0 IGFtIGFzc3VtaW5nIGl0IGlzIHNpbXBseSBieSBkZXNpZ24gdGhhdCB0aGUgcmVzcG9uc2UgaXMg aW1wcm92ZWQgd2l0aCBhIGZldw0KbGJzIG9mIHByZXNzdXJlLiZuYnNwOyBTaW5jZSB3ZSBhcmVu JiM4MjE3O3QgdG9vIHdvcnJpZWQgYWJvdXQgdGhyb3R0bGUNCnJlc3BvbnNlIGFzIGxvbmcgYXMg aXQgZG9lc24mIzgyMTc7dCBzdHVtYmxlLCB3b3VsZCBhIGdyYXZpdHktZmVkIEhvbGxleSBiZSBh DQp3YXN0ZSBvZiB0aW1lPzwvc3Bhbj48L2ZvbnQ+PC9wPg0KDQo8cCBjbGFzcz1Nc29Ob3JtYWw+ PGZvbnQgc2l6ZT0zIGZhY2U9IlRpbWVzIE5ldyBSb21hbiI+PHNwYW4gc3R5bGU9J2ZvbnQtc2l6 ZTogMTIuMHB0Jz4mbmJzcDs8L3NwYW4+PC9mb250PjwvcD4NCg0KPHAgY2xhc3M9TXNvTm9ybWFs IHN0eWxlPSd0ZXh0LWluZGVudDouNWluJz48Zm9udCBzaXplPTMgZmFjZT0iVGltZXMgTmV3IFJv bWFuIj48c3BhbiBzdHlsZT0nZm9udC1zaXplOjEyLjBwdCc+VG9kZDwvc3Bhbj48L2ZvbnQ+PC9w Pg0KDQo8L2Rpdj4NCg0KPGRpdj4NCg0KPHAgY2xhc3M9TXNvTm9ybWFsIHN0eWxlPSdtYXJnaW4t bGVmdDouNWluJz48Zm9udCBzaXplPTMgZmFjZT0iVGltZXMgTmV3IFJvbWFuIj48c3BhbiBzdHls ZT0nZm9udC1zaXplOjEyLjBwdCc+Jm5ic3A7PC9zcGFuPjwvZm9udD48L3A+DQoNCjwvZGl2Pg0K DQo8ZGl2Pg0KDQo8cCBjbGFzcz1Nc29Ob3JtYWwgc3R5bGU9J21hcmdpbi1sZWZ0Oi41aW4nPjxm b250IHNpemU9MyBmYWNlPSJUaW1lcyBOZXcgUm9tYW4iPjxzcGFuIHN0eWxlPSdmb250LXNpemU6 MTIuMHB0Jz4mbmJzcDs8L3NwYW4+PC9mb250PjwvcD4NCg0KPC9kaXY+DQoNCjwvZGl2Pg0KDQo8 L2JvZHk+DQoNCjwvaHRtbD4NCg0K --part17710-boundary-78052072-1648098726--