REFLECTOR: air induction

[Jeff Howell]

I have a air filter off a cessna 172 cowling it measures about 6" * 6.6". I was thinking about putting the whole filter into the air stream as it would be on a cessna. I just don't want to create too much pressure as well as lots of drag. does anyone have a franklin with a scoop as well as some pics?? thanx Jeff

From: johnt at comp-sol.comTo: reflector at tvbf.orgDate: Sat, 20 Sep 2008 23:28:52 -0500Subject: Re: REFLECTOR: air induction





Jeff,
 
Ken Parser, in Speed with Economy, suggests an inlet size 10% greater than the throat area of the carburetor. 
 
Don at Airflow has suggested creating a diverging duct - 7.5 deg. included angle.
 
And Gary Hertzler suggested expand to 2 times the fuel inlet area (Minimum)
 
John


From: reflector-bounces at tvbf.org [reflector-bounces at tvbf.org] On Behalf Of Jeff Howell [jeffreyhowell at hotmail.com]Sent: Saturday, September 20, 2008 7:27 PMTo: Velocity Aircraft Owners and Builders listSubject: REFLECTOR: air induction

Ken,     Engine run went well. I was wondering what other people are doing for their air induction system on a franklin engine. How big of a scoop on the bottom and how much ram air? Can I make the scoop too big and cause problems??  I am in the process of designing a card heat box and filter assy. and would like to know all of the safety issues. thanx Jeff


From: kenb at velocityaircraft.comTo: reflector at tvbf.orgDate: Wed, 10 Sep 2008 10:19:14 -0400Subject: Re: REFLECTOR: Engine run


Jeff,
 
Sure, we run engines with the wings and canard off all the time. Just make sure that you properly restrain the aircraft - chalks, chains, etc. Also, make sure to have a safety spotter standing by with a fire extinguisher.
 
Beyond that  - let her rip!
 
Best,
 
-Ken Baker
kenb at velocityaircraft.com


From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Jeff HowellSent: Wednesday, September 10, 2008 2:39 AMTo: Velocity Aircraft Owners and Builders listSubject: REFLECTOR: Engine run
Ken, I am going to be running my engine for the first time this weekend. I was wondering if there is anything I should know before doing so. I am not currently at the airport so the wings are not installed. has this been done before and IS IT SAFE? thanx Jeff > From: kenb at velocityaircraft.com> To: reflector at tvbf.org> Date: Fri, 29 Aug 2008 13:33:14 -0400> Subject: Re: REFLECTOR: Web alert Velocity web page changed> > All,> > In the process of trying to clean up the manual webpages -- no actual> changes to the manuals themselves.> > Best,> > -Ken> kenb at velocityaircraft.com > > -----Original Message-----> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On> Behalf Of Brian Michalk> Sent: Friday, August 29, 2008 12:40 PM> To: Velocity Aircraft Owners and Builders list> Subject: Re: REFLECTOR: Web alert Velocity web page changed> > Changes to all manuals?> > http://www.velocityaircraft.com/manuals/manualserg.html> > http://www.velocityaircraft.com/manuals/manualsefg.html> http://www.velocityaircraft.com/manuals/manualxlfg.html> http://www.velocityaircraft.com/manuals/manualxlrg.html> http://www.velocityaircraft.com/manuals/manualxlfg5.html> http://www.velocityaircraft.com/manuals/manualxlrg5.html> > > > > > > velocity_monitor at awpi.com wrote:> > For details visit > > http://www.velocityaircraft.com/manuals/manualsefg.html> > The following parts has been changed since last visited:> > ***************> > *** 1,7 ****> > [IMAGE]> > > > - [IMAGE]> > - > > Standard Elite Fixed Gear Construction Manual> > > > Notes: We recommend that you download just the PDF> > --- 1,5 ----> > [IMAGE]> > > > Standard Elite Fixed Gear Construction Manual> > > > Notes: We recommend that you download just the PDF> > > > > _______________________________________________> To change your email address, visit> http://www.tvbf.org/mailman/listinfo/reflector> > Visit the gallery! www.tvbf.org/gallery user:pw = tvbf:jamaicangoose Check> new archives: www.tvbf.org/pipermail Check old archives:> http://www.tvbf.org/archives/velocity/maillist.html> > > _______________________________________________> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector> > Visit the gallery! www.tvbf.org/gallery> user:pw = tvbf:jamaicangoose> Check new archives: www.tvbf.org/pipermail> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html

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