REFLECTOR: Re Airfoils (Reiff Lorenz)

[Brooke Wolf]

Tell you guys a funny story about TLAR.

I was fortunate enough to rent some space in the Velocity Service Center during 2009-2010 where I built my Velocity.  Even though I did 95% of the work myself, I was also very fortunate to have a lot of very good eyeballs looking at it as I progressed.

Shortly after engine installation, Danny Maher made one of his many wanderings through the service center.  He stopped behind my airplane, gazed at it, and said “That engine is on there crooked.”  Of course my initial reaction was denial.  However, after several efforts of measurements to disprove him, his observation was undeniable.  We shimmed the copilot side mount 1/2 inch….with other diminishing shims toward the pilot side.

Danny Maher TLAR’s are priceless.

Brooke

> 
> 
>   3. Re:  Airfoils (Reiff Lorenz)
> 
> 100 hours on her).
>  
> Date: Thu, 5 Dec 2013 19:41:39 -0500
> From: Reiff Lorenz <Reiff at Lorenz.com>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> Subject: Re: REFLECTOR: Airfoils
> Message-ID:
>                 <BFD8FEA9F3C5194597CF740E290D0DFA223D3F621A at tlc10.lorenz.com>
> Content-Type: text/plain; charset="us-ascii"
>  
> >> Anyone know of the Airfoil sections on the wing and canard?  <<
>  
> David,
>  
> Many in the Velocity community will tell you that the Velocity airfoils are TLAR designs . . . that Danny Maher shaped them until "They Look About Right!" Funny story, but I think there's a more accurate description.
>  
> Danny built 2 Long EZs before creating the Velocity. The Wiki's unofficial history<http://wiki.velocityoba.com/index.php?title=UnOfficial_Velocity_History> of the Velocity claims that the Velocity wings are "modified Long-EZ
> airfoils with Roncz vortilons added." This makes sense, given the designer's history. I had tried to find more information on the canard design, but was unable to find any magazine articles or online sources that referenced it.
>  
> I ran into Danny Maher when I was in Sebastian for Head Start in 2012. I asked him about the Velocity's airfoils. He confirmed the wings were "modified Long-EZ," adjusted to the larger plane he wanted.  He could not give me specifics on the "adjustments," perhaps lending some truth to the TLAR story. When asked about the canard, he said that at the time he was designing the Velocity, the Rutan canard community was struggling with the Glasgow University (GU) canard's problem with losing lift when "contaminated" with rain drops. Danny's neighbor at the airport had an old German glider that was in disrepair. Danny claimed that the Germans made some of the best-performing airfoils in the world, so modeled his canard off of the glider's horizontal stabilizer, scaled up to the appropriate size (and inverted, obviously). I tried to get details on the make and model of the glider, but Danny couldn't recall. I even asked if the plane's remains were still in the area, but they had been removed long ago. I didn't pursue this any further; just added a few details about the canard to the wiki and moved on.
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> I don't know if this helps with your model, but either way I thought you'd find it interesting.
>  
> Would love to hear more about your research, analysis, and modeling. Maybe post something here or send me a longer write-up and high-res images for the newsletter?
>  
> Thanks!
>  
> Reiff Lorenz, Dayton, OH
> Velocity XL-RG, 51% complete
> Currently working on: Exhaust routing
>  
>  
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>  
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