REFLECTOR: Reflector Digest, Vol 108, Issue 5

Tue Mar 4 12:07:35 CST 2014

 I installed a NACA scoop from a Lancair IV in the bottom cowl with a K&N air filter from a Dodge Viper with plumbing going up to the intake on the engine. I have a Cirrus SR22 alternate air door at the intake if things go wrong. I can't speak to how successful it is because I have not flown it yet, but it is installed in a high pressure area and it works good on the Lancair.

Nick and Connie Jones
Velocity XL-RG
N10CN
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Subject: Reflector Digest, Vol 108, Issue 5

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Today's Topics:

   1. Re:  Air intake (Don Johnston)
   2. Re:  Air intake (Brett Ferrell)
   3. Re:  Air intake (Mike Dawson)

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Message: 1
Date: Mon, 3 Mar 2014 12:36:07 -0600
From: Don Johnston <numa at comcast.net>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Subject: Re: REFLECTOR: Air intake
Message-ID:
	<CALD29ipyRcCd7LpQfi6L_Q3mXTw-DT=X9vQd646zL+152tTY_Q at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

I can't speak to the benefits of a scoop, but Malcolm told me once not to
center it under the cowling. He said that debris from the nose wheel will
get flung up into it.

On Mon, Mar 3, 2014 at 11:11 AM, Jack Prock <jackprock at wavecable.com> wrote:

> Hi,
>
>
>
> I would like to know if anyone has any thoughts on air intakes. I am
> getting down to the last
>
> few items on my list before flight and one thing I was thinking about was
> to put in an air intake
>
> scoop under the engine cowling. Something along these lines:
>
>
>
> [image: NHRA Pro Stock Composite Hood Scoop 100-8506]
>
>
>
> Now my question, is for the people that have put an external air intake on
> the plane.
>
> Do you get a boost at higher altitude because of the ram air effect? Does
> the drag of
>
> the scoop outweigh any positive effect from the boost?
>
>
>
> I have already started designing the scoop, but now have second thoughts
> and wanted
>
> to see if I was going down the wrong path.
>
>
>
> Any thoughts?
>
>
>
> Jack Prock
>
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Message: 2
Date: Mon, 03 Mar 2014 14:25:13 -0500
From: Brett Ferrell <reflector at velocityxl.com>
To: reflector at tvbf.org
Subject: Re: REFLECTOR: Air intake
Message-ID:
	<1393874713.11315.90070521.7186B86E at webmail.messagingengine.com>
Content-Type: text/plain; charset="us-ascii"

Thanks for the shout-out... we do have a narrow deck Lycoming, but it
dynoed at just over 300 HP, with high compression pistons...

--
Brett Ferrell
reflector at velocityxl.com

On Mon, Mar 3, 2014, at 12:49 PM, Mike Dawson wrote:

N44FV, a XLFG with a 260hp Lycoming, has been said to do about 180.
This by Scott Swing who flew it as seen in a you tube video. Whether
this was MPH or KTS really doesn't matter, Here is why.  I own a XLFG
with a 350hp Chevy V8. Other than downhill I have only seen 174KTS flat
out!
Now granted it is still in rough primer but I don't believe paint will
make up for the airscoop I have hanging below the belly for the
radiator.

Our sleek airframes don't like stuff hanging off of them.

N427VA a SERG 427 V8 useing NACA scoops to cool however, hauls ass.
Bill and Brett did it right IMHO!

Mike
N104DD

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Message: 3
Date: Mon, 3 Mar 2014 16:57:30 -0800
From: Mike Dawson <medawson250 at yahoo.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Subject: Re: REFLECTOR: Air intake
Message-ID: <0A6EE711-E0D6-46E4-B9B4-73F14DD0FB3E at yahoo.com>
Content-Type: text/plain; charset="us-ascii"

Well that makes me feel a little better. 
I do have to say mine climbs well but that is usually what excess horsepower does anyway.
My apologies.

Michael E Dawson
ATCI CFII

> On Mar 3, 2014, at 11:25 AM, Brett Ferrell <reflector at velocityxl.com> wrote:
> 
> Thanks for the shout-out... we do have a narrow deck Lycoming, but it dynoed at just over 300 HP, with high compression pistons...
>  
> --
> Brett Ferrell
> reflector at velocityxl.com
>  
>  
>> On Mon, Mar 3, 2014, at 12:49 PM, Mike Dawson wrote:
>> N44FV, a XLFG with a 260hp Lycoming, has been said to do about 180. This by Scott Swing who flew it as seen in a you tube video. Whether this was MPH or KTS really doesn't matter, Here is why.  I own a XLFG with a 350hp Chevy V8. Other than downhill I have only seen 174KTS flat out!
>> Now granted it is still in rough primer but I don't believe paint will make up for the airscoop I have hanging below the belly for the radiator.
>>  
>> Our sleek airframes don't like stuff hanging off of them.
>>  
>> N427VA a SERG 427 V8 useing NACA scoops to cool however, hauls ass. Bill and Brett did it right IMHO!
>>  
>> Mike
>> N104DD
> _______________________________________________
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> 
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End of Reflector Digest, Vol 108, Issue 5
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