REFLECTOR: FW: Blended Winglets and intersection fillets.

[Lawrence Epstein]

Sorry- you are correct. 3" radius

On Wed, Aug 3, 2011 at 10:40 AM, <cgputney at genevaonline.com> wrote:

> **
> Larry,
> Was the resulting *radius* 3 inches or 1.5 inches?
> Gordon
>
> ----- Original Message -----
> *From:* Lawrence Epstein <ljepstein at hotmail.com>
> *To:* Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> *Sent:* Wednesday, August 03, 2011 9:17 AM
> *Subject:* Re: REFLECTOR: FW: Blended Winglets and intersection fillets.
>
> We made a 3"radius fillet at the Fuselage to strake intersection, top &
> bottom. We did this using pour foam which we then sanded down with a 3" PVC
> pipe and then covered with BID.
>
> We had some engineers at a certain Aerospace company in Mohave (thanks
> Ken!) look at the prospect of doing the same thing on the wing-winglet
> interface and the feeling was that the drag reduction would be minimal and
> the exact shape required would necessitate extensive testing. The blended
> winglet would work better here.
>
> I will attach photos when I get access to them (maybe tonight).
>
> Larry Epstein
>
> On Wed, Aug 3, 2011 at 9:22 AM, Alex Balic <velocity_pilot at verizon.net>wrote:
>
>> **
>>
>> ****
>>
>> ****
>>
>> ****
>>
>> Regarding Kevin’s e-mail from Monday- Yes, significant drag reduction for
>> airfoil-to-airfoil intersections like on the winglet to wing area, and good
>> drag reduction on fuselage to wing interface areas- I have just finished
>> molding up diverging fillets for my upper cowl- to go with the ones on the
>> winglets- according to the designer of the AR-5 (and many others) these
>> areas become  significant source of drag at higher speeds - I have included
>> construction pics – they have since been finished… I will post pics of the
>> wing –to-cowl fillets if anyone is interested.  I have the foam forms shaped
>> on the aircraft, need to get the layups done on them this week.****
>>
>> Ron Gowan (multiple long EZ builder) is working on producing a new kit
>> that uses true blended winglets (not just fillets) it is called the Nexus-
>> see pic below -he will be trying to market it at some point- I have enclosed
>> a picture of that one for the winglet details,  but his spars are actually
>> single pieces that run up into the winglets with the radius at the
>> intersection, so it would be difficult to recreate on a **Velocity**.****
>>
>> Alex****
>>
>> ****
>>
>> Nexus (prototype is a twin)****
>>
>> ****
>>
>> ****
>>
>> ****
>>
>> **Velocity** Wing/winglet intersection fairing from aft (minus the
>> rudder)****
>>
>> ****
>>
>> ****
>>
>> View from the front****
>>
>> ****
>>
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>
>  ------------------------------
>
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