I've just read this months offering of Sailplane and Gliding. there is
an article on the new EB28 and in the article they reference having had
electronic turbulators fitted. Could someone explain what these are please.

Thanks,

Phil

The EB28 has the usual blow-holes on the underside of the wings that control
the boundary layer separation. The airflow to these holes is controlled by
electrically operated valves that open or close in response to the glider's
airspeed. This is supposed to optimise the turbulating effect of the holes
in accordance with the glider's airspeed.

David Starer

"phil collin" > wrote in message
...
> I've just read this months offering of Sailplane and Gliding. there is an
> article on the new EB28 and in the article they reference having had
> electronic turbulators fitted. Could someone explain what these are
> please.
>
> Thanks,
>
> Phil

And if they quit on final? Shades of Gus Raspet.

At 23:06 03 August 2006, David Starer wrote:
>The EB28 has the usual blow-holes on the underside
>of the wings that control
>the boundary layer separation. The airflow to these
>holes is controlled by
>electrically operated valves that open or close in
>response to the glider's
>airspeed. This is supposed to optimise the turbulating
>effect of the holes
>in accordance with the glider's airspeed.
>
>David Starer
>
>'phil collin' wrote in message
...
>> I've just read this months offering of Sailplane and
>>Gliding. there is an
>> article on the new EB28 and in the article they reference
>>having had
>> electronic turbulators fitted. Could someone explain
>>what these are
>> please.
>>
>> Thanks,
>>
>> Phil
>
>
>

Nyal Williams wrote:
> And if they quit on final?

Quit = fully closed - no turbulation: Your drag increases slightly and
you have close the spoilers slightly to compensate.

Quit = fully open - full turbulation: probably normal operation.

Johnson regularly disables the turbulators on the gliders he tests,
including those with blowholes. He doesn't report any change in flight
behavior.

Shades of Gus Raspet.

Huh?

>
> At 23:06 03 August 2006, David Starer wrote:
>> The EB28 has the usual blow-holes on the underside
>> of the wings that control
>> the boundary layer separation. The airflow to these
>> holes is controlled by
>> electrically operated valves that open or close in
>> response to the glider's
>> airspeed. This is supposed to optimise the turbulating
>> effect of the holes
>> in accordance with the glider's airspeed.
>>
>> David Starer
>>
>> 'phil collin' wrote in message
>> ...
>>> I've just read this months offering of Sailplane and
>>> Gliding. there is an
>>> article on the new EB28 and in the article they reference
>>> having had
>>> electronic turbulators fitted. Could someone explain
>>> what these are
>>> please.
>>>
>>> Thanks,
>>>
>>> Phil
>>
>>
>
>
>


--
Change "netto" to "net" to email me directly

Eric Greenwell - Washington State, USA

www.motorglider.org - Download "A Guide to Self-launching Sailplane
Operation"