REFLECTOR: Speed brake usage question

[Scott Derrick]

Scott,

Were talking extension speed for the "speed brake" not the gear doors.

Scott


> Velocity's main concern is the potential for the gear doors to depart and
> fly into the propeller.  Unofficially, we have been using a V-gear down
> speed of 130knots on RG models; 125knots extension speed.  RG models, with
> the gear doors removed, can be flown to Vne.
> SB
>
> ----- Original Message -----
> From: "Scott Derrick" <scott at tnstaafl.net>
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> Sent: Monday, November 08, 2004 12:45 PM
> Subject: Re: REFLECTOR: Speed brake usage question
>
>
>>I wonder what the factory says about increasing the extension speed to
>> 160
>>kias???  Is it really strong enough for continuos usage at that speed?
>>
>> That would make the brake a much more versatile tool.
>>
>> My fear is it eventually coming off, right into the prop!
>>
>> Scott
>>
>> At 07:44 AM 11/8/2004, you wrote:
>>>Dave,
>>>
>>>I've already done the test for you.  One time at 160 IAS I hit a good
>>>bump that bumped my head on the ceiling.  My shin bumped several toggle
>>>switches located at the bottom of the panel (not the best place for the
>>>switches), including the speed brake switch.  At first I couldn't figure
>>>out why I lost 25kn of airspeed until I saw a few indicator lights on.
>>>The brake still works fine with no damage.
>>>
>>>John
>>>SGRE
>>>
>>>David Scharfenberg wrote:
>>>
>>> > The maximum airspeed for speed brake extension is 110, which is less
>>> > than the gear speed.  On other planes I fly, the speed brakes can be
>>> > deployed at any speed.  This helps on a quick decent and helps bleed
>>> > off speed for gear extension.  I have been wondering if the airspeed
>>> > for partial speed brake extension would be more than the current 110
>>> > limit.  This would make the speed brake more useful.  Of course I
>>> know
>>> > who sets the actual limit on my plane, but  don't really want damage
>>> > it doing the airspeed tests.
>>> >
>>> >
>>> > Dave Scharfenberg
>>> > std/RG
>>>
>>>
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>>
>>
>> "Those who sacrifice freedom to get security, deserve neither."
>> - Benjamin Franklin
>>
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>
>
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