REFLECTOR: Steerable Nosewheel was:Extreme Takeoff

Fri Oct 19 14:16:32 CDT 2012

Love to see your idea. Would make a huge difference on take off to steer 
with out brakes.

Ron
On 10/19/2012 1:30 PM, Brian Michalk wrote:
> I have all of the parts on hand, except for a bracket that needs to be 
> machined for my steerable nosewheel.
>
> It is electric, and rotates via a knob that controls the rate of 
> rotation.  The next design upgrade will include a position encoder so 
> that the knob position indicates and commands actual nosewheel position.
>
> The system maintains the friction components that we currently use, 
> and allows for castoring as it is currently provided.  The steering 
> part is above the fork/friction washers, so with power loss, the 
> system behaves like the conventional design.
>
> I had to re-order some parts, and should be able to see if the concept 
> works in a few weeks.  I might just go with a lot of hose clamps for 
> mounting, to test the system rather than machining the mounting bracket.
>
> I am dangerously close to my second first flight, so once I'm in the 
> air, the steerable nosewheel project could get delayed. Pictures to 
> follow.
>
> On 10/19/2012 12:00 PM, Scott Derrick wrote:
>> 17 knots?? Are you kidding!!!
>>
>> I have a STD RG.
>>
>> I've landed in direct Xwinds up to 40 knots, though that one was a 
>> bit on the exciting side.
>>
>> 20-25 knots is not unusual in the spring and summer here at GNT.
>>
>> John, I was told by Brenden, your predecessor, that 17 knots was not 
>> even close to the max, it was just what the factory had tested it to. 
>> My experience has validated his statement.
>>
>> Scott
>>
>>
>> -------- Original Message --------
>> Subject: Re: REFLECTOR: Extreme Takeoff
>> From: John Abraham <john at velocityaircraft.com>
>> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>> Date: 10/19/2012 08:18 AM
>>
>>> John
>>>
>>> That is why the max demonstrated cross for the original system is 
>>> 17kts. You don't have enough rudder without brakes being applied. 
>>> The toe brakes max demonstrated is the pilot more than the aircraft.
>>>
>>> On Oct 19, 2012, at 9:47 AM, John Dibble <aminetech at bluefrog.com> 
>>> wrote:
>>>
>>>> Original.
>>>>
>>>> On 10/19/2012 8:40 AM, John Abraham wrote:
>>>>> John
>>>>>
>>>>> What pedal system do you have?  Original or tow brakes?
>>>>>
>>>>> On Oct 19, 2012, at 9:28 AM, John Dibble <aminetech at bluefrog.com> 
>>>>> wrote:
>>>>>
>>>>>> Yesterday I flew from KS (MPR) to MS (5R2).  I delayed this 
>>>>>> flight from the previous day to avoid strong headwinds and 
>>>>>> weather and for the advantage of a strong tailwind yesterday.  
>>>>>> There was a 25 kn crosswind at MPR.  While taxiing, the plane 
>>>>>> kept turning toward the wind.  That was the first time that has 
>>>>>> happened and my first time taking off in a very stong crosswind.  
>>>>>> With my IVO set for 2600 rpm static, I had max accelerating 
>>>>>> capability to get airborne in as little time as possible.  During 
>>>>>> the takeoff roll I had to jab the downwind brake 2 times to keep 
>>>>>> it on the runway.  I was anxious to get off the ground and 
>>>>>> rotated asap.  Being in the air was definitely the lesser of 2 
>>>>>> evils.  I think doing this with a FP prop would not be possible 
>>>>>> since the long time for t/o roll would require so much braking 
>>>>>> that the rotation speed could not be reached.  At 9500' I had 
>>>>>> tailwinds as high as 70kn.  The air was smooth as expected 
>>>>>> according to the winds aloft charts.
>>>>>> I think I'll need to do something to increase oil temp for the 
>>>>>> winter.  Due to changes I've made over the past few years, my oil 
>>>>>> temp and chts have gone from high to low. Yesterday at an OAT of 
>>>>>> 32F, my oil was 58C (with heat flap fully deployed).  chts 
>>>>>> 80-90C. I was comfortable wearing pants and long-sleeve shirt. 
>>>>>> However bright sun at 12 o'clock provided some heat as well.  I 
>>>>>> think I need to partially block the cooler. What have others 
>>>>>> done?  How much do you block?
>>>>>>
>>>>>> John
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>>>>
>>>>
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>>
>
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