REFLECTOR: First long Cross Country

Scott Derrick scott at tnstaafl.net
Mon Jun 25 08:46:27 CDT 2012


If its nice and smooth, I'll go for a full power 400-500 fpm descent 
letting the ias creep up above 180 kts.

If its bumpy I'll plan on a low power 800-1000 fpm descent, keeping the 
EGT's up around 1400-1450 to prevent shock cooling. You have to 
monitor/adjust them closely or you'll peak them as you descend. I 
generally pull off power in 200 rpm increments of 2 minutes each until I 
get the descent rate I want at the ias I'm looking for. That would be 
about 2 inches of map increments for you CS prop folks.  The bumpier it 
is the slower ias I'll be targeting.

The Velocity doesn't like to descend rapidly and slow down at the same 
time. A problem I'm happy to live with! ;-)

Scott

-------- Original Message --------
Subject: Re: REFLECTOR: First long Cross Country
From: Richard J. Gentil <richard at naples-air-center.com>
To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
Date: 06/24/2012 08:00 PM

> Scott,
>
> Thank you for the info. From high altitude what descent rate do you plan for?  You use the standard 500ft/min or do you use less and go with the higher TAS over a greater distance?
>
> Richard
>
> Sent from my iPhone 4 Classic
>
> On Jun 24, 2012, at 7:38 PM, Scott Derrick<scott at tnstaafl.net>  wrote:
>
>> I've made numerous 600+ mile trips in my Velocity, non-stop and with a stop.
>>
>> I typically fly between 9500 and 12500, high enough to miss most of the dirt and low enough to not use O2.  I've made trips at lower altitude but never liked the fuel burn penalty.
>>
>> I do carry O2 at times. I really don't like to use it, it is such a PITA. But when I've needed it to top a cloud layer or get above the summer bumps, I've appreciated it. I'm not convinced I save any gas by flying higher than 12500 or 13500.  Unless there is a wicked tail wind in the upper teens that you can catch a ride on. It takes a much longer climb to 18,000 ft and its going to take quite a few miles at the reduced fuel burn you'll get at the higher altitude to make up for that.
>>
>> Scott
>>
>>
>> -------- Original Message --------
>> Subject: Re: REFLECTOR: First long Cross Country
>> From: Richard J. Gentil<richard at naples-air-center.com>
>> To: Velocity Aircraft Owners and Builders list<reflector at tvbf.org>
>> Date: 06/24/2012 09:15 AM
>>
>>> Looks like a major tangent here.
>>>
>>> For a long cross country in the Velo do you see good speed gains in the mid teens? 14,500 to 17,500 or do they fly better low around 6,500?
>>>
>>> With the EI I will gain better fuel efficiency up high, I was wondering if there are any benefits of flying up in the area where O2 is required if you are going on a long trip?
>>>
>>> Richard
>>>
>>> Sent from my iPhone 4 Classic
>>>
>>> On Jun 22, 2012, at 7:23 PM, "Richard J. Gentil"<richard at naples-air-center.com>   wrote:
>>>
>>>> I am planning on taking my first long trip in my Normally Aspirated, Dual EI, MT, IO-390, SERG. Going from Naples, FL to Norfolk, NE. (Day VFR. Not ready to test her in IFR yet.)
>>>>
>>>> I figure I can make it with one stop to stretch the legs and relieve the bladder.
>>>>
>>>> My question is cruising altitudes. (I can take an O2 bottle if there is any good gain by going up 16,500 or 17,500).
>>>>
>>>> What altitudes do you find most efficient etc for a Velo.
>>>>
>>>> I have two timing advance curves with my E-Mag and P-Mag. I am currently using curve A as set by the factory not tried curve B yet. (I have not hooked them up at an EICAD yet.)
>>>>
>>>> <image.jpeg>
>>>>
>>>>
>>>> I would be very interested in your recommendations.
>>>>
>>>> Richard
>>>>
>>>> Sent from my iPhone 4 Classic
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>>
>> --
>> He who has injured thee was either stronger or weaker than thee. If weaker, spare him; if stronger, spare thyself.
>> William Shakespeare
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> _______________________________________________
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>
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