REFLECTOR: Speeds

Richard J. Gentil richard at naples-air-center.com
Thu Jun 7 09:40:48 CDT 2012


Scott,

At 7,500 feet I can get mid 150's kts KTAS 52F burning 7.5gph. Just watching the EGTs and setting them, not using a lean assist program. 

I am running dual EI. (E-Mag & P-Mag)

Richard 

Sent from my iPhone 4 Classic

On Jun 7, 2012, at 8:48 AM, Scott Derrick <scott at tnstaafl.net> wrote:

> That sounds good to me, certainly better than my IO360 did.  I shopped around quite a bit and one of the criteria was a fast one.
> 
> What kind of fuel burn are you seeing at max cruise speed and is that ROP or LOP?
> 
> Scott
> 
> -------- Original Message --------
> Subject: Re: REFLECTOR: Speeds
> From: Richard J. Gentil <richard at naples-air-center.com>
> To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
> Date: 06/06/2012 11:38 PM
> 
>> Hey Scott,
>> 
>> On the deck I was indicating 165-168 kts KIAS
>> 
>> At 6,500 feet I was indicating 150-151 kts KIAS figure temp around 56F and altimeter around 30.03 if memory serves.
>> 
>> As for the altitudes between 1,000 feet and 6,500 feet I do not exactly remember but they trued out around 170 kts KTAS.
>> 
>> Richard
>> 
>> 
>> 
>> Sent from my iPhone 4 Classic
>> 
>> On Jun 6, 2012, at 10:11 PM, Scott Derrick<scott at tnstaafl.net>  wrote:
>> 
>>> So, you do that in the air at 170 KIAS?
>>> 
>>> -------- Original Message --------
>>> Subject: Re: REFLECTOR: Speeds
>>> From: Richard J. Gentil<richard at naples-air-center.com>
>>> To: Velocity Aircraft Owners and Builders list<reflector at tvbf.org>
>>> Date: 06/06/2012 06:10 PM
>>> 
>>>> Scott,
>>>> 
>>>> I own a 145 repair station with an avionics department. I had my avionics pump up with Velo with the test equipment while I set the calibrating information in both EFIS systems. Altimeter and airspeed are calibrated from -1,000 feet to 25,000 feet.
>>>> 
>>>> Richard
>>>> 
>>>> Sent from my iPhone 4 Classic
>>>> 
>>>> On Jun 6, 2012, at 7:48 PM, Scott Derrick<scott at tnstaafl.net>   wrote:
>>>> 
>>>>> Richard,
>>>>> 
>>>>> I think your doing very well at 170 KTAS..
>>>>> 
>>>>> I haven't seen a Std RG any faster when comparing TAS.
>>>>> 
>>>>> I don't have much confidence when I hear somebody reporting faster speeds than that with an STD RG. The longwing STD's are 5-10 knots slower than the orig STD.
>>>>> 
>>>>> There are two main reasons for incorrect airspeed reporting in homebuilts.
>>>>> 
>>>>> 1.) the pitot Static system has not been calibrated. Usually this is a result of a bad static reading. The only way I know of to check this is a very low(50 ft) pass over the runway at cruise speed. before the pass set your altimeter(on the ground) and verify the altitude on your altimeter, add 50 ft for comparison. During the low pass write down the altitude.  If it is off by more than then 50 ft, you probably should adjust your static port. If it reads higher than it should you have too much static pressure, if lower you have too little. I adjusted mine with a small piece of aluminum tape in front of my port, this reduced the pressure and now I read the correct altitude. Because the IAS instrument is a comparator, comparing the pitot pressure against the static pressure, if your static port is off your airspeed indicator will be too.
>>>>> 
>>>>> 2.) The other reason is the confusion between GPS ground speed and TAS. Yes if you are in a no wind situation, very very rare, they are basically equal. but more often than not they are not and you will need to subtract a tailwind component or add a headwind component.
>>>>> 
>>>>> Scott
>>>>> 
>>>>> -------- Original Message --------
>>>>> Subject: Re: REFLECTOR: Speeds
>>>>> From: Richard J. Gentil<richard at naples-air-center.com>
>>>>> To: Velocity Aircraft Owners and Builders list<reflector at tvbf.org>
>>>>> Date: 06/06/2012 04:02 PM
>>>>> 
>> _______________________________________________
>> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>> 
>> Visit the gallery!  www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: www.tvbf.org/pipermail
>> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>> 
> 
> -- 
> Always do right. This will gratify some people and astonish the rest.
> Mark Twain
> _______________________________________________
> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
> 
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html


More information about the Reflector mailing list