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I was using the RDD de-ice system.
On 4/4/13 8:59 AM, "Andrea Katz" <bu131@swbell.net> wrote:
>Which de ice are you using. Tks or rdd?
>
>Sent from my iPhone
>
>On Apr 4, 2013, at 7:00 AM, RONALD STEVENS <ronald@sdc.com> wrote:
>
>> I do have the same number between ROP/LOP. But for me taking off the
>> de-ice had a larger effect. I got at least 12 kts or better extra
>>speed. I
>> used to cruise 240 (full fuel, 2 250lbs persons and luggage) and 247
>>(with
>> 1/3 tanks) @ 17500 LOP.
>>
>> Now I am cruising LOP 254-256kts with the same configuration. Making me
>> very happy as my plane is called 'a heavy IV-p bird lol
>> And if you can count 2-3kts/1000ft that would make it flying
>> 270kts/level250 :)~ (MP 31.5, FF=19, 2500rpm, >80 degrees LOP)
>>
>> -- Ronald (>260hours and counting)
>>
>> On 4/3/13 7:47 PM, "Craig Berland" <cberland@systems3.net> wrote:
>>
>>> I pickup about 8 kts when running ROP. I pickup about 3 kts per
>>>thousand
>>> feet increase in altitude. The "air" can change the TAS 10-15 kts
>>>pretty
>>> easy, so getting good test data is difficult. I ran some tests back to
>>> back ROP and then LOP at a variety of altitudes. 8 kts is a decent rule
>>> of thumb.
>>> Craig
>>>
>>> Sent from my iPad
>>>
>>> On Apr 3, 2013, at 8:24 AM, "Colyn Case" <colyncase@earthlink.net>
>>>wrote:
>>>
>>>> Craig,
>>>>
>>>> just noodling about my de-ice again. trying to figure out how slow
>>>>I'm
>>>> going to be.
>>>> I only have ROP numbers on my plane at fl250. Trying to convert those
>>>> into LOP speed.
>>>> Do you have ROP numbers for your plane up there? In other words do
>>>>you
>>>> know your ROP to LOP speed penalty?
>>>>
>>>> Colyn
>>>>
>>>> On Jul 24, 2012, at 7:57 AM, Craig Berland wrote:
>>>>
>>>> Flight to OSH from Sedona, AZ...actually to Yankton, ND for lunch and
>>>> fuel.
>>>> Sunday
>>>> ISA +35
>>>> FL 250
>>>> MP 31.9
>>>> RPM 2500
>>>> FF 17.1 gph
>>>> TAS 277 (Chelton)
>>>>
>>>> Craig Berland
>>>> N7VG
>>>>
>>>> Sent from my iPad
>>>>
>>>> On Jul 23, 2012, at 7:31 AM, "jeffrey liegner" <liegner@ptd.net>
>>>>wrote:
>>>>
>>>>> Power and Flight parameters from today's flight test.
>>>>>
>>>>> Level FL240 west bound: 15*F (IAS+41F)
>>>>>
>>>>> MAP 31.5
>>>>> RPM 2400
>>>>> Fuel 17.1 gph (LOP) FP 30
>>>>> TAS 257
>>>>> LIAS 174
>>>>> High CHT 394 (#2, of course)
>>>>> Cabin Altitude 10,000' (PSID 5.0)
>>>>>
>>>>> If Fuel 18.1 gph, speed increases TAS 264 but CHT increase.
>>>>>
>>>>> http://flightaware.com/live/flight/N334P
>>>>>
>>>>> Comments? Analysis?
>>>>
>>>>
>>>>
>>>>
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>>>>
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>>>
>>>
>>>
>>>
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>>
>>
>>
>>
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