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Randy,
That 285°F means that you are cooling very well. Hence, more drag. I run anywhere from 340°F on a cool day at 6 gph to 385°F on a warm day at 8 gph.
Lorn
On Mar 24, 2010, at 9:09 AM, Terrence O'Neill wrote:
> lorn and randy
>
> Don't know yet, the cruise at 8 gph... have been trying different injectors nozzles on one lean cylinder... to be able to go lean of peak... and distracted with a mystery problem with the comm radio (antenna?)... finally resorted to an ugly external, which may solve it... and now am changing the canopy opening design from the trapezoid wobbly one with the hard-to-ready camlocks that I felt were a safgety item .. to powered slide rails.
> So far I'm doing about 165k down low at about cruise 24/24.5, without experimenting with how much reflex... a little.
> Will focus on reflexing... noting Randy's comment... and reducing the airflow through the engine... running about 285F now...
> I expect I'll be a few knots slower because of the h-tail slots, and the anti-servo trimmer linkage which is not as clean as Randy's and others.
>
> Terrence O'Neill
> 235/320
> N211AL
>
> On Mar 24, 2010, at 5:27 AM, randy snarr wrote:
>
>> My numbers are similar to what has been stated.
>> In my 235/320 I am running injected with electronic ignition and MT 3 blade, best speed for me is at 8000 in cool smooth air 2750 rpm yields198-200 knots TAS depending on the day. Never seen over 200. Burn is 9 GPH rich of peak. This is with the new MT with the schimitar blades. I had the straight blades ( until I broke it) and the best I could get with that propeller was 196 knots TAS never faster. The new prop got me another 4 knots (they predicted 5) .
>> I believe the bottom of the 235 wing has more curve at the rear lower airfoil giving it a slightly down flap effect. Don Goetz told me one day this was done in an attempt to give the wing better low speed characteristics. I am amazed at how much the airplane speeds up with the flaps in reflex. 15 knots or so on mine..
>> It looks to me like the 320/360 wing has the same shape but to a lesser degree resulting in slightly less drag...
>>
>> Randy Snarr
>> 235/320
>> N694RS
>>
>> --- On Tue, 3/23/10, Lorn H Olsen <lorn@dynacomm.us> wrote:
>>>
>>> From: Lorn H Olsen <lorn@dynacomm.us>
>>> Subject: [LML] Re: Lancair 235
>>> To: lml@lancaironline.net
>>> Date: Tuesday, March 23, 2010, 6:09 AM
>>>
>>> Terrence,
>>>
>>> I don't know for sure. Here are some possibilities.
>>>
>>> 1) I could just be wrong.
>>> 2) Reports from 235/320 owners that I have spoken to could understate the speed.
>>> 3) Reports on the 320 from the factory could overstate the speed.
>>> 4) The rectangular cowling on the 235/320 could make a difference.
>>>
>>> How fast does your 235/320 cruise at 8 gph.
>>>
>>> Lorn
>>>
>>>> > From: Terrence O'Neill <troneill@charter.net>
>>>> > Date: March 22, 2010 12:00:17 PM EDT
>>>> > To: lml@lancaironline.net
>>>> > Subject: Re: [LML] Re: Lancair 235
>>>> >
>>>> >
>>>> > Lorn,
>>>> > Quick question: why is the 320 some 15 knots faster than the 235 w/ 320 engine with less wetted area (slightly smaller fuselage)?
>>>> > Terrence (w/ 235 w/ 320 engine) N211AL
>>>>
>>> --
>>> Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
>>> DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
>>> LNC2, FB90/92, O-320-D1F, 1,700 hrs, N31161, Y47, SE Michigan
>
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