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Date: Wed, 24 Mar 2010 11:28:22 -0400
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Subject: Re: Lancair 235
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From: Lorn H Olsen <lorn@dynacomm.us>
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References: <list-4176930@logan.com> <721E77A3-9201-4C23-8315-1B3E63314CC4@charter.net>

Randy,

That 285=B0F means that you are cooling very well. Hence, more drag. I =
run anywhere from 340=B0F on a cool day at 6 gph to 385=B0F on a warm =
day at 8 gph.

Lorn

On Mar 24, 2010, at 9:09 AM, Terrence O'Neill wrote:

> lorn and randy
>=20
> 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.
>=20
> Terrence O'Neill
> 235/320
> N211AL
>=20
> On Mar 24, 2010, at 5:27 AM, randy snarr wrote:
>=20
>> 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...
>>=20
>> Randy Snarr
>> 235/320
>> N694RS
>>=20
>> --- On Tue, 3/23/10, Lorn H Olsen <lorn@dynacomm.us> wrote:
>>>=20
>>> From: Lorn H Olsen <lorn@dynacomm.us>
>>> Subject: [LML] Re: Lancair 235
>>> To: lml@lancaironline.net
>>> Date: Tuesday, March 23, 2010, 6:09 AM
>>>=20
>>> Terrence,
>>>=20
>>> I don't know for sure. Here are some possibilities.
>>>=20
>>> 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.
>>>=20
>>> How fast does your 235/320 cruise at 8 gph.
>>>=20
>>> Lorn
>>>=20
>>>> > 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
>>>> >=20
>>>> >=20
>>>> > 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
>>>>=20
>>> --
>>> 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
>=20