|
|
<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
<< Lancair Builders' Mail List >>
<<<<<<<<<<<<<<<<--->>>>>>>>>>>>>>>>
>>
As a wise old man once said, "The male species has one thing in common with
Lancairs, Every Inch Counts!". <G>
Hi Folks,
If you remember, last month I was experiencing a LOSS of half-an-inch of MP
whenever I pushed to open my RAM air valve, which also closed the filtered
air source, prompting Clark Baker to call me 'Wrong-Way' Rick. In looking
at Clark Baker's pictures and Hollis Helm's set-up, both of which uses the
AirFlow Performance RAM air setup, I decided to duplicate their setup.
AirFlow performance graciously sent me an old unit for test fitting but
unfortunately it was way too big. No choice here but to fabricate my own. I
purchased some 3-inch dia cylindrical Styrofoam and a cone-shaped one with a
4-inch base from the local art supply store. Cut, glued, and taped the
pieces together. I increased the size of the lower cowling intake hole to 3
inches and fabricated a 1-inch lip. I then cut the existing air box (from
Lancair) to size and made a RAM air unit out of fiberglass (pictures to
follow soon). Also made a butterfly valve to open and close the RAM air
intake, but leaving the filtered air always open. I tried this setup
yesterday and here are the initial results:
Constant Values:
Alt Setting: 29.9 In Hg, MSL Alt = 8,500 ft, Den Alt = 9,983 ft, OAT =
11-Deg C
RAM Air Close:
MP = 21.40, 2,500 RPM, IAS = 161 Knots, TAS = 187 Knots
RAM Air Open:
MP = 23.10, MP Delta = 6.8", MP Gain = 1.7", 2,500 RPM, IAS = 170 Knots,
TAS = 197.20 Knots
MP = 22.90, MP Delta = 7.0", MP Gain = 1.5", 2,580 RPM, IAS = 175 Knots,
TAS = 203.00 Knots (Yipeee!!!)
MP = 22.70, MP Delta = 7.2", MP Gain = 1.3", 2,500 RPM, IAS = 168 Knots,
TAS = 195.60 Knots (Butterfly valve partially closed)
Average GPS Ground Speed (westbound/east bound Average) = 201.5 Knots
(Yipeee!!!)
At 8,500 ft, 29.9" Alt setting, the MP should be around 21.4". MP with RAM
Air boost resulted in a gain of between 1.3" to 1.7".
Not bad at all, I guess it works, many thanks to all that contributed to this
endeavor.
More test to follow next month at varying altitudes and settings but for now
N360ZR goes to the paint shop this weekend.
BTW, the TK5 shock absorbers was an absolute joy to ride on! So far, only
had three landings on them and I didn't hear the airframe complain once.
Remember, Every Inch Counts!!
Rick Argente
N360ZR
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
LML website: http://www.olsusa.com/Users/Mkaye/maillist.html
Builders' Bookstore: http://www.buildersbooks.com/lancair
Please send your photos and drawings to marvkaye@olsusa.com.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
|
|