LNC4 Altitude Performance related to weight

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From: Carl Scheid <carlscheid [at] att.net>
Sender: <marv [at] lancaironline.net>
Subject: LNC4 Altitude Performance related to weight
Date: Sun, 14 Sep 2014 10:56:00 -0400
To: <lml [at] lancaironline.net>

LIVP PERFORMANCE

The performance spread sheet we developed for the phase
one testing of our 280 HP  IO550 G LIV was modified to include the 310 HP,
TSIO 550 G. Following are some results for the effect of speed and weight on
climb performance and the effect of weight on cruise performance. This TSIO
spread sheet should give a good indication of the relative effects of weight and
IAS. However the absolute values of ROC and TAS apply only to our Four.  Absolute values for other Fours would
require model tweaking based on a few test results.

clip_image002clip_image004

 

FIG 1      WEIGHT HAS A BIG
EFFECT ON BEST RATE OF CLIMB

FIG 2      THE PENALITY FOR
EXCESSIVE CLIMB SPEED INCREASES WITH ALTITUDE

 

 

TABLE 1

CLIMB SEA-LEVEL TO 10000, 16000
AND 22000 FT ISA AT 2500 RPM AND 3600 LBS

% PWR*

MAP IN

KIAS

MIXTURE

TO 10000 FT

TO 16000 FT

T0 22000 FT

 

MIN

GAL

MIN

GAL

MIN

GAL

85

30.5

135

BEST POWER

11.8

3.8

20.0

6.4

29.4

9.3

90

34 WOT

135

FULL RICH

10.3

4.9

17.1

8.0

25.1

11.2

85

30.5

165

BEST POWER

17.2

5.6

31.8

10.2

62.1

19.5

FULL RICH AND WIDE OPEN THROTTLE (WOT) PROVIDES MINIMUM
CLIMB TIMES AND CLOSE TO MINIMUM FUEL BURN.

TABLE 2

CRUISE AT 3600 LBS, 75% PWR*,
28.5” MAP, 2400 RPM

ISA ALT FT

BHP

BEST POWER GPH

KTAS

NM/GAL

10000

229

16.9

210

12.4

16000

224

16.5

219

13.3

22000

217

16.0

226

14.1

 

 

 

 

SPEED AND RANGE IMPROVE WITH ALTITUDE AND WEIGHT
REDUCTION

TABLR 3

CRUISE AT 75% PWR*, 16000 FT,
28.5” MAP, 2400 RPM, 224 BHP, BP (16.5 GPH)

WEIGHT LB

10000 FT, 16.9
GPH

16000 FT, 16.5
GPH

22000 FT, 16.0
GPH

 

KTAS

NM/GAL

KTAS

NM/GAL

KTAS

NM/GAL

2800

218

12.9

228

13.8

238

14.9

3200

214

12.7

224

13.6

232

14.5

3600

210

12.4

219

13.3

226

14.1

 

 

 

 

·        
Sea level
power


Image


clip_image002[2].png


Image


clip_image004[2].png

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