Piper PA 28-181 Manual page 61

SECTION 5
PORFORMANCE
PIPER AIRCRAFT CORPORATION
P4.28.I8I, ÄRCHtrR II
\ a l u e s l r o m t h e g r a p h ( F i g u r e 5 - l l ) . \ o w . s u b r r a c t l h e v a l u e s
o b t a i n e d f r o m t h e l i e l d c o n d i l i o n s f r o m t h e \ a l u e s o b r a i n c d l f o m
t h c c r u i s e c o n d i l i o n s t o f i n d t h e l r u c t i m e . d i s l a n c e a n d f u e l \ a l u e s
n e e d e d l b . 1 h e l l i g h t p l a n .
I h e v a l u e s o b l a i n c d b y p f o p e r u r i l i z a t i o D o l ! h e g r a p h s l o . r h c
d e s c € n 1 s e g m € n l o l t h e c x a m p l e a r e s h o w n b e l o s .
( l )
I i m c 1 o D c s c e n d
( 1 6 m i n . m r n u s 7 . 5 m i n . )
8 5 m i n . *
( 2 ) D i s t a n c e t o D e s c e n d
( 3 i m i n u s 1 1 . 5 n a u ! . m ; l e s )
2 0 . 5 n a u t . m i l e s {
( l ) F u e l t o D e s c e n d
( 2 g a l . m i n u s I r a l . )
I g a l +
( e ) C r u r s e
L s i n g t h e 1 o l a l d r s t a n c e t o b e t r a \ e l e d d u r i n q t h e l i g h r . s u b t f a c l
t h e p r e ! i o u s l ! c a l c u l a t e d d i s t a n c e r o . l i n r b a D d d i s l a n c e r o d c s c c n d
t o c s l a b l i s h l h e l o t a l c r u i s e d i s t a n c e . R e l i r t o l h e a p p . o p n a r c A \ c o
I y c o m r n g O p e r a l o r \ N l a n u x l $ h c n s c L e . r i n g r h e c r u i 5 c p o l l e r
s r r r i n g . T h e e \ r a h l ß h e d p r e s s u r e a l t r t d c r n d t e m p e r a r u r e \ a l u e s
a n d ! h e s e l e c t e d c ' u r s e p o w c r s h o u l d n o \ r b e u l i l i / . d l o d e t e n n r D c
t h c l r u e a i r s p e e d l f o m r h e a p p r o p r i r t c S p c r d P o r l e r g r r t h ( l i i q u r e
5 2 l o r 5 - 2 3 )
C . r l c u l a t . l h e c r u i s c l u e l 1 1 o * l o r t h e c r u $ e p o * c r ' s e l l i n s 1 ; o m
t h e i n f o r m a r i o n p f t ) ! i d c d b \ l h e , \ \ c o l v c o m i n g O p c r r r o r ' \
The cruise timc is iound b! dr\ idins rhe cruise di\rance b) thc
cruise spccd rnd the cruisc fuel is lound b) multiplling rh€ crurse
fuel llo{ b\ thc cruisc limc.
T h e c r u i t . c a l c u l a t i o . s e s r a b l i s h e d f o r r h . c r u r s , j \ e g m c n r o l r h e
i l i g h r p l a n n i n g e r a I l l p l e ä r c a s l o l l o $ 1 1
( 1 ) I o t a l D i s t a n c c
- 1 1 4 n r u l . r k s
( 2 ) C r u r \ c l ) ' \ t a n c e
(e)(l) n,inus (c)(4) nrjnLrs (d)r:).
( J I . 1 m i n u s I 1 . 5 m i n u s 1 0 . 5 )
:82 naur. Iniler
* r e t r e n c e F i g u r . 5 l l
R t i P O R T : ! B - l 1 2 0 ISSULD: JtrI-\' 2. l9?9
REVISED: NOVEMBER 15, I982