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RV9A and why

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rv9jim(at)juno.com
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Posted: Sun May 13, 2007 6:07 am Post subject: RV9A and why

Rafeal,

        I went thru the same decisions.  I went for the 9A beacuse of the

better handling as slow speeds.  I however went with the IO-360  (ala -

RV7  fwf).  I did this because with the IO 360 and LOW COMPRESSION

pistons you still have 167 hp.  More than enough for the 9A.  The big

reason again is:  First, the low compression version is 7.2 : 1 which

allows for (need i say) auto gas.  I refer to it as garbage gas.  This

can give you the lowest cost  in fuel as the years go by.  Good HP but

with the lowest cost.   Second:  The injected engine can be run at

maximum efficiency ie: lean of peak.  The carb engine can not.  So I

traded about 30# extra in the 360 engine for lower operating cost. Next,

I bought the engine with a solid crank so I could not add a constant

speed prop.  My project is at the prop spinner stage. As I finish this up

in the next few days, I will be doing the wings next.  I bought the QB

kit and I have about 1250 hours in it now.  You can look over my build at

www.websites.expercraft.com/jimn  where I have been documenting the

build.  I have my comments about the build both + & - .   So far it has

been a good build.  I expect to have it flying in 3 to 4 months.  Of

course depending on the hurrican season here in florida (St. Petersburg).

        Then again, using the IO 320 is a very good option.  I would do

it with the 150 hp engine and a constant speed prop to get the whole 150

hp. Then again, the cost of upkeep on the constant speed prop has to be

figured in the equasion.  So I went for the simpler fixed sensenich prop

and the low comp. IO 360 with a fixed prop.  Gives me the HP with the

simplicity and few controls.  Does this all make sense?   Its the way I

figured it and went.



Jim Nelson

N15JN

RV9-A

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