db1yg
Well Known Member
From the immortal words of Ricky Ricardo--"Splain this to me Lucy!"!
The request for an "explanation" is due to the fact that I am considering the move from my fixed pitch propeller to a Whirlwind RV200 c.s. unit. The complicating factor is that I have a "long" Sam James cowl which, with my fp propeller, requires a 4" vs a 2 1/4" propeller extension. So--my cowl is 1 3/4" longer than the current stock Van's cowl. Now, when I call Saber Manufacturing (who made my extension and hundreds for the folks on this forum) they tell me that I need a 2 1/4" by 6" prop extension for the cs Whirlwind----huh??? Why would I need a 2 1/4" extension when my cowl is only 1 3/4" longer than stock and when no extension is necessary when going to the cs prop when equipped with a stock Vans cowl?. Response, that is the way it works out given the hub shape.
Now, I do not doubt this to be true as Saber has been making extensions for a very long time--I just do not understand why I would not need a
1 3/4" extension vs a 2 1/4" extension.
Can anyone "splain" this to me??????
Puzzled in Prescott,
Cheers,
db
The request for an "explanation" is due to the fact that I am considering the move from my fixed pitch propeller to a Whirlwind RV200 c.s. unit. The complicating factor is that I have a "long" Sam James cowl which, with my fp propeller, requires a 4" vs a 2 1/4" propeller extension. So--my cowl is 1 3/4" longer than the current stock Van's cowl. Now, when I call Saber Manufacturing (who made my extension and hundreds for the folks on this forum) they tell me that I need a 2 1/4" by 6" prop extension for the cs Whirlwind----huh??? Why would I need a 2 1/4" extension when my cowl is only 1 3/4" longer than stock and when no extension is necessary when going to the cs prop when equipped with a stock Vans cowl?. Response, that is the way it works out given the hub shape.
Now, I do not doubt this to be true as Saber has been making extensions for a very long time--I just do not understand why I would not need a
1 3/4" extension vs a 2 1/4" extension.
Can anyone "splain" this to me??????
Puzzled in Prescott,
Cheers,
db