Most props have a varying angle from very steep at the pitch to almost flat at the tips, this is called a helical blade. So they will have a 45 degree angle (not pitch) somewhere along the radius. Key is what radius the 45 degree angle is as this helps define the pitch. (Pitch is the theoretically ideal distance the prop will move forward during one turn, not an angle of the blade).<SNIP>
- Does the "broad" ikara prop come stock with pitch greater or less than 45 deg?
- for the Leading Edge kit, what is(are) the recommended rubber size(s) for this prop/plane combination?
Carbon fiber does mean carbon reinforced polymers, like this, right?<SNIP>
For the large ikara prop, I know that a wider rubber is needed. We recently tested with a .093 rubber and got close to 2:30. I was wondering if others have experience using such a big prop with narrower rubber like .090 or .085 to increase flight times.
The plan is recommending the 45 degree angle be at a particular radius to give a particular pitch.
Never flown this plane, but from experience, it should be in range of .070 to .096 width. That's a very wide range I know, but it should be in there somewhere.
How much have you played with wing incidence or stabilizer incidence to see how it affects the flight and time?I'm not sure where to go from here. My planes specs are:
12.75cm chord wing
2 dihedral points with a middle portion 24 cm long and the tips angled at 20 degrees
Also I'm using the 8-7/8in Ikara prop with .090 rubber with 90 winds (1350 turns).
It got just under two minutes and I really don't know how to improve. My WS mentor was with me when I flew, and he didn't really know where to go either. All he could suggest was ruby bearings for the propeller.
The basic plane you have should be capable of more. And two minutes is very respectable.<SNIP>It got just under two minutes and I really don't know how to improve. My WS mentor was with me when I flew, and he didn't really know where to go either. All he could suggest was ruby bearings for the propeller.
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