Wright Stuff C

[klastyioer]

K,

So, you know about this, but the FF kit prop pitch is not helical. The pitch quoted above by J of 30 degrees at 75% radius (about 3.5” radius) is a 12.7” pitch. The average pitch at 2.1875” radius of the fouw propellers I measured just now is 11.53”. Not a big deal as most props awe not truly helical; just good to be aware of.


Brian T

gotcha ty

[coachchuckaahs]

Since I am mentioned, I gotta say: Count the remaining winds!

This is an important part of your data, and tells how well the rubber is matched. If zero, rubber is too strong.

As a shortcut, we tend to indicate remaining turns by how many knots are remaining, in terms of fraction of a row. For example, 3/4 row of knots, or 1, or 1+ if a few secondary knots show. We occasionally do an unwind to correlate, but determining the fraction of knot row(s) remaining at least points us in the right direction.

One rule of thumb I have seen is the remaining turns should be about the same as your unwinds.

It is not uncommon to have a full row of knots, which may be 300-400 turns, depending on your rubber and hook length.

Coach Chuck

[Unome]

I had a nice explanation that I typed, but some software error in this website inserted lots of spelling errors. So I deweted the same.

Short answer - never braid a WS rubber motor.

Braiding of rubber motors is only used with outdoor models to prevent motor bunching and CG shifting.

its not a software glitch its an apwiw foow pwank on Sciowy.owg lmao

The original text is still there, it's a filter program. Everything will look normal again once the filter is turned off.

[Rossyspsce]

Anyone know of cheap rubber strippers or how to strip rubber without one

[bjt4888]

Rossy,

Unfortunately, there aren’t any cheap alternatives for rubber stripping. It is a significant advantage to have this tool once you get good using it.

I have used a Harlan stripper for quite a few years and it works great.

Brian T

[coachchuckaahs]

Rossy:

Cal wrote some time back this year in this topic about a home-made rubber stripper, viewtopic.php?f=299&t=12123&p=368820&hi ... er#p368820

While not as sophisticated as the commercial strippers, it is far cheaper. Just be sure to get rubber at least 25% wider than your target, as this stripper cannot take off thin slices.

I have not tried this, but it is worth a shot.

Coach Chuck

[klastyioer]

Anyone know of cheap rubber strippers or how to strip rubber without one

i thought i saw some online like on ebay thatre used but idk if theyre much cheaper
investing in one however is like a rly good choice cause then you can customize your rubber thickness at your own will
also if you dont have one you can just like custom order sizes off of ff's website which is kinda expensive ngl i was looking back at some old heli orders my team made when we broke our stripper and were waiting to get a new one and it was 4 custom thicknesses for like 30 something dollars which is nearly as much as a 1 lb box of rubber sooooo
itll save you money in the long run to just buy one now
try to get your teammates to chip in to buy one if you have 20 ppl on ur team just make each pay 10 bucks

[sciencegirl03]

K,

I measured four of the FF kit propellers that we have lying around and they range between 38 and 42 degrees pitch as measured using the FF pitch gauge. My version of this pitch gauge measures at 2.1875” radius.

Brian T

Most of the props I have measured with the FF pitch gauge measure around 32/33 degrees. I know the recommendation is to increase pitch. Does that mean try even greater than 40 degrees? 50 would be too close to vertical.

[coachchuckaahs]

I would try increasing a little at a time, and at some point your times will start coming back down, and you have found an optimum for your plane. But, remember, as the prop pitch goes up, you will also want to optimize the rubber width, if possible.

Note, if you only have a single or limited selection of rubber width, then you want to optimize the pitch for that rubber width.

Data will tell you when to stop.

And, no, over 40 may not be "too much", depending on your plane, trim, and the prop (I assume you are talking about the non-flaring prop?)

Coach Chuck

[sciencegirl03]

I would try increasing a little at a time, and at some point your times will start coming back down, and you have found an optimum for your plane. But, remember, as the prop pitch goes up, you will also want to optimize the rubber width, if possible.

Note, if you only have a single or limited selection of rubber width, then you want to optimize the pitch for that rubber width.

Data will tell you when to stop.

And, no, over 40 may not be "too much", depending on your plane, trim, and the prop (I assume you are talking about the non-flaring prop?)

Coach Chuck

Yes, we're working with non flaring props. So far we've only gone to 40 degrees. Will increase more next.
Thanks!