What do you think about the tank capacity of 420cc? Is it enough for the 91FX or I need a bigger one?
Also which prop do you think it will be best for the 91FX to pull this model around fast but able to quite slow down for easy landings?

StZ yeah the worlds a small place!
I just scale up or down from previous models rather than actual plans.
Your 420cc tank should be ok unless you run full noise the whole flight.
Think my tank is 380cc but on gas so not real sure on comparison with glo.
For props I run bigger diam. and lower pitch for pull rather than speed, again on gas.
Pick a few of the recommended props for your motor and experiment. ie different diams and pitch.

Hi all,

here are some pics as promised. They are self explanatory.

1) access hatch to the tank and firewall area. The firewall has been covered with a new layer of ply and finish epoxy has been applied for looks and sealing purposes.
2) new landing gear position and reinforcement.
3) servo bay beef up.
4) tank spacer installation to protect tank from getting damaged by adjacent screws.
5) tank properly in position. Also showing the new throttle position for the OS 91 FX.
6) access hatch supports.



More to come soon.

Hay StZ,
Good work and your on your way. I didn't mention it, but I beefed up the servo area too...the light ply... just worked the wood in the kit to much for me, with servo activation.

As Lean-Run stated...I prefer with this type of model, more pull then speed. So I go with a longer prop, and drop down a bit on the pitch. I'm not exactly sure what engine your going to use, so refer to your engine manual and see what they recommend. You can let me or Lean-Run know and we may help you with a good prop choice. But you never know what prop will work the best for your style of flying, so buy several in the prop range for your engine and try them out, until you find the one you like. I use Master Air Screw Symitar style wood props, and Xoar wood blades on my models. I stay away from any plastic or carbon fiber props...for they amputate when your body parts get in the way...wood props brake. All props do damage...but wood does less damage. So as you can see...I only use wood props and that is my personal preference.

Keep us posted,

Soft landings Always,
Bobby of Maui

Bob,

the engine to be used will be an OS 91FX. The starting prop will be 16 x 6. I am using APC at the moment but I might have other brands and types.
Manufacturer recommendation is between: 15x8, 16x6 - 8, for sport flying and 13x11 - 13 and 14x10-11 for aerobatic flying.

However, whilst reading various threads on this engine, a while ago, I compiled the following table with the prop sizes and their respective rpm. The rpm are values that various users have obtained. However it does not take into consideration the different kind of fuel or prop brand being used.

[TABLE="width: 540"]
[TR]
[TD]Prop Size[/TD]
[TD]No of reports[/TD]
[TD="colspan: 6"]Reported top RPM[/TD]
[/TR]
[TR]
[TD]13x6[/TD]
[TD]1[/TD]
[TD]12500[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]13x7[/TD]
[TD]3[/TD]
[TD]12100[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]13x8[/TD]
[TD]4[/TD]
[TD]10400[/TD]
[TD]10000[/TD]
[TD]11800[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]13x10[/TD]
[TD]1[/TD]
[TD]9800[/TD]
[TD]9500[/TD]
[TD]10400[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]14x6[/TD]
[TD]14[/TD]
[TD]10900[/TD]
[TD]10500[/TD]
[TD]10760[/TD]
[TD]12000[/TD]
[TD]11300[/TD]
[TD]10600[/TD]
[/TR]
[TR]
[TD]14x8[/TD]
[TD]2[/TD]
[TD]9100[/TD]
[TD]10400[/TD]
[TD]9500[/TD]
[TD]10200[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]15x4[/TD]
[TD]5[/TD]
[TD]10500[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]15x6[/TD]
[TD]14[/TD]
[TD]10200[/TD]
[TD]10400[/TD]
[TD]9600[/TD]
[TD]10200[/TD]
[TD]9400[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]15x8[/TD]
[TD]1[/TD]
[TD]8100[/TD]
[TD]7900[/TD]
[TD]8900[/TD]
[TD]9000[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]16x6[/TD]
[TD]3[/TD]
[TD]8300[/TD]
[TD]9000[/TD]
[TD]8850[/TD]
[TD]8600[/TD]
[TD]8500[/TD]
[TD][/TD]
[/TR]
[/TABLE]


I hope this table is useful for selecting the right prop for the stik.
Waiting for comments.

With Bob regards wooden props and experimenting for right prop.
The key being "for your style of flying".
While your data table is good, you are "propping" for your model rather than the engine itself.
You could have the same engine in 3 different airframes and may end up with different prop on each.
Pics look good, should be fun flying.