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FTFC19 - April Showers by Kilroy07 - Polaris

kilroy07

Well-known member
#1
Okay, Foamy jeered me into it! :LOL:

"Let's do this!"

The Polaris has been hovering around the bottom of my build list for awhile now.

It seems to be a very popular design, or at least it used to be.
And apparently usually made from depron (Which... I don't know, can we even get it here in the states?...) :unsure:

Anyway I've found several examples of plans;
https://www.rcgroups.com/forums/showthread.php?922465-Polaris-Seaplane-Parkflyer
and FT even did a video of them back in the day!
https://www.flitetest.com/articles/modelaero-showcase
I even founds plans on parkjets (surprised my account was Still valid, must have opted for the year long membership.
http://www.parkjets.com/

But in all cases (At first glance the parkjet plans are just a reprint of the RC group plans...) they don't seem to be for DTFB...
So I think I have some work to do on the plans as I pull them in CAD to make the laser cut files... So there isn't going to be pics of build progress anytime soon.

My plan is to go ahead and use DTFB and minwax it (unless someone stateside knows where I can get depron for a decent price....)
I also plan on using the white (foaming) gorilla glue. this will add to the build time, but I think the strength, lightness and water tightness will be a benefit.

So, more as this project progresses... (Stay tuned.)
 

Vimana89

Active member
#10
Okay, Foamy jeered me into it! :LOL:

"Let's do this!"

The Polaris has been hovering around the bottom of my build list for awhile now.

It seems to be a very popular design, or at least it used to be.
And apparently usually made from depron (Which... I don't know, can we even get it here in the states?...) :unsure:

Anyway I've found several examples of plans;
https://www.rcgroups.com/forums/showthread.php?922465-Polaris-Seaplane-Parkflyer
and FT even did a video of them back in the day!
https://www.flitetest.com/articles/modelaero-showcase
I even founds plans on parkjets (surprised my account was Still valid, must have opted for the year long membership.
http://www.parkjets.com/

But in all cases (At first glance the parkjet plans are just a reprint of the RC group plans...) they don't seem to be for DTFB...
So I think I have some work to do on the plans as I pull them in CAD to make the laser cut files... So there isn't going to be pics of build progress anytime soon.

My plan is to go ahead and use DTFB and minwax it (unless someone stateside knows where I can get depron for a decent price....)
I also plan on using the white (foaming) gorilla glue. this will add to the build time, but I think the strength, lightness and water tightness will be a benefit.

So, more as this project progresses... (Stay tuned.)
Now that is a cool plane. I was just thinking about nacelle mounted tractor props. What's the rule of thumb for thrust angle on a setup like that?
 

kilroy07

Well-known member
#11
Now that is a cool plane. I was just thinking about nacelle mounted tractor props. What's the rule of thumb for thrust angle on a setup like that?
As I understand it, since the thrust line will be above the cg line, it need some down thrust. I believe that is already accounted for in the original plans.