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  • August 13, 2022, 02:33:04 PM

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Author Topic: pathfinder LE building  (Read 2462 times)

Offline fred cesquim

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pathfinder LE building
« on: March 21, 2022, 04:25:20 AM »
i was gifted this great RSM kit from a friend, and started yesterday, so far so good
will be e-powered
one balsa rib sheet was missing and a surplus ply reinforcement rib sheet came as a surplus, i bet someoneīs have the inverted situation
fortunately i had one of each missing ribs to make a copy

Online Motorman

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Re: pathfinder LE building
« Reply #1 on: March 21, 2022, 09:34:13 AM »
Nice gift!

Online Jim Hoffman

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Re: pathfinder LE building
« Reply #2 on: March 23, 2022, 02:20:00 PM »
I had missing parts (entire wood set for Stab and elevator) in a Brodak kit about two years ago.  I called the factory and they made it right by sending me the pasts needed

Offline fred cesquim

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Re: pathfinder LE building
« Reply #3 on: March 24, 2022, 04:46:44 AM »
I had missing parts (entire wood set for Stab and elevator) in a Brodak kit about two years ago.  I called the factory and they made it right by sending me the pasts needed
i am pretty sure RSM would do the same, but as i live in Brazil i opted to cut the missing ribs myself and save them the trouble
had to stop the building for a while, doing a cockpit for a 1/4 scale focke wulf that took most of my workshop space

Offline fred cesquim

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Re: pathfinder LE building
« Reply #4 on: April 18, 2022, 01:37:16 PM »
finally made some progress
tail needs airfoil shape sanding
have changed nose design for e-power. cowl is not needed anymore, and iīll insert engine form the nose, and battery via a side window. I ended up with a "curare" (70īs famous F3A plane) nose profile.
also shortened the fuse widht about 1/2 all the way as no pipe will be used.

Offline fred cesquim

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Re: pathfinder LE building
« Reply #5 on: April 18, 2022, 01:44:35 PM »
wing was built within 6 hours tahnks to the clever jig design.
i was skeptical with the 1/4 x 1/8 balsa longerons, but after adding the short ribs everything is safe and strong. my admiration for Gordonīs design, really light and clever
only deviation from the kit: they send balsa to make a molded C full leading edge sheeting (just like the thundergazer). i really have my doubts if thatīs good and that glue will properly reach every spot. instead of doing that ( wich is a lot of extra work too) i have cut a new LE spar 3/32 wider and had a 1/16 extra lip on the ribs LE. this lip sits on my alluminium JIG. then i glue the sheeting on the lip with CA ( sheet 90 degrees to the spar). moisten the shee with windex, apply titebond to the ribs and run CA to the central longeron, folds the (now pliable) sheeting over and attach to the spars. no need to clamp or pin, and you finish within minuts. this way the glue reaches every point of contact of wood and you ended up with a warp free wing.

Online Motorman

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Re: pathfinder LE building
« Reply #6 on: April 18, 2022, 04:19:58 PM »
You would have to make a foam leading edge buck to mold a full clam shell for the leading edge. The (rsm) kit kind'a leaves you hanging in that respect. I've seen other (rsm) builds on here for Thundergazer ect and the builder always engineers a way around that problem. Glad you worked it out. My solution was to sell the kit.

Motorman 8)

Offline fred cesquim

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Re: pathfinder LE building
« Reply #7 on: April 18, 2022, 05:50:24 PM »
You would have to make a foam leading edge buck to mold a full clam shell for the leading edge. The (rsm) kit kind'a leaves you hanging in that respect. I've seen other (rsm) builds on here for Thundergazer ect and the builder always engineers a way around that problem. Glad you worked it out. My solution was to sell the kit.

Motorman 8)
the kit comes with LE templates and instructions to do that, i just donīt think itīs a good method at all, same with thundergazer. i came with this solution while building the Tgazer and since then all of my planes uses the same technique for sheeting LE. with this method you donīt need to shape LE anymore ( a thing that i hate and know itīs paramount for good tracking)
wingīs almost done now
regards bro brazil

Offline fred cesquim

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Re: pathfinder LE building
« Reply #8 on: April 18, 2022, 05:53:32 PM »
hope pictures show how it works

Offline fred cesquim

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Re: pathfinder LE building
« Reply #9 on: April 29, 2022, 02:51:33 PM »
wing is ready
fuselage is next

Offline fred cesquim

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Re: pathfinder LE building
« Reply #10 on: April 30, 2022, 07:48:18 AM »
fuselage stuffing

Online Brent Williams

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Re: pathfinder LE building
« Reply #11 on: April 30, 2022, 10:48:13 PM »
What size motor and battery do you plan to run?
Laser-cut, "Ted Fancher Precision-Pro" Hard Point Handle Kits are available again.  PM for info.
https://stunthanger.com/smf/brent-williams'-fancher-handles-and-cl-parts/ted-fancher's-precision-pro-handle-kit-by-brent-williams-information/

Online Ken Culbertson

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Re: pathfinder LE building
« Reply #12 on: May 01, 2022, 08:13:10 AM »
wing is ready fuselage is next
Nice weight.  What kind of scale are you using,  I need one that gives me lighter wings! LL~

ken
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USAF 1968-1974 TAC

Offline fred cesquim

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Re: pathfinder LE building
« Reply #13 on: May 02, 2022, 04:00:31 AM »
Nice weight.  What kind of scale are you using,  I need one that gives me lighter wings! LL~

ken
golden trick to do is: block up wing tips with foam pads while using the scale   ;D ;D

Offline fred cesquim

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Re: pathfinder LE building
« Reply #14 on: May 02, 2022, 04:04:12 AM »
What size motor and battery do you plan to run?
tempest 3515 740 KV , fiorotti timer and 6S battery (but i will test a 5s) .

Offline fred cesquim

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Re: pathfinder LE building
« Reply #15 on: May 03, 2022, 07:26:58 AM »
fuselage is halfway through
easy and fast to build

Online Motorman

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Re: pathfinder LE building
« Reply #16 on: May 03, 2022, 02:30:31 PM »
Have you calculated a path for the cooling air?

Offline fred cesquim

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Re: pathfinder LE building
« Reply #17 on: May 03, 2022, 04:40:03 PM »
Have you calculated a path for the cooling air?
guesswork will start after shaping the nose. ;D
my previous 3 planes had similar nose, so probably will follow the same route
any advice on that? i plan to do something like the starduster

Offline fred cesquim

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Re: pathfinder LE building
« Reply #18 on: May 09, 2022, 11:00:45 AM »
nose done

Offline fred cesquim

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Re: pathfinder LE building
« Reply #19 on: May 12, 2022, 05:31:35 PM »
just need to open ventilation holes and add a wing to the fuselage

Offline Crist Rigotti

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Re: pathfinder LE building
« Reply #20 on: May 12, 2022, 08:54:24 PM »
Sweet!
Crist
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Offline fred cesquim

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Re: pathfinder LE building
« Reply #21 on: May 13, 2022, 05:04:50 AM »
Sweet!
thanks Chris, canīt wait to add wing/tail and see how she looks
regards from brazil

Offline John A Miller

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Re: pathfinder LE building
« Reply #22 on: May 15, 2022, 07:55:49 PM »
Nice job. I think it'll be a looker when you finish it and start flying it. You might be surprised how n ice i flies.

Here're a few pics of mine at Brodaks'.

Offline fred cesquim

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Re: pathfinder LE building
« Reply #23 on: May 16, 2022, 04:17:10 AM »
Nice job. I think it'll be a looker when you finish it and start flying it. You might be surprised how n ice i flies.

Here're a few pics of mine at Brodaks'.
thank you
lovely plane of yours!
really liked the tainted cockpit!

Offline fred cesquim

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Re: pathfinder LE building
« Reply #24 on: June 04, 2022, 06:38:21 AM »
now itīs progressing fast
next is turtledeck and tail fit

Offline fred cesquim

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Re: pathfinder LE building
« Reply #25 on: June 07, 2022, 05:04:12 AM »
she looks good!

Offline fred cesquim

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Re: pathfinder LE building
« Reply #26 on: June 20, 2022, 04:05:35 AM »
bare bones with wheels weight, ready to star finishing process

Offline fred cesquim

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Re: pathfinder LE building
« Reply #27 on: June 20, 2022, 04:07:09 AM »
made a fiberglass canopy ( will be painted) and saved some 10 grams
just need flap/fuse fairings and will start dope/carbon veil on fuse and monokote wing/stab

Offline fred cesquim

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Re: pathfinder LE building
« Reply #28 on: June 21, 2022, 03:58:18 PM »
brodak superfill time

Offline wwwarbird

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Re: pathfinder LE building
« Reply #29 on: June 21, 2022, 09:35:19 PM »

 Fillets before covering?
Narrowly averting disaster since 1964! 

Wayne Willey
Albert Lea, MN U.S.A. IC C/L Aircraft Modeler, Ex AMA member

Offline fred cesquim

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Re: pathfinder LE building
« Reply #30 on: June 22, 2022, 04:52:26 AM »
Fillets before covering?

yes, monokote will stop before the blue tape and fuse will be painted. so paint will cover the fillets and 1" of wing with a 1/4 overlap over monokote

Offline fred cesquim

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Re: pathfinder LE building
« Reply #31 on: August 05, 2022, 03:56:08 AM »
after some hiatus, finally monokoting
i had monokoted the wings before, bit the product was strange, not performing like used to, and had some color flaws....i gave up, stripped everything and bought a new fresh roll. worked perfectly.
looks like someone put a prank on me and sold me chinakote instead before...or just a bad batch of product
next is carbon veil on fuselage, but vacations is near, iīll be back next month


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