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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/16/2012 11:57 AM   
Planejaw


 

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quote:

ORIGINAL: flycolorado

Dave Patrick Super Cub cowl, Yes

SPE, Side carb, Yes, the black rod sticking out is to actuate the choke. I need to shorten that up a bit and finish paining the cowl. Then if someone would only be kind enough to cut up a wing and install flaps so I don't have to blaze new ground...




Colorado,

I'm thinking of putting flaps on my seaplane version. I have to strip the Cub Yellow covering off the wings anyway, as I'm covering them in Solartex. I don't expect to find any significantly difficult structure toward the trailing edge when cutting flaps. Would be helpful to see some photos of a wing that has been cut or damaged, to get an idea of structure and the best place to place a flap servo. But like most airplanes, they're balsa and ply. You can do almost anything with it. Others have put flaps on these wings, I believe.

Particularly on a seaplane, hauling around an extra 5 lbs in floats/servo weight, flaps will help moderate the approach/landing speed. With a DLE-30, probably won't need to use them for takeoff. She'll likely be out of the water before you can get the throttle to wide open anyway.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/16/2012 12:01 PM   
Planejaw


 

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quote:

ORIGINAL: flycolorado

Dave Patrick Super Cub cowl, Yes

SPE, Side carb, Yes, the black rod sticking out is to actuate the choke. I need to shorten that up a bit and finish paining the cowl. Then if someone would only be kind enough to cut up a wing and install flaps so I don't have to blaze new ground...




Colorado,

I am thinking about putting flaps on my seaplane version. Since I have to strip the Cub Yellow covering off of the wings, I thought I'd cut some flaps out and then look for a good place to install a flap servo. Hauling around 5 extra pounds of floats, flaps will help to modulate the landing speed. With a DLE-30 in the nose, they definately won't be needed for takeoff. She'll be off the water before full throttle is reached.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/17/2012 11:15 AM   
SkyPilot101


 

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Flaps?

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/19/2012 7:38 AM   
flycatch


 

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Status: offline 		You and I have one thing in common it's called the "Rudder". Too many people are complaining about the flight characterists of this primary trainer. A real Cub had to be flown using all four flight control systems. It was not designed to be ultra stable, look at the wings they have about one degree of positive dihedral. This plane was one of the primary trainers supplied to military flight schools during WWII and once the student mastered this machine he moved on to the AT-6 or something similar in design.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/19/2012 3:31 PM   
flycolorado



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Status: offline 		Ha Ha, I agree... My first few flights with it were rather daunting I must admit. To make a nice scale right hand turn you have to use right rudder and a little left aileron and of course some elevator. It can be flown with right stick only but it looks like you are flying it with right stick only... I dable with helicopters, you cant even hover one without using the rudder.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/20/2012 11:39 AM   
Planejaw


 

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Status: offline 		I too learned how to fly the rudder at an early age. Then flying helicopters in the 1980's, when mechanical gyros weren't all that great, you used that left stick more than any other control. All but one of my airplanes is a tail-dragger (a 1960's Falcon 56) and you'd better know how to fly using the rudder, not only on the ground, but in the air. I also grew up with early R/C in the 1960's. Had a number of single-channel, rudder-only escapement ships. Back then, all you had was rudder!!!

Amen on the Cub turns with rudder and some opposit aileron. Look at the Sig 1/4 scale Cub...tons of dihedral in that wing and way too much for scale. Makes me sick to see pilots making only aileron turns with their ships and watching the tail slip to the inside of the turn. I also flew full scale for many years..."Step on the Ball!!"

It's interesting to see how many pilots that have a video recorder in their airplanes, pointed to the rear, and you can see that most never touch the rudder. And many wonder how come the airplane veers to the left when rolling down the runway on takeoff. I've seen some very close calls where obstructions or people have been in danger of being struck by an airplane where the pilot does not know how to use the rudder.



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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/22/2012 11:57 AM   
Planejaw


 

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Status: offline 		Assembled my floats yesterday and roughed the installation on the fuselage. A couple holes not drilled/tapped on the angled supports, so drilled/tapped those. Takes a bit of adjusting here and there to get it all installed, but it won't be all adjusted and Lock-Tited until the final installation.

Have to strip the covering off the fuselage and start painting the interior blue, to match the blue Solartex that the fuselage/vertical fin/rudder will be covered in. You can just see the orange wings/horizontal stab/elevators on the wall rack, just above the Yak fuselage. A couple coats of orange Rustoleum will go on the wings, with a couple coats of blue on the fuselage. Still deciding on trim.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/23/2012 11:51 AM   
Planejaw


 

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Status: offline 		Blue Solartex started going on just after taking this photo of the stripped airframe. Always, always use a heat-gun to strip covering. Will not leave any sticking parts of the covering (you know sometimes the top clear layer comes off and leaves the sticky pigment/glue layer behind that is soft and does not peel off at all).

Need to get some acrylic blue paint for the inside of the cabin area.

The Dave Patrick Super Cub cowl came in from Fiberglass Specialties. Very heavy seam on the cowl, will need quite a bit of sanding, then resin and micro-balloons to make it look decent. Not their best quality, at least compared with the dozen or so other cowls I've ordered from them.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/24/2012 5:42 PM   
ZX11


 

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Status: offline 		Look on the Texas Sport web site for trim ideas. The Carbon Cub site also has a variety of trim designs.

I learned on helicopters so I use the rudder. I use it to cross up the cub and do flat turns just for fun on my 25e cub. Hopefully this 1/4 scale cub will have the same light feel in the air. Cubs will always be known for poor ground handling. They have earned the reputation.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/25/2012 12:32 AM   
MetallicaJunkie



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Status: offline 		i just started working on my Cub.... i had a hell of a time getting the standoffs on(dle 30), i have big hands and squeezing my hand through the fuel tank opening was a pain in the ass... i also installed the landing gear, i really like it....i did what i think is going to be the hardest part, the engine.... the rest should be gravy... i hope lol






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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/25/2012 12:40 AM   
bucho


 

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Status: offline 		just to let you know 2 things:

1) GOD is great, HE is the best.

and a far second place

2) the h9 j3 1/4 sclale / os 160 gemini are a GREAT COMBO.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/25/2012 5:33 PM   
ZX11


 

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Status: offline 		Plane jaw, as long as you are recovering it, post pics of the stripped wings, tail, and fuse. They would be handy for anyone else planning modifications.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/25/2012 11:19 PM   
Tx_RcFlyer



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Status: offline 		Anyone else have a problem with the windshield being extremely fragile?  Mine was cracked along the bottom edge so I ordered a new one. New one arrived, it was broken. Called Horizon, they sent out a 2nd replacement and this one is broken worse than the first one they sent. Plan on calling them Monday and see whats up with this.  Looking at the packing job, I think they need to evaluate their packing methods and materials.  Stuffing the windshied in a box just barely large enough and cramming wadded up brown packing paper isn't working, at least not on the two replacements I have received so far.  Seriously frustrated as this has delayed completing my plane for two weeks now.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/26/2012 6:33 PM   
ZX11


 

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Status: offline 		Where are the windshields cracking? Down by the bend to mate with the cowl? Mine is fine but I have read other posts with cracks. I would think that any cracks would be by the complex bend in the wing saddle area.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/26/2012 7:26 PM   
Tx_RcFlyer



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Thats exactly where they are cracking\breaking.

quote:

ORIGINAL: ZX11

 Down by the bend to mate with the cowl? Mine is fine but I have read other posts with cracks.



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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/27/2012 12:12 PM   
Planejaw


 

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quote:

ORIGINAL: ZX11

Plane jaw, as long as you are recovering it, post pics of the stripped wings, tail, and fuse. They would be handy for anyone else planning modifications.

My apologies. I only have photos of the stripped fuselage, as in my last post. Nothing really odd about the fuselage, wings or empennage, in terms of their construction. A little sanding here and there, but overall, the construction is quite good. Nothing flimsy about it.

The fuselage and rudder/horizontal stab/elevators are just about ready for a couple coats of Rustoleum...in Brilliant blue and orange. The stock colors of the Solartex should act as a good primer. Two coats should be needed, but I'll also check on a smaller sample to determine if any primer needs to be considered. I also bought my first "sewing" tool. it's a rotary cutter wheel that cuts the "pinked" edges for reinforcement around corners and to simulate the reinforcement that goes over rib-stitching. A straight-edge and the rotary cutter cuts very nice strips, in any width you choose. I used it around the horizontal stab, elevators, rudder, vertical fin, fuselage, ailerons and over the ribs/leading/trailing edges of the wings. Gives a very "finished" and more scale look to a fabric covering job. If you zoom in on the photos, you can see some of the strips on the fuselage.

Once the fuselage is painted, I'll mount it on the floats and start mounting the servos, DLE-30 and a 20 oz. RotoFlow fuel tank. I didn't take a photos, but I cut away part of the plywood former under the instrument panel, removing the oval cutout for the fuel tank, as well as the two cutouts on either side of the fuel-tank cutout. added a piece of plywood behind the cutout, just under the instrument panel area, to give back a little strength in this area. I'm also adding some tri-stock and epoxy behind the firewall, as the overall firewall construction is not the strongest out there, and the DLE-30 is a little larger of an engine than you'd normally install. Removing most of that fuel-tank former also allows you to get your hands up behind the firewall to install your 5mm bolts for the engine standoffs.

And yes, the windshields regularly crack down near the base. A couple years ago, I ordered a replacement from H-9 and my local hobby shop had to order 6 of them as additional new ones came pre-cracked. Out of the six, I kept 3 that were undamaged. Normal vibration seems to take its toll and cause cracking. I mount my windshields with small screws on the side windshield posts, which will allow for some movement and seems to reduce cracking a little.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/28/2012 11:58 AM   
Planejaw


 

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Status: offline 		Attached is a photo showing the cut-away former underneath the instrument panel. Plywood reinforcement strips on the front face of the material left, to add back some strength to that area.

The photo of the empennage allows you to see some of the "pinked" solartex, over the structure of the tail, as well as around the perimeter. The same was done to the horizontal stab, fuselage, elevators and wing.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 2/28/2012 12:01 PM   
Planejaw


 

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Status: offline 		BTW, as you can see, there is little reinforcement and no triangular stock that beefs up the firewall area. Not a good thing if you're going to be flying with anything larger than a 20 cc engine. I'll epoxy in tri-stock on the sides and bottom of the rear of the firewall.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 3/2/2012 12:04 AM   
MetallicaJunkie



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Status: offline 		is it just me or it a pain in the **** to work on the cub?.... the struts are a pain, installing the servos in the fuse were a pain, mounting the engine was as well..... i just hope it flys well and make it well worth all the effort i put into it.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 3/5/2012 3:34 AM   
MetallicaJunkie



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Status: offline 		Just got back a while ago from maidening my Cub,,,, i must say it one of the most enjoyable planes i have...i flys like a dream and touch and goes are fun! i love seeing the functional landing gear go to work when landing or taxiing ...... 3D/aerobatic flying is my passion, but when im not in the mood, the Cub takes the cake.


DLE30 users.... i tried an 18x10 mejzlik prop on my Cub and wasnt all that impressed by it.... i know a Cub isnt meant to hover, but i briefly tried a couple of times and it had no pull out.... i was expecting a little more since it is overpowered with the 30

what prop is the best , 19x8 Xoar?

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 3/5/2012 4:09 AM   
ZX11


 

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Status: offline 		Did you build it stock or add washout to the wings? Any differential aileron movement? I am trying to decide if I need these for my plane.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 3/5/2012 4:29 AM   
MetallicaJunkie



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quote:

ORIGINAL: ZX11

Did you build it stock or add washout to the wings? Any differential aileron movement? I am trying to decide if I need these for my plane.


i built it stock, and didn't add differential.. i ought to try a mix on my transmitter and put it on a switch so i can go back and forth and compare.... i hear Cubs can benefit from differential.....

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 3/5/2012 12:15 PM   
Planejaw


 

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Status: offline 		I've used Xoar 18X6 props on DLE-30's. Plenty of pull and not too much residual thrust at idle.

I've done quite a bit of work on the H-9 Cubs, so I'm fairly used to working with them. Thought I'd post my two most recent photos. Wings are painted, just need to install the aileron servos and epoxy in the aileron hinges. Painted the struts, those come next, then finishing up the cowl and throttle servo.

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 3/5/2012 3:49 PM   
MetallicaJunkie



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quote:

ORIGINAL: Planejaw

I've used Xoar 18X6 props on DLE-30's. Plenty of pull and not too much residual thrust at idle.

I've done quite a bit of work on the H-9 Cubs, so I'm fairly used to working with them. Thought I'd post my two most recent photos. Wings are painted, just need to install the aileron servos and epoxy in the aileron hinges. Painted the struts, those come next, then finishing up the cowl and throttle servo.



looking good! i like that shade of blue

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RE: Hangar 9 1/4 Scale Piper Cub ARF??? - 3/5/2012 6:11 PM   
Lifer


 

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Status: offline 		planejaw,

I have used 17x6 Xoar's on my DLE 20 and it runs well. In your opinion, does the 18x6 seem to load it down? The application I am considering is the GP PT-17 arf, as yet not test-flown. I am looking for good thrust and a scale speed.

Thanks in advance.

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