RE: Dave Patrick super cub
 

Some info on mine...I've been off the forum for awhile, just catching up. Flew the maiden flight on Sunday, flew like a champ..I mean a Cub!..One click of up elevator and it was hands off. I have a brand new OS 160 twin in it and it started right away and idles at 1100 RPM and revs up to 7300 on an 18-6 Zinger, right out of the box at the inital needle valve setting! I think the OS 160 twin is the finest engine in the hobby. I originally planned a Saito 182 twin, but those twin carb needle valves through the top of the cowl and awkward firing order turned me off.
The cub weighs 16.5 lb with no balance weight needed. It has a EDR 103 glo driver and battery under the fuel tank, and Rx and 6 volt Nimh flight battery, Hitec 645 servos on rear cockpit floor as per plan. I made some simple seats and lined the cockpit and aft compartment with vynyl material from WalMart. I mix 20% rudder with airilon, no differential. The throws were set up as per instructions, right on, maybe a little much on airilion at the high rate setting. Plenty of power, 1/2 flies it realistically. Super stable in landing approaches, flares and touches down like a feather. I am really liking this airplane..great to build a dream to fly. You wont be disappointed!!

RE: Dave Patrick super cub
 

Some Pix..
Hanging on the balance wires, cockpit detail

RE: Dave Patrick super cub
 

whoops

RE: Dave Patrick super cub
 

Sounds great Ric, what happened to the pix?
He,He, Never mind.

Bud

RE: Dave Patrick super cub
 

Looking good Ric! I see you closed your interior back end in similar to what I did, very nice.

Bud

RE: Dave Patrick super cub
 

:eek: GUYS ,did your struts ends at the fuze line up ok? my left wing panel jury strut is almost wound clear out yet my wing is flat and the strut, rearmost , isnt even with the front strut , maybe have to call dave? thanks JIM

RE: Dave Patrick super cub
 

Ray,
Sounds like you're all wound up and you should be :) you're gonna really enjoy this cub.
As for a building time....someone beside me should answer that. I tend to build very slow (especially on kits) I'd almost rather build than fly so I take my time. It's such a well designed plane you should have no problem, the engine mounting takes the most time but the rest just falls in place if you follow the instructions. Who had the ad for an interior?


Builder Jim,
Are you sure you don't have the front and rear lift struts reversed? My front measures 27 3/4" (just the streamlined strut without the screw ends) and the rear is 28" That 1/4" difference may be your problem if they are reversed?
Just looked at your post again and you said your struts don't line up, maybe your jury struts are reversed? the rear is 5.1" long and the front is 4.7" maybe that's why you had to unscrew the lift strut so much. Would also make your lift struts not line up. Just a thought from my feeble mind this morning but then I haven't had my second cup of coffee yet. :D

Bud

RE: Dave Patrick super cub
 

Bud,

The interior kit was listed in the Toledo 2005 review in R/C Report (pg 70, June 05 issue) says it fits over the servo tray. It is available from Dynamic Balsa, and includes two seats, instrument panel, both side panels, the cargo shelf behind the rear seat, floor, sticks, and rudder pedals. Price listed says it is "about $100".

Ray

RE: Dave Patrick super cub
 

Well here's the latest thing to add. Will have to rework the cross braces to fit or mount to side of supports, undecided if I should I mount it up or inverted if I mount it here.

RE: Dave Patrick super cub
 

Bud,
I vote for the Canoe to be inverted. Would not collect exhaust residue and would be more aerodynamic.

looks like your getting near the end of the rainbow.

Pete

RE: Dave Patrick super cub
 

I'm kinda leaning that way Pete. Gonna rebuild my crossbraces maybe this weekend. I'll get this thing finished eventually.

RE: Dave Patrick super cub
 

Well I have been paddling a canoe in moderate white water with wife child and friends for 30 years. I store it inverted under our deck and I carry it on top of the van inverted. Once I put the canoe on a trailer for a Hobbie Cat sail boat inverted. When a canoe fills with water its VERY heavy so any one who paddles knows to keep it inverted when not in it. Sometimes it becomes inverted while your in the canoe but we will not go there[:@]


Looks Great!!!!

Carl

RE: Dave Patrick super cub
 

He,He....been there...done that. Thanks Carl.

Bud

RE: Dave Patrick super cub
 

:DBud, thanks for the reply, been busyer than a one armed paper hanger, will measure everything this week end, Ive followed the directions to the letter, but maybe just maybe Ive managed to reverse those, yours and the others are really looking nice, luv the canue. thanks builder JIM

RE: Dave Patrick super cub
 

All right bud have a question or two on the operation of a plane with floats. As you might know my dad (builder jim) has 2 DP cubs and and I kinda tryed to have him make one a float plane! Yet, he doesnn't fly but only builds. So I need from you some tips on flying off water instead of land but do realize that the maiden should be off land first and then water. Any help would be appreciated thanks.


Jon

RE: Dave Patrick super cub
 

Hi Jon,
How the heck do I know...I just build em. :D :D :D
I'm with you Jon, we have an 8 acre pond our club uses and I've always loved float planes but have never flown one. When I joined the club and saw the pond I decided I had to build one.
One of the guys on several forums does fly floats and likes to tease me about not finishing my BUSA cub, I've seen pictures of his float planes and i'll track him down and ask him to visit this forum and help you with some answers. He usually hangs around the seaplane forum. I think he may have visited this forum too. Hey Nony....HELP! I will maiden mine on wheels first and then when my flying buddy from Canada visits again (he also flys floats) I'll have him do the float maiden and give me some help. So...in otherwords....I'm a float newbie. ;) Did builder jim get his strut problem worked out?

Bud

RE: Dave Patrick super cub
 

Geee....who would that be ???

Best place to get answers is in the seaplane forum. There are some rules for setting up a floatplane, but I have seen most of them broken to the extreme, and the planes still fly. The trick is to get a middle-of-the-road setup that will fly, then tweak it from there.

The first consideration is the location of the float step in relation to the cg. I like to have mine in the exact same place as the wheel contact point (for a taildragger)...some folks prefer it farther back than that. Too far back, or too far forward and you will run into handling difficulty on the water at speed..I'll get back to this in a moment...

The second consideration is the angle of the floats relative to the wing. (I have seen wild variations on this theme). The bottom line is that with floatplane resting on a flat surface, with the step and the heel of the float touching the surface, an incidence meter on the wing should give you 7 degrees positive incidence.

Once you have these 2 variables nailed down, you will have a plane that will take off, and fly. (if the floats are the right size).

Now the floats can be considered to have 2 separate sections- the part ahead of the step, and the aft part behind the step.

The only function of the front part of the float is to support the model through boyancy when it is at rest or at very slow speed (taxiing) on the water. Except for this phase, we want the front part of the floats out of the water at all times.
The next speed range (on water) is the moderate range. Here we want to replace the floatation boyancy of the front of the floats with hydrodynamic lift from the aft part of the floats. This is done by holding full up elevator and adding power. At this point, the floats are plowing a lot of water until speed builds up.
As the speed of the plane increases, hydrodynamic lift increases, meaning less of the rear part of the float is required to be in the water to provide the same amount of lift. We ease up on the elevator, which allows the nose of the model to drop a bit, and allows the model to accelerate even more, meaning less and less of the float surace is required to be in the water to support the model (at this point the wings are beginning to supply some lift).
At high speed, the model is going to be running in a fairly level attitude, and only a very small part of the float, just ahead of the step is actually touching - both the nose and heel of the float are clear of the surface of the water...this is what is called being "on the step". As water drag has been greatly reduced, the plane accelerates to flying speed quickly and a gentle rotation (back elevator) will allow the wings to supply the lift required to rise from the surface. (this is where the 7 degree positive incidence fits in...giving you room to raise the nose attitude withough having the back of the floats hit the water again.) The technique is very similar to flying a taildragger from land.

Now back to the step position...if the step is too far back, or too far forward, the plane will be riding on more on the front part of the float at high speed..this can lead to directional instability and waterloops. depending on the model, having the step about 1/2" or so behind the cg seems to work well.

If the model starts porposing on takeoff, abort, taxi back and try again.

Landing is easier....most planes require a bit of power due to the extra weight and drag of the floats. aim to touch down with the back part of the floats first. The drag of the water will rock the model forward, reducing the angle of attack of the wings, reducing lift. If it should bouce, it will settle back quickly. If you touch down with the front part of the floats, it is similar to landing nosewheel first on a trike, and the results will be similar.

Good luck!!

RE: Dave Patrick super cub
 

Thanks for the help Nony,
Best description i've heard in a long time. BTW.....I think congrats are in order, geez...what are you gonna do with your time? :D

Bud

RE: Dave Patrick super cub
 

Thanks NONY for your time in this matter. Will be looking in the seaplane category for further questions.

RE: Dave Patrick super cub
 

Hey Jon,
Just noticed you're in Clarksville. Had an army recruiter come in the bowling alley last week who has a house there and can't wait to get back. I've been there several times while my son was at Campbell. Screaming eagles 7th aviation chinooks. 5 years there. Nice area.

Bud

RE: Dave Patrick super cub
 

You're welcome guys.....

Believe it or not, I'm heading out to a float fly - a big one!!!

RE: Dave Patrick super cub
 

He,He, I kinda figured as much. Ain't it nice you don't have to rush home to get back to work?

RE: Dave Patrick super cub
 

Well not for paid work anyways...I have a long, long list of projects and honey-do's to keep me going most of the summer....

RE: Dave Patrick super cub
 

:eek:BUD, could you help me with the painting of ultraoat? Ive got the three m striping tape in different widths, and three m sanding pads, and after reading this thread again understand that you use lustercoat for painting, maybe the rattle can? what was your procedure? thanks for info Builder Jim

RE: Dave Patrick super cub
 

Hi Jim,
I forgot what brand tape I used but I got it at the hobby shop and it was red and 1/8" wide. I taped my pattern first and then ran masking tape with my paper (I bought a roll of the brown paper from an automotive paint shop) just overlap the red about halfway. I cleaned the area to be painted with alcohol but didn't sand. I did use lustrekote but found it doesn't like ultracoat....it chips. That's why next winter i'll recover mine in super coverite and do it right. The rattle cans are fine if you do light coats to build up. Some people use rustoleum but my preference in cans is krylon. Best spraying can paint i've ever used, I think it's under $3.00 at wal mart. Lustrekote is a very heavy spray. I know they make a spray can paint for ultracoat but don't know where to buy it or how easy it is to spray. My preference is PPG with a gun and I have three guns including a new HVLP i've yet to try but the lazies got me when I painted my cub. I'll correct that when I recover in coverite. Let me know if you need any more info.

Bud

RE: Dave Patrick super cub
 

[:o] BUD THANKS FOR QUICK TURN AROUND. WELL THATS WHAT I THOUGHT ABOUT LUSTERCOAT, ive expermented with the new fusion from rustolium will stick on but still will chip if you tape over it, or wad it up not that happens on my planes, but it does stay on better than most paints . some of the folks here has a proven method?yes ive found my problem with the struts. must I bare all here for the world to here? and I guess Ill be looking into a float set up. hum thanks jim

RE: Dave Patrick super cub
 

Jim,
I've heard somewhere Dave Patrick is working on floats for this plane.

RE: Dave Patrick super cub
 

[:o]NO NO NOT ANOTHER PROJECT THAT REQUIRES A WHOLE BUNCH OF LEARNING. NO JUST KIDDING MIGHT BE FUN TO DO JUST DIFFERENT THAN IAM USE TO BUILDER JIM

RE: Dave Patrick super cub
 

BUD

I was also with the 7th Dc.

I just got out of the army three weeks ago and also own my home here.

Nice area but looking forward to Ohio.

RE: Dave Patrick super cub
 

Jon,
Now that's a coincidence....Jeff was 7th Cc. He went in in '88 and got out in '93 spent the whole time there except for his training at Ft Eustis. Was in the first gulf conflict. Think his tail # was 384. He painted "have guns will travel" on the fuse while over in Saudi. He keeps up with some friends he served with on a chinook website.

RE: Dave Patrick super cub
 

Any of you guys with DP Super Cubs have any video you could post? I would especially appreciate video of the OS 160 twin in action. Thanks.

RE: Dave Patrick super cub
 

Hello Phil.

I'm currently researching a 1/4 scale build of an L21. Can you advise how/where you gathered the documation for yours?

Thanks...

RE: Dave Patrick super cub
 

I'll be happy to post a video clip when I can. I have my OS 160 FT, Keleo headers, on board glow, Futaba flight pack w/coreless metal gear bb servos....everything except the plane. I've been promised the kit this month....getting a little ansy[:o]. I plan on videoing the maiden flight.

Question: I bought 18-6 props for this cub-OS 160 FT set-up and the hobby shop owner said I was nuts....too much prop. I'm confused about that because this is the prop Dick Pettit used in his article. The store owner told me to stick with 16-6 or 15-8 since the OS 160 twin is not that powerful (his words). I went ahead and bought the 18-6's anyway. I already have a stash of 15-8s for my 120's. Any comments?[sm=confused.gif]

RE: Dave Patrick super cub
 

Stick with the 18-6

Bud

RE: Dave Patrick super cub
 

Some pics of the float fly, if you guys are interested..lots of big scale planes there !!

http://fubarhill.com/gallery/view_al...umName=Shuswap

RE: Dave Patrick super cub
 

NONY, nice pics, thanks for sharing builder jim

RE: Dave Patrick super cub
 

Thanks for sharing nony, hope you had a great time. I just finished reworking my cross bracing so the canoe will fit now I have to mount the canoe with a scale strapping and then start on the water rudders hookup [X(] haven't a clue there, but want to use pulleys....guess i'll get out my proctor catalog.

RE: Dave Patrick super cub
 

Are you using one water rudder or two? are they going to be retractable??

RE: Dave Patrick super cub
 

I'm using two retractable rudders from ernst.

RE: Dave Patrick super cub
 

I have a set of floats from a byron husky, and I believe they have a fairly detailed explanation of how to set up the water rudders....It will take me a few days to get to it though as I am going out of town.......although, at your rate of building, that should not be an issue [>:]:D:D:D:D