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Published by gzsfrk
02-07-2008 |
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#2
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Great review!
And from reading this, I wouldn't buy one. But great review none-the-less. We do have a seaplane forum here on WF. I'd hate to see all this work get buried here in the General Discussion thread. Maybe the Mods can move it for you? Frank
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Model Aviation Mentors. Helping Others Grow/Learn. |
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#3
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Wow, excellent report. Putting me right between wanting one, and not...
![]() It looks far from watertight, I would certainly seal those electronics.
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Self proclaimed dictator of the Flite Test fan club. |
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#4
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Originally Posted by FlyingMonkey
Yeah, that and before I put it in the water, I'm going to have to come up with a better way to seal the canopy. I imagine it would be alright if you were sure that you weren't going to crash it in the water, but that's certainly far from a given at this point.
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- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
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#5
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Yes, I considered putting it there. But I figured the sea plane forum probably doesn't get much traffic, whereas it would likely get more activity and views here in General.
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- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
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#6
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This is one of the better reviews I have seen here. Although the plane does have the 'cool look' to it. To bad they skimped on quality. I'll be looking forward to your flight review. Are you flying this off water, wet grass, snow?
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#7
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Originally Posted by aviatordave
Soccer field sod is my planned first attempt. I maidened both the Wild Hawk and J-3 Piper there, and the damp turf seemed to absorb the planes pretty good on the occasional less-than-stellar landing.
![]() I do hope to make it to water eventually. However, as FM pointed out, it will require some waterproofing before then.
__________________
- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
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#8
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and FM has the solution....
HOT GLUE!!!! It is already plastic wrapped, seal the ends with hot glue, then put some hot glue on top of that, just to be sure!
__________________
Self proclaimed dictator of the Flite Test fan club. |
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#9
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hmmm, for sealing the canopy....
You wouldn't want anything permenant, it doesn't have to be water tight, just water resistant, if you hit the water hard enough to go under, you're breaking the foam anyways. What about some of that tacky glue, like they use to put the ads in magazines these days? I bet they sell something like it at Staples, or Office Depot.
__________________
Self proclaimed dictator of the Flite Test fan club. |
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#10
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Excellent review... I have a weak spot for PBY's.. I was thinking about this one, but didn't want another RTF (another junk radio). Too bad the execution on this one seems so bad (54" wingspan and not detachable??? <grrrr> ) Maybe if they sold an ARF version for under $50 I'd be sold... I guess I blew it by not picking up the Hobby Lobby Cat while it was available... <sigh>
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#11
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This is why he will never be a writer for a magazine, and why I read forums instead.
Great review, honest and informative, I like the idea of the plane, but the bad might outweigh the good in this case.
__________________
Self proclaimed dictator of the Flite Test fan club. |
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#12
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Originally Posted by dk_aero
According to the instructions that came with this plane, there is actually an ARF model available from the manufacturer. However, I wasn't able to find any reseller that offers it.
__________________
- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
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#13
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I actually took the steps to address this today. I reinforced the flimsy plastic wing joint cover piece (that you're supposed to glue over the joint, covering the wing screws thus making them inaccessible for removing the wing) with a piece of thick, rigid plastic from a tupperware dish. I used 2-stage epoxy to bond it to the wing joint cover, and then drilled screw holes into it through which I could insert and remove the wing screws as needed. As an added bonus, this made the wing joint MUCH stronger.
I also re-situated the antenna wire (which had been simply run out through the canopy and wrapped around the elevator push rod at the back) to run out the back of the wing mount and then taped it to the top of the vertical stabilizer. This obviously looks much nicer. I just hope it doesn't negatively affect reception. Additionally, after noticing that it seemed to be a bit weak while doing wing load tests, I added some extra packing tape reinforcement to the wing mount portion of the fuselage. I think this is the part of the plane that I'm most afraid is going to end up breaking, as all the wing load pressure and fuselage torque is going to be routed through this tiny little area of the plane which is only reinforced with hollow foam a bit of balsa framing. I doubt I'll be attempting any loop-de-loops or high-G snap turns in this thing any time soon, if ever. Lastly, the nose of the plane seemed so flimsy that I decided to give it a covering in cloth backed, waterproof duct tape. I did it clean, though, so I don't think it makes the plane look THAT much worse. And it seems to have strengthened it quite a bit. A nose-first collision is still probably going to crush the front a bit, but at least this makes it a bit more resilient and should also protect against scratches and stabs into the foam. I've got some pics attached below that show my modifications: I should've mentioned in the Build review that one other outstanding thing about this plane is how light it is for its size. In fact, even though I haven't done any tests with a scale yet, I dare say it weighs less with its battery installed than my Wild Hawk does with the video camera and battery on board. Hopefully, the extra tape and plastic I added today won't turn out to make it handle any less effectively. I tested the CG, and it still seemed to be balanced the same as before. (Although I really need to pick up a CG scale--my finger tests are a bit less than precise. )
__________________
- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
Last edited by gzsfrk; 02-08-2008 at 05:26 PM.. |
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#14
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One more interesting thing about this plane. While I was looking for Catalina ARF models, I found this Great Planes Electrifly model which appears to be almost EXACTLY the same as the Guan Li plane I bought, with the exception of the engine cowling assembly and the cockpit canopy. Oh, and the fact that the Electrifly is fiberglass.
![]() ![]() I'd say it's not terribly unlikely that Guan Li built their Catalina using a direct mold of the Electrifly model. Of course, ripping off designs is hardly a new practice--SDM obviously created my beloved Wild Hawk as a very close knock-off of the Easy Star. Still, I have to admit that the silver finish on the Electrifly makes it a MUCH better looking model.
__________________
- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
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#15
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The GP Cat is really nice, BUT... at $140 for just the plane (Tower Hobbies) is a bit steep for me (combo w/ motors and escs - $300).
I currently have a HZ SuperCub, GWS Beaver, GWS PT17 and GWS big Tigermoth... (Spektrum DX6) so you see where I'm coming from... gzsfrk - Can't wait to hear how she flies! (the final determining factor to decide if it's worth the work to make a RTF a RTF... <grin> ) I truly hope all goes well! |
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#16
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Originally Posted by FlyingMonkey
I might have to look into that. But actually, what I was thinking of for the canopy was just some gravity sealing. That is to say, right now, the canopy has no "step up" where it meets the fuselage. So if water splashed against it, it would just pour through the crack. I'm thinking I might use some foam or balsa to create my own step up and at least prevent against splash leakage. It might be even better if I combined the step-up with the sticky gel you mentioned.
Alternately, I guess I could just glue a 1/2" strip of light, stiff rubber or plastic along the bottom inside edge of where the canopy mounts to the fuse. That might be the easiest fix. And I guess I could add something similiar along the top front and back edges of the canopy. But I'll worry about that once it starts getting warm enough to get out on the lake with the in-laws 26' pontoon. ![]()
__________________
- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
Last edited by gzsfrk; 02-08-2008 at 05:32 PM.. |
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#17
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Guanli is well-known for making unauthorized copies of GWS kits (link). Then they throw in some ultra-cheap electronics and sell it as a RTF, taking advantage of the fact that GWS doesn't offer most of their planes as RTFs. First time I've seen them copy a Great Planes model.
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#18
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Well, I finally got out and managed to fly the Catalina Monday evening before the sun set--absolutely perfect weather with zero wind. Of course, it was a pretty timid flight since I wanted to make sure that everything was solid before trying too much with it. But I did get in an attempted barrel roll and loop (note the qualifier "attempted") before winding down the battery. I ended up getting in a 7 minute flight at mostly full throttle before the engine started sputtering and I decided to bring it in. It might have just been the cheap radio cutting out, but I decided not to take any chances, since the Catalina doesn't seem to be a great plane for gliding.
Anyway, I had my wife out there using our digital camera to record the maiden. It's terrible quality video, and it was an odd size so it left black bars when I went to convert it to something Studio Plus could understand, but here's the video of some highlights from the first flight. [gvideo]6307976883556757799[/gvideo] Again, please forgive the terrible quality of the video. Our camera doesn't let you zoom in when recording a video either, so often times the plane is just a speck. I'll try to get a better camera next time we bring it out for a flight so you can get a better idea of how this plane looks in the air (which is fantastic, by the way). Some quick notes about the flight:
I'm also going to be posting my list of recommended modifications for strengthening the plane prior to first flight. If anyone has any specific questions about the Cat, please feel free to ask and I'll be happy to answer as best my n00b self knows how. ![]()
__________________
- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
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#19
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Now, you need to find a nice long shallow puddle...
So you can SoW (scoot off water )I think that body, with a couple towerpro brushless motors, a real radio, I think I would want one... Do they sell replacement parts, like the fuse and wing? ![]()
__________________
Self proclaimed dictator of the Flite Test fan club. |
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#20
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Raidentech doesn't have any replacement parts listed for it yet. But I notice that for their best sellers (Yellow Bee, Wild Hawk, Piper Cub) they tend to end up offering replacements. If the Cat sells good, I'd say it could well see a selection of replacement parts on the site.
And I don't yet know of any other re-sellers who are offering the plane, although they may well be out there.
__________________
- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
Last edited by gzsfrk; 02-12-2008 at 11:15 PM.. |
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#21
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I really enjoyed your listing of short comings. I assumed you have built enough models to know a " not so great one ".
Many thanks. I will calmly wait for more GWS planes to appear. I love it when a bussiness ?? person, just decides to start making model planes. They could care less if it never flies or crashes. Make it look pretty and a plane made of dog do do, will sell like Hamburgers. This plane is not for a, "I only fly them." Rich |
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#22
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Originally Posted by Cyclops
Well, to be perfectly honest, this is only my 4th plane, and all of them so far have been RTFs (although as I noted in this review, this plane was much closer to a kit than my previous planes). I have a radio (Optic 6) due to arrive on Thursday, after which I hope to try my hand at some more serious ARFs, or maybe even a medium-difficulty kit.
Glad to be of help in making a decision. ![]()
Originally Posted by Cyclops
Well, as far as quality control and instructions go, this plane certainly left a lot to be desired. But I have to hand it to whichever designer came up with the plans for the model (which, I guess, would probably at least partially mean credit due to someone at Great Planes)--it flies great and is remarkably stable. Could do with some slightly more powerful engines, but seeing as I got 7 minutes of flight time with both 370s at full throttle on a 1000mah 7-cell NiMH, I can't fault them too much. I'd be surprised if I couldn't get 12-14 minutes out of it while being a bit lighter on the throttle, and maybe even more than that with one of my 1200mah batts.
So just to be clear, this plane leaves a LOT to be desired with regard to quality and the design weaknesses I've noted. But once I got it assembled and took measures to strengthen the structurally weak points, it really seems to be a great flying plane. And especially at the price point, even if you just bought if for the body, engines, ESC, servos, and battery and stripped out the junk radio (which I plan on doing Thursday), it still seems like a steal to me if you were just buying it as an ARF w/electrics at $99. Again, it's not going to be competing at the GeeBee. But if I'm able to get it taking off from water, then I still think that, despite its flaws, it's a tremendous value.
__________________
- Matt . "The exhilaration of flying is too keen, the pleasure too great, for it to be neglected as a sport." - Orville Wright
Last edited by gzsfrk; 02-13-2008 at 05:33 PM.. |
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#23
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I think that I will just be forced to cut my own from foam
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__________________
Self proclaimed dictator of the Flite Test fan club. |
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#24
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Wow great flight! Nice review too! Very cool!
__________________
Do life with optimism
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#25
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My first DIY foamy was a lot to attack as a first plane. I bought the plans from the AMA site. Blew them up. Bought BIG-- billets of blue foam, Cut out frames of the plans and started shaping a 2' X 1' X 6' piece into the Clipper below. If you start a plane you REALLY WANT, You will finish it.
Rich |
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| Tags |
| catalina , guan , li , review , rtf |
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