HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Sep 25, 2012, 10:45 AM
DFC~ We Do Flyin' Right
bsbauman's Avatar
USA, GA, Atlanta
Joined Nov 2008
13,771 Posts
I had actually made that post before you had posted all your pics

By the looks of it, despite the level of prefabrication, your parts count is quite high for a Maxford kit. I too thought their manuals lacked, but admittedly mine were not as much work as yours.
bsbauman is online now Find More Posts by bsbauman
RCG Plus Member
Latest blog entry: Racing anyone?
Reply With Quote
Sign up now
to remove ads between posts
Old Sep 26, 2012, 06:37 PM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
1,459 Posts
Started with the assembly on the wings, First thing I notice when I slid the wings on were the tubes we very tight, after working the tubes in/out a few times they did loosen up, but are still tight. Something surprising is there is no wing bolt attachment at all. I guess they are relying on the wing struts to hold the wings in place. Not sure but I may add a blind nut/bolt of some kind,, We'll see after finial assembly

I didn't like the wood blocks they give you for the servo mount, looked to me like the wood would just split, so I used 3M double sided foam tape. I also rubbed a couple drops of Medium CA on the wood so to seal the pores of the plywood. This tape sticks very well, never had it come loose before, I used cap screws for the hatch, ditched the oem Philips screws. Used the supplied Ca hinges for the Aileron. T-pins help center the ca hinge. all straight forward. But, missing from the kit was control horns for the ailerons, I had a set of light weight ones that should work fine, I used epoxy for those. Z-bend pliers worked great for making the pushrods

Next the ail & rudder servos, Cut out for servos were too small for the hs85 servos I planed to use. Also the Ply base is very thin, maybe 2mm ply. Not shown but I'll add a piece of wood to give the screws more bite.

Problem going forward is the pushrods end up below the servo horn, I had planned on making a z-bend, I could use the ez connector supplied but it would make adjustment difficult.
scale_only is offline Find More Posts by scale_only
Reply With Quote
Old Sep 27, 2012, 12:45 PM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
1,459 Posts
Horizontal stab is straight forward, remove covering and glue down. It comes with holes for screws in the stab, but no pre drilled holes where it sits on the fuselage. So you have to measure to get it square as you drill the holes. I centered and drilled the aft hole, then used a tape measure to make sure it was straight as I drilled the last two holes. Carpenters glue was used, much easier to clean up than epoxy, and I'll most likely leave the screws in, looks better than an empty hole.

The slots for the CA hinges were not cut deep enough for the supplied hinges, so I had to run the #11 blade deeper to get them in correctly, not a big deal but I will say, it's better cutting deeper than trimming the hinges.

I choose to install the control horns before I glues the rudder and Elevator hinges. It's much easier to screw them to get this way, just need to remember to hook up the push rod as you install the surface.

Another Tip,,
I like to tap the threads of the plastic piece before I screw the control horns on. I just Chuck a screw into my cordless drill and work it back and forth like a tap. So much easier when assembling and you do need to push near as hard as you put it together.. less chance for the screwdriver slipping and doing damage.

As suspected the plywwod servo tray was very thin and broke as I pull the servo out to change the servo horn, I added reinforcement pieces made from 3mm lite ply. Z-bends again at the servos and a drop of CA to hold the new Pushrod Sleeves in place

next will be Motor install
scale_only is offline Find More Posts by scale_only
Reply With Quote
Old Sep 30, 2012, 08:16 AM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
1,459 Posts
Engine install pretty straight forward, No mounting hardware is provided, so I used 4-40 Stainless steel cap bolts with blind nuts. There are lines scribed on the firewall so the X mount was used as a template. Hobby King Turnigy G15 950kv motor will be used. Powered by a Turnigy 45amp ESC.

Difficulty with the hatch/upper deck at the engine compartment design is it leaves you very limited access to the area you'll want to mount the ESC and battery. What I most likely will do is mount the dummy engine with magnets so it's removable easily to help with the battery placement, the esc is wedged in below the battery platform,, Just about impossible to secure it via zip ties as you really can't get your fingers in there, it doesn't seam to move around, so I'll leave it as is and keep an eye on it for chafing.

Float mounting also simple, 4 metal tabs are epoxied into the floats, they fit in nicely all the way and bottom out on something so no guesswork where they should stop. I did drill2 small additional holes before gluing to give the epoxy a good place to bite. (sorry no pic) I tossed the provided wood screws and used powder coated black servo screws for the cross bracing and 3mm screws with ny-loc nuts for main gear mounting.

At this stage the plane balances right on the spar, with a 3s 1800 pack midway in the battery area, no prop or cowl on yet, but looks like balance shouldn't be an issue.

I took it out for show and tell at our 1st annual Fall Fun Fly yesterday,, the typical jokes and ??s What is it? Your rudders is up-side-down, Yuk yuk,, but everyone thought it was cool. Only one other club member knew what it was
scale_only is offline Find More Posts by scale_only
Reply With Quote
Old Oct 01, 2012, 07:54 AM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
1,459 Posts
Finial stretch

I did decide to attach the dummy engine with magnets after all, a Forstner bit an epoxy did the trick. The engine cylinders are some sort of rubber foam so drilling was easy. Attaching magnets to the fuse also easy as the lightening holes were in the perfect spot. Scrap 3mm lite ply did the trick for support.

Wing strut attachment next, As soon as you pull them out of the box you see the prebent angles are not right and adjustment will be needed, (says so in the manual). Luckily they used soft aluminum that was easy to bend, I did have to get out the full scale tools. a 12" Channel Loc pliers did the trick nicely. The process was easier than I thought it would be at first, took a little time, but not that much hassle. Finding the hard points to attach to the wing is easy too. The forward hard point is seen through the covering, but the rear can't be seen because of the servo hatch plate, but if you feel inside you find the hardwood doubler, Center was about 19mm from the edge of the servo hatch. Drilled a pilot hole and I used the Hex type servo screws not the provided Philips.

After that was done my fear that the strut would interfere with the Aileron pushrod came true. I had to change the angle by flipping the servos so the horn was positioned near the back of the hatch, and lower on the control horn. Plenty of clearance now

While I had the wing off I thought this would be the right time to install the graphics, They went on easy, but I did notice one of the large crosses wasn't cut symmetrical, the white boarder was uneven,, I used this one on the bottom. I did place the numbers horizontal with the waterline,, Funny thing is If you look at the picture they based the scheme on on their web site, it is horizontal,, who ever built the prototype just screwed up.

Also while I had the wings off I went through and added locktite to all the screw/bolts that weren't nyloc style on the wing struts
scale_only is offline Find More Posts by scale_only
Last edited by scale_only; Oct 01, 2012 at 08:06 AM.
Reply With Quote
Old Oct 01, 2012, 08:04 AM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
1,459 Posts
Cowl install was relatively easy. Cowl is Vacuformed plastic not Fiberglass, some trimming is needed otherwise it will cover up the scale like vent holes. Two predrilled holes each side are there but I added a third to snug it up at the top, that area is just Balsa so I added a 3mm lite ply scrap for the screw to bite into. I used the fold back paper trick to locate the holes and mark where to cut the cowl.

And that's pretty much it, it's ready to trim and fly,, all up weight is about 3 1/2 lbs with the 3s 1800, so there weight specs are right on. It feels stout for an EP plane but that only equals out to 15.22 oz/sq.ft wing loading. Should fly nicely.

Water testing soon
scale_only is offline Find More Posts by scale_only
Reply With Quote
Old Oct 02, 2012, 03:56 PM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
1,459 Posts
No words right now

I moved the battery all the way forward too. CG point in Manual works out correct @ 25% of Mac,, It does sit on the water slightly nose up (first pic) but the slightest rearward pressure and it sinks by the stern. I guess I could try and move if forward some, with the flat bottom airfoil, I could get away with a noes heavy plane. I'm trying to stick with a stock set up as much as possible for testing.

Shouldn't be this close. Unfortunately their attempt to honor the scale outlines as much as possible resulted in a smallish float system,, It most likely will be fine under taxi, but my fear is if you dead stick for any strange reason it will sink and flip over.

I'll proceed with Taxi Testing,, if that goes well I'll maiden it as is.
scale_only is offline Find More Posts by scale_only
Last edited by scale_only; Oct 03, 2012 at 08:41 AM.
Reply With Quote
Old Oct 03, 2012, 10:13 AM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
1,459 Posts
Well I tested with Moving the CG forward, I added 3.4oz of lead atop the dummy engine. It made no difference, the floats just don't have the reserve buoyancy to support the weight of the plane properly. That couple with the scale like tapered tail of the floats make it drop there easily or at least first.

I was going to taxi test, but I'll have to wait to do it where I have a recovery boat if needed,,

I'm really unhappy I choose to be the guinea pig, good news is I have the skills to fabricate a set of floats, I feel sorry for any newbies who hope it will be good out of the box
scale_only is offline Find More Posts by scale_only
Reply With Quote
Old Oct 08, 2012, 12:09 PM
DFC~ We Do Flyin' Right
bsbauman's Avatar
USA, GA, Atlanta
Joined Nov 2008
13,771 Posts
It is a stupid question, but what the hell~ Did you do that float test with your battery installed?

In that second photo, is that really how it sits in the water? Looks much better on this video:
Hansa-Brandenburg W.29 (3 min 33 sec)
bsbauman is online now Find More Posts by bsbauman
RCG Plus Member
Latest blog entry: Racing anyone?
Reply With Quote
Old Oct 08, 2012, 12:35 PM
DFC~ We Do Flyin' Right
bsbauman's Avatar
USA, GA, Atlanta
Joined Nov 2008
13,771 Posts
Is there a chance your floats may be taking on water?
bsbauman is online now Find More Posts by bsbauman
RCG Plus Member
Latest blog entry: Racing anyone?
Reply With Quote
Old Oct 08, 2012, 01:20 PM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
1,459 Posts
LOL, yes, battery was in


I notice they never have the plane stopped on the water in that video,
scale_only is offline Find More Posts by scale_only
Last edited by scale_only; Oct 09, 2012 at 08:33 AM. Reason: I shouldn't post when I'm in a bad mood,,
Reply With Quote
Old Oct 09, 2012, 01:23 PM
Airplane crasher
CapMike's Avatar
USA, CT, Shelton
Joined Jan 2008
2,689 Posts
A month ago I was with a friend doing video of the plane for an article. I can attest to the fact that it sits tail heavy on the floats. I reserved comments for that very reason. As far as it being an issue it will set the tail in the water but as soon as you blip the throttle it will set up on the water. The rear of the floats will still be awash even though they are not taking on water.
Do your TO run from the beach and she will stay up, do your flight and then make sure you keep throttle on all the way down. Keep a reserve of battery so there isn't a dead stick issue.
Scale I would suggest if you have the wheels option to use them to get a feel of the plane and battery life, then go for getting it wet
CapMike is offline Find More Posts by CapMike
Reply With Quote
Old Oct 09, 2012, 04:09 PM
# Scale is a way of life
scale_only's Avatar
United States, OH, Avon Lake
Joined Apr 2010
1,459 Posts
Thanks for the input Mike,, Seamed to fly nice in the video, anything to watch for?
scale_only is offline Find More Posts by scale_only
Reply With Quote
Old Oct 09, 2012, 06:04 PM
Airplane crasher
CapMike's Avatar
USA, CT, Shelton
Joined Jan 2008
2,689 Posts
Quote:
Originally Posted by scale_only View Post
Thanks for the input Mike,, Seamed to fly nice in the video, anything to watch for?
I didn't get to fly it but she seemed to fly nicely. We were in a bit of wind that day and if you look at the video on the Anderson Kingfisher thread you will see that the day wasn't too nice.
That being said it looked like it did well and handled the wind with no problems. As I said fly it down to the water and keep some power on when bringing her to shore. In the Video posted to this thread you can see that they were running her slow and the floats were almost under water
CapMike is offline Find More Posts by CapMike
Reply With Quote
Old Oct 09, 2012, 10:25 PM
TonyS
United States, AR
Joined May 2010
558 Posts
Quote:
Originally Posted by scale_only View Post
Seamed to fly nice in the video, anything to watch for?
My scale obsessed flying buddy (45 years rc experience, much seaplane/floatplane) had to have this kit. Finished it near end of August.

Much "stick on" weight (3+ oz.) had been added to the top of floats as far forward as possible. CG balance point had been set as top rear of floats even with calm water surface, as per telephone conversation with someone at Maxford (after it kept sinking the tail every time we set it on water).

First flight was from ground with thin plastic protector on bottom of floats. Straight line take off with slight rudder, fifty+ feet before airborne. Climb was slow, flight was scale like and control was adequate. I don't know what he had set for control movements, believe they were per instructions.

A couple of days later first water takeoff flight was intended, but wind created 4-6 inch height waves which rolled over front of floats, keeping plane from accelerating to takeoff speed. A week later with virtually no wind, water takeoff and landing were successfully accomplished, twice. I took control because he had a gnat fly into his eye. Aileron was a bit sensitive for me, elevator and rudder as I liked. She flew scale-like, somewhat slow; slight up elevator and a little "top" rudder for level turns. I performed two gentle loops and a couple rudder-aileron rolls, starting with a little nose up. I had tried one aileron roll from level flight the roll rate was way slow and the nose drop was significant.

I also made the first landing it was a matter of reducing power to 3-4 clicks above minimum, keeping wings leveled after turning into the wind and adjusting power up/down to control glide angle. Then slowly applied, slight elevator about 2 feet above water to get a flare and glide glide down to surface. It did not slow down as quickly as I expected, so perhaps I was a little fast.

Following week, he experienced control malfunction and flipped it in landing. Floated upside down until wind brought it near shore, in heavy reed growth. While being helpful and retrieving the plane, another flying buddy forced the floats thru about fifteen feet of reeds...result was broken and splintered floats and bent struts, with several pieces missing. Plane's owner is awaiting back ordered float kit from Maxford.

TonyS
tonystro is offline Find More Posts by tonystro
Last edited by tonystro; Oct 09, 2012 at 10:34 PM. Reason: to add flight character
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
New Product Hansa brandenburg 29 !!!!!! My dream come true!!!! BRUTUS2238 Electric Warbirds 16 Nov 13, 2012 10:51 PM
Discussion Hansa-Brandenburg W.29 lake flyer Waterplanes 47 May 09, 2012 10:43 AM
Discussion Hansa-Brandenburg W.29 Pete Miller Scale ARF/RTF 4 Dec 25, 2011 01:58 PM
Contest Scratch Build Off 3 : Hansa-Brandenburg W.29 lake flyer Scale Kit/Scratch Built 419 Sep 10, 2011 11:51 PM
Discussion Hansa-Brandenburg W.29 lake flyer Foamies (Scratchbuilt) 17 Apr 26, 2009 09:33 AM