RE: Lanier Yak
 

Maudib,

Thanks for all the great tips. I am still deciding on the aileron servos, Lanier strongly recommends against. I had already cut out under the wing tube to put both the gas tank and a 24 oz tank for smoke, they easily fit side by side. But it nice to see your mods.

On the hardware, I was missing a few pieces and changed the screws to put on the tail gear as one broke installing. I was concerning over the 6-32 x 3" bolts for the control horns, so I got a heavy pair of side cutters and tried to cut them. They appear to be fairly high grade as it took quite an effort to damage them. I thought the hardwood seemed thin where they go through to counter sink to accomodate the heads, so I used the plastic cup washers for the top side under the head. Since there are not enough to use two on everything, I went to Lowe's and got some cup washers to use on the aileron control horns rather than counter sinking there. I also used 6-32 tap to tap all the plastic fittings as it proved more than difficult to thread the various nylon fittings.

Blue Skies and Fair Winds,

Rege Hall
3Dflight

RE: Lanier Yak
 

and I'm still waiting for my Yak...:(

RE: Lanier Yak
 

3D FLight... Sure you can add my site... it's not much yet, it's grow a LOT these coming few months. Intersting about the 6-32... I'll give them a second look, but I'm really leaning on ordeing some 8-32 titanium allthread from smallparts.com. They also offer it in 6-32 as well, perhaps that's the way to go? I wish they carried it in 4-40 as well.

Hey Ifly... we get's to build another side by side huh? Groovy. :) Actually what I've done is about as far as I'll go for a short time... I am SO buried in webwork right now I can't see past the monitors. So you have plenty of time to catch up. :)

Hmmm... we go from a featherweight to a heavyweight.... ding ding.... :)

RE: Lanier Yak
 

Yep, and Aerobob has another Ulti on order. I knew he couldn't go without one to long.:D

RE: Lanier Yak
 

Man this thread has grown quite a bit since Friday!!! Anywa weekends in the winter are a killer for me when it comes to the internet and things like this post and working on planes. The downfall of being a bachelor. :D Alcohol and women make it hard. Hell in the summers it's hard, but I always make time for the planes. Anyway Maudib, no worries on your previous post, I'm just hoping to fly with you and yours this summer when I visit my friend in C-bus. Well anyway, I threw in teh Ailreon servos this weekend, Some Airtronics High speeds, don't remember the number off han, but they have a speed of .06 sec at 6V. 115 oz/in torque. These in the outer bay and only one per side seem like they will work. I put an awful llot of force on the whole aileron and got no real flex that I felt will be a problem. It may work and it may not, I will be catious of the flutter, but obviously, I am looking for 3D and won't be flying fast. Mostly below 60mph if my pitch and RPM's are calculated right. Which is 77 mph, before the drag at full throtle for a 8 pitch prop running 7000 rpms. anyway, I will report back, once all the B-ball games are over and I sober up. :D Probably tomorrow at work. My buddy is complaining I haven't grabbed a beer in the past 1/2 hour, since I have been reading the new posts on the this thread. Go Bucks!!!!!!!

RE: Lanier Yak
 

A couple more bits,

* If you put the rudder servo(s) in the stock location and plan to put the receiver in the stock location as well a 24" extension wont cut it, will have to be a 36" or a combination to get there.
* The manual suggests the rear servo's go in with the shafts at opposite ends on page 6, then on page 10 and 11 jumps over to what appears to be the configuration for the proto in the Lanier web site pics (Just causes a double take).
* More of a gripe than anything: The 4-40's supplied with my kit had to be re-cut with a dye in order to take a nut, and they are just a tad shorter than I would like, which equates to “measure everything twice” ;)

RE: Lanier Yak
 

Hey pcsol,

Thanks for the heads up on the extension cables for the rudder.

I am ordering Dubro's Heavy Duty Contro Horns #913 (2 each), and #882 (1 each). These use an 8-32 threaded shaft. or 8-32 bolts which are much sturdier. And they have the advantge that they use swivel washers and posts that acomodate to the surface angles (better than Rocket City). I am also getting 1.5" SWB arms, Dubro 4-40 HD Ball Links, and H9 Ti Pro-Links. Airwild sells the Pro-Links from 1.5" through 5" for bettween $5.40 to $11.70 a pair. Have to wait until I get the servos set in position and the horns installed to measure the necesary lenght for the links.

I am going to follow Maudib sugestion and feel I can mount two side-by-side 16 oz Dubro or Sullivan Flextanks under the wingtube socket at the CG. I'll use one for gas and the other one for smoke fluid. Will be sending photos as soon as I get these parts installed.

I will like to sugest to those installing very lightweight engines, and if they run into CG issues. The full scale Yak 54 runs the prop shaft from their radial engines WAY forward of the cowl (see photo).
It may not look bad to place the engine 3/4 inch or more further out to balance the plane.

RE: Lanier Yak
 

You can't use Sullivan Flex tanks... They say right ojn the label "glow fuel only" in bold type.

On the light engine... I measured and I get about 8: from the firewall will place the spinner back about 1"-1 1/8" from the front... should be lookin' pretty scale. With the DA50 that requires 4.25" standoffs. Mine should be on their way and I'll get the engine mounted and take a look see...

Really is a nice built and covered airplane...

RE: Lanier Yak
 

I was able to get the fuel tank included with the kit (don't know for sure how much it holds) and a DuBro 24 ounce under the wing tube. I will use the DuBro tank for smoke fluid. The Sullivan flexible tanks are made from a different plastic that allows them to be heated and mold them to some extent. I would assume the properties of the tank may cause it to swell with gas as does some silicone tubing. I received ny AI pilot last night and muffler for a 3W engine. May be ready to fly this weekend, but it does not look good weather wise here in central Indiana.

Blue Skies & Fair Winds,

Rege Hall

RE: Lanier Yak
 

I wasn't aware of that, thank you. Most likely will try two 16 oz Dubros.

Are these tanks side by side? About how much you have to cutoff from the former under the wing tube? Don't want to weaken that former by cutting too much.

RE: Lanier Yak
 

I didn't know about the flex tanks not beign gas compatible til I had a low testosterone moment and read the label... :)

Here's a couple pics... 1st is a single 20oz tank... thay are about the same height and the 2nd are TWO 20 oz side by side. The two aren't shoved unfrt the wingtube sleeve because I only have that flange cut for a single tank, but shows you if you cut it off all the way acrss they'll slide under there nicely. Add 1/4" foam if you wish and when you velcro or zip down it won't touch the tube at all...

I wouldn't worry about cutting the top part of that former flange til it's flush with the forward floor... lots of interlocking there AND when you epoxy a plate on top let it overhang to catch the floor too and it'll tie it all back in again anyway.

Sounds like the 2-24oz will work too...

RE: Lanier Yak
 

Thanks for the pics Maudib. If you think two 20 oz tanks will not be too much weight, I am going to give them a shot. After I verify fuel comsumption, I may go to 16 oz tanks. Apreciate your help.

RE: Lanier Yak
 

Me? I think one 16oz is too much... but you guys can know yourself out... ;)

At least they'll be on CG.

I would think a 16 oz on the 80 would get you a clean 15 minutes with time to spare... but 16 oz of smoke fluid is gone in a heartbeat from what I've seen.

This would be purdy with smoke, but with the 50cc it would definitely only fly sport. Dual 24's WOW... 3 lbs of liquid in a 20 lb 80cc plane... 23 lbs wet.... That seems like an aweful lot for 1460 sq in... at least a significant change of flight feeling from start to land.. Somebody needs to invent wingstretcher... ;)

RE: Lanier Yak
 

Aircraft International pilot, slightly less than an ounce. I used Maudib's cockpit lightning up, only gained 3.5 ounces. But hey, a little here and a little there all adds up. Also, just before I started building I re-weighed every thing and it had lost about 6 ounces. Hopefully the balsa has dried out enough that it will not absorb near that much again.

Mine is getting a 3W 75, it was that or a G62. All I had not flying.

Blue Skies & Fair Winds,

Rege

RE: Lanier Yak
 

Lookin' good Rege,

6 oz WOW, I woulda never thought that.... but that's a really good thing. Definitely a review point...

And 3.5 oz inthe canopy is real good... almost 1/4 lb...
Keep the pics coming...

RE: Lanier Yak
 

I re-weighed the wings again... and sure enough anoth .5 oz is gone... That's 1 oz total the wings have shed since initial weighing...

The fuse was closing on 3... the stabd maybe 1/2 or so...

So looks like I lost over 4+ oz too... Who'da thunk it! :)

RE: Lanier Yak
 

Maudib,

What does your DA 50 with muffler and ignition weigh? My 3W 75 weighs 5 1/2 pounds dressed out. I am debating how much to spend on carbon fiber stuff. As you stated earlier, the main gear looks like a prime target if Graphtec can get them.

Blue Skies & Fair Winds,

Rege

RE: Lanier Yak
 

My DA50 with ignition & prop bolts is 51.9 oz

The muffler (stack uncut) is about 5 oz (Mine cut was like 4.1 oz)

Custom 4.25" standoffs should be right at 6 oz. (close calc based on weight of 1.72" ones)

So we'll round it all to 62 oz or 3 lbs 11 oz... or ballpark 3 3/4 lbs

Keep in mind this is complete mounted to firewall... not sure what standoffs you might need to make up to mount the 75...

That's the 75iUS version with the side carb?

RE: Lanier Yak
 

For my Yak it is still a mystery on what engine I'll use. Although I have a DA-50 I am not sure that this will be the engine of choice with the weight of this plane, even with the CF gear. Flight reports are the only key I think. I am interested in the ZDZ 80RV-J but this will increase the wingloading to around 30oz/in.

I have received 1/2 boxes. Tower short shipped and are now sending the wing box with UPS. I have not noted any change in the weight over the two days I have had the fuselage and other parts. The 6oz change that Rege reported is a huge amount of weight!

I look forward to hearing some flight reports or video if at all possible.

Lang

RE: Lanier Yak
 

It's possible that yours already dried out in the shipping from Illinois, US to Perth, Australia :)

I fly my DV at 17.25 lbs and it's no slouch... not over the top 3D performance, but will climb out fo a hover decently...

That's where I want to end up with this Yak now... (not my original goal, but sometimes you gotta have in-the-field re-assessments) :)

I WILL get there... [>:]

RE: Lanier Yak
 

Yes, mine is the 75IUS, side carb, which is lighter than the rear carb model. The engine completely bare weighed 4 pounds 11 ounces.

Blue Skies & Fair Winds,

Rege

RE: Lanier Yak
 

Gentleman,

Stupid question before I start hacking away on the firewall, the instruction manual says to space the engine 6 1/4 from the firewall. With cowling in place, mine is going to require a min of 6 3/4" Anybody else notice this?

Blue Skies & Fair Winds,

Rege

RE: Lanier Yak
 

You need to replace these anyhow with proper 8x32 horns. Best replacement yet is the DuBro 913. The Hangar 9 ones are OK as well.

RE: Lanier Yak
 

3DFlight.
I'm with you on the engine block question.

RE: Lanier Yak
 

Rege,

I believe that what the instructions require is that your specific engine length (from spinner backplate hub to standoffs mount) , plus the standoffs length should come up to 6 1/4". I don't have my cowl (sent it back Tower for replacement) to measure. When I did measure it my engine only required 1" standoffs (5 1/4" engine length plus 1" to clear cowl front). What distance you get when you measure from the firewall to the cowl front edge? It should measure close to 6". Please let me know if it's different.