Welcome to The FlyingGiants! - please login or click this bar to join our community...

 

Welcome to The FlyingGiants Community! We're all about fun, and inside you'll find the greatest, friendliest, and most helpful group of people around! If this is your first time visiting, please check out site, and click here to sign up! We hope to see you soon!!

Go Back   FlyingGiants > Giant Scale Planes > Airframes and Kits
Forgot your password? Create a new account


Reply
 
Thread Tools
Old 05-05-2011, 02:21 AM   #1
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default Nitro Planes 100cc Yak54

Mini Build thread and review for Nitro Planes 100cc Yak 54.


Specs: as measured
Wingspan: 103 inches
Wing area: 1968 sq in
Engine used: DA 100 w/mufflers
Prop: Xoar 27x10
Servos: Ail – 2 HS 5955Ti each ail
Elev – JR 8411 one per elev
Rud – single JR8711 on pull-pull
Thro – Std Hitec 545
Batt: Single Hyperion LiFe 3800mah Rx pack
Ign: 2 cell A123 1100mah
Weight RTF minus fuel: 29 lbs – 11 oz
Flight video:
 
 
OK, so they edited out the IMAC portion of that flight. Anyways, I was trying to show the plane’s flight qualities for both sequence and 3D flying. The plane tracks quite well and has very little roll or pitch coupling in KE & I did not use any mixing.
I would say that this plane is suited for the sport flyer that wants to fly Giant Scale but wants to stretch his hobby dollars as far as they will go, and might occasionally fly some IMAC in Basic or Sportsman class, and will throw in some 3D into their sport flying once in a while.
If you are a hard core extreme 3D nut and is considering entering the Extreme Flight Championship, then you would’ve noticed the overall weight listed above, and know that this plane will not be for you. Yes of course the plane will fly 3D but it needs more throttle to compensate for the weight and it won’t be as “floaty” when flying around in post stall (harrier) attitudes.
The plane does quite well for sport flying and a 100cc engine will be sufficient for IMAC in the Basic, Sportsman and even Intermediate class. Serious competition pilots that have their sights on the Tucson Aerobatic Shootout will probably move into a more capable airframe if they enjoy the IMAC type of contests. But lets not forget that we want pilots to at least try out IMAC in the Basic class and see if they enjoy the experience. This plane will allow the sport pilot to practice the Basic sequence to improve their flying and maybe enter a contest or two.
I think the reality is that there are way more sport pilots than there are IMAC and hardcore 3D pilots. Many will never compete or fly 3D down on the deck but they probably have seen other pilots practice IMAC or have watch 3D nuts throw down. Then they find out how much $$ is invested by these pilots for these demanding disciplines and they may think that giant scale is not in their budget. Well, in my opinion, I think that a 35% aerobatic plane can be done for about the same cost as a good 1.20 sized war bird with retracts and flaps. It comes down to what your budget is and how you can make it affordable. You don’t need the latest brushless/serial/titanium/1000 oz-in servos to fly this plane. Just because new servos are released, it doesn’t make the older servos obsolete. Used engines and servos come up for sale pretty regularly and can be had at great savings.
 
I took quite a few pictures during the assembly of the plane and in the following I will address some areas that need attention. I will do short installments of the different parts of the airframe assembly. The assembly manual that came with the plane was really of minimal use so I’ll just note the steps as I assembled the plane. Assembly sequence is not that critical so you can do what you like first. Sub-assemblies like the wing panels or stab/elevators can be done and then set aside. Some like to start with the fuse but I ended up doing that last.
Attached Thumbnails
  • Click image for larger version

Name:	Nitro Yak54 013.jpg
Views:	144
Size:	81.2 KB
ID:	374042 81.2 KB · Views: 144

  • Click image for larger version

Name:	Nitro Yak54 014.jpg
Views:	138
Size:	75.7 KB
ID:	374043 75.7 KB · Views: 138

  • Click image for larger version

Name:	Nitro Yak54 012.jpg
Views:	185
Size:	81.0 KB
ID:	374044 81.0 KB · Views: 185

airbike is online now   Reply With Quote
Old 05-05-2011, 02:30 AM   #2
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default Mini Build thread and review for Nitro Planes 100cc Yak 54.

 
I started with the stabs:
 
 
One of the mounting tabs was broken so I repaired it using a doubler made from lite ply. I decided not to use the hinges that came with the plane and used some heavy duty Robart hinge points from my own stash. I usually decide to upgrade parts if it is not easily replaceable in the future and the original hinges had a bit of play in them.
I used JR8411 servos (155 oz-in @4.8v) for the elevators but any similar rated servo would be fine. Of course if you have higher rated servos, that would be nicer but not really necessary.
I noted that the stab tube is very small (less than ½” OD) on this airframe. If you love to do high speed walls and blenders and high speed full deflection snaps, watch out. You probably should add a carbon tube inside the alum stab tube for added strength & stiffness for these very high stress maneuvers.
Attached Thumbnails
  • Click image for larger version

Name:	Nitro Yak54 004.jpg
Views:	202
Size:	63.0 KB
ID:	374045 63.0 KB · Views: 202

  • Click image for larger version

Name:	Nitro Yak54 003.jpg
Views:	188
Size:	64.2 KB
ID:	374046 64.2 KB · Views: 188

  • Click image for larger version

Name:	Nitro Yak54 007.jpg
Views:	185
Size:	49.5 KB
ID:	374047 49.5 KB · Views: 185

  • Click image for larger version

Name:	Nitro Yak54 016.jpg
Views:	254
Size:	70.8 KB
ID:	374048 70.8 KB · Views: 254

airbike is online now   Reply With Quote
Old 05-05-2011, 02:32 AM   #3
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default

stab pics
Attached Thumbnails
  • Click image for larger version

Name:	Nitro Yak54 025.jpg
Views:	267
Size:	42.1 KB
ID:	374049 42.1 KB · Views: 267

  • Click image for larger version

Name:	Nitro Yak54 023.jpg
Views:	208
Size:	49.0 KB
ID:	374050 49.0 KB · Views: 208

  • Click image for larger version

Name:	Nitro Yak54 020.jpg
Views:	185
Size:	36.4 KB
ID:	374051 36.4 KB · Views: 185

airbike is online now   Reply With Quote
Old 05-05-2011, 02:35 AM   #4
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default Mini Build thread and review for Nitro Planes 100cc Yak 54.

 
 
Wings: aileron hinging and servo installation;
Like the elevators, I also replaced the stock hinges with Robart heavy duty hinge points. However, I decided to double up on the inboard and outboard hinges. Again, these are things that I would recommend to make the airframe more durable and last longer. The gas engines are powerful and the vibration forces will wear the airframe down so this is good reinforcing at minimum cost.
The ailerons were hinged and I used two Hitec HS5955 servos for each aileron. The hardware package supplied didn’t have enough linkages for both the elevators and the ailerons, and since I assembled the elevators first, I needed another set for the ailerons. Luckily, I had enough linkages from my parts box to complete the aileron servo installation. I programmed these servos using a protractor gage to give me +/- 60 degrees and then I adjusted the outboard servo to match the inboard servo. An inline ammeter is very useful to set the servo endpoints and center point to give the lowest current draw.
This plane has very large ailerons and the roll rate can be very fast so you won’t need to try to get massive throws on the ailerons. I didn’t measure them, but the ailerons look to be constant chord and do not taper in size towards the wing tip. I was a bit surprised at how fast this thing can roll!
Attached Thumbnails
  • Click image for larger version

Name:	Nitro Yak54 003.jpg
Views:	160
Size:	43.7 KB
ID:	374053 43.7 KB · Views: 160

airbike is online now   Reply With Quote
Old 05-05-2011, 02:39 AM   #5
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default Mini Build thread and review for Nitro Planes 100cc Yak 54.

 
 
Fuse and rudder:
First things first; go get a bottle of wood glue, I used Gorilla wood glue, not the foaming glue, just regular carpenter’s glue. Many of the formers and stiffeners in the fuse were loose with very little glue in the joints. I used a small brush and added glue to pretty much all the joints I could reach. The carpenters glue is water based so once the moisture evaporates, the weight added is minimal.
I suppose this is one of those area where you’ll need to use a little extra effort to offset the lower QA of the model given its price point. I don’t really agree as I still think that a model should have glue in the joints!!! But it is what it is and a little effort saves a lot of $$.
Rudder installation is straight forward. Again, I used Robart heavy duty hinge points to replace the stock hinges and I added an extra hinge at the bottom of the rudder. I use Gorilla glue (the foaming polyurethane one) for the hinges.
After the rudder has been hinged to the fuse, I installed the pull-pull linkages and wires. The stock wires are very thin at only .014” dia so I used some 135 lb rated (.026” wire w/ nylon coating) fishing leader for my pull-pull.
Now is the time to decide how you want to modify the elev/rudder area. There are precut slots in the fuse for the wire exiting to the rudder control horn, but if you use these (which I did) to line up the location of the rudder control horn, then “UP” elevator will interfere with the rudder.
To resolve this issue, I decided to cut off a portion of the elevators to give more clearance to the pull-pull linkage. See pics. I peeled back the covering material carefully and trimmed off the inside corner of each elevator with a saw, then added a stiff 1/8” balsa cap and re-ironed down the covering. Sometimes I wonder if the factory ever assembles their models for flight or just for pictures. A little frustrating but the fix didn’t take much time.
I think that another way around this issue is to raise the fuse slots for the wire exits.
Attached Thumbnails
  • Click image for larger version

Name:	Nitro Yak54 001.jpg
Views:	232
Size:	73.6 KB
ID:	374056 73.6 KB · Views: 232

  • Click image for larger version

Name:	Nitro Yak54 002.jpg
Views:	211
Size:	29.7 KB
ID:	374057 29.7 KB · Views: 211

  • Click image for larger version

Name:	Nitro Yak54 003.jpg
Views:	205
Size:	31.5 KB
ID:	374058 31.5 KB · Views: 205

  • Click image for larger version

Name:	Nitro Yak54 007.jpg
Views:	221
Size:	62.1 KB
ID:	374059 62.1 KB · Views: 221

  • Click image for larger version

Name:	Nitro Yak54 008.jpg
Views:	193
Size:	48.0 KB
ID:	374060 48.0 KB · Views: 193

airbike is online now   Reply With Quote
Old 05-05-2011, 02:45 AM   #6
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default Mini Build thread and review for Nitro Planes 100cc Yak 54.

 
 
Engine installation:
The firewall is already mounted on this plane and appeared to be fairly well glued in with tri-stock at several key areas. You can add some dowels to pin the firewall to the fuse sides if you want or even add some fiberglass/epoxy if your plane seems to need it. I would suggest a careful inspection of this area as the planes may have different levels of fit and glue soundness.
The firewall has centerlines etched on the front as well as an offset line to account for the right thrust. I measured out the engine mounting pattern for my DA100 (70mm W x 80mm H) c.t.c. and drilled for some ¼-20 blind nuts. The hardware package did not have any engine mounting hardware so I used some ¼-20 bolts and blind nuts. I always add a nylon lock nut on the backside of the blind nuts for insurance against vibration loosening the engine bolts.
I made some 1 ¾” standoffs from 1.125” dia hardwood dowel to position the engine prop hub about ¾” in front of the cowl. Lots of room to install the ignition on top of the motor box and the throttle servo under the box. See pics.
Cowl installation is typical. Tape a template to locate the muffler cutouts and then transfer the locations to the cowl. I opened up the cowl bottom for cooling and added some baffles to reduce the incoming air opening. There are no provisions for cannisters so the fuse has lots of room for the fuel tank. An 800cc tank is included but I really like using a 1 liter Fiji water bottle for my 100cc planes. It is transparent, lighter, and free after you drink the water. There is a good thread on this topic on Flyinggiants.
Attached Thumbnails
  • Click image for larger version

Name:	Nitro Yak54 052.jpg
Views:	263
Size:	69.2 KB
ID:	374072 69.2 KB · Views: 263

  • Click image for larger version

Name:	Nitro Yak54 053.jpg
Views:	246
Size:	49.3 KB
ID:	374073 49.3 KB · Views: 246

  • Click image for larger version

Name:	Nitro Yak54 054.jpg
Views:	253
Size:	57.9 KB
ID:	374074 57.9 KB · Views: 253

  • Click image for larger version

Name:	Nitro Yak54 057.jpg
Views:	254
Size:	67.1 KB
ID:	374075 67.1 KB · Views: 254

  • Click image for larger version

Name:	Nitro Yak54 060.jpg
Views:	257
Size:	67.6 KB
ID:	374076 67.6 KB · Views: 257

  • Click image for larger version

Name:	Nitro Yak54 056.jpg
Views:	257
Size:	40.5 KB
ID:	374077 40.5 KB · Views: 257

airbike is online now   Reply With Quote
Old 05-05-2011, 02:50 AM   #7
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default Mini Build thread and review for Nitro Planes 100cc Yak 54.

 
 
Landing gear & misc:
The plane comes with an aluminum landing gear that is straight, not raked forward as it should be. This located the main wheels a bit behind the leading edge and the fuse seemed to be tippy when rolling the fuse around. It was not so tippy after the stabs/elev were installed. The gear is very soft alum and I doubt it would hold up to the weight of the plane. I added a wire brace criss-crossed from the wheel pant to the opposite landing gear mounting bolt. This method should have some sort of spring or other shock absorbing device or the wires will have no give and pull out of the attachment. The video shows that one of the wire brace had pulled loose on the landing.
Having buddies in the hobby is nice as he had a fiberglass landing gear from an old QuiQue 102” Yak. This gear is raked forward and placed the wheels just in front of the LE and made for much better ground handling.
The tail gear assembly is more suited for a .40 sized glow plane but I wanted to see how long it would last. I installed it and it seems to be ok for now but I don’t expect it to last. Actually, the main wheels are also foam and I would recommend getting some replacements from Dubro or Sullivan.
Attached Thumbnails
  • Click image for larger version

Name:	Nitro Yak54 081.jpg
Views:	205
Size:	39.5 KB
ID:	374078 39.5 KB · Views: 205

  • Click image for larger version

Name:	Nitro Yak54 015.jpg
Views:	189
Size:	75.9 KB
ID:	374079 75.9 KB · Views: 189

  • Click image for larger version

Name:	Nitro Yak54 069.jpg
Views:	150
Size:	100.7 KB
ID:	374080 100.7 KB · Views: 150

  • Click image for larger version

Name:	Nitro Yak54 070.jpg
Views:	155
Size:	83.0 KB
ID:	374081 83.0 KB · Views: 155

  • Click image for larger version

Name:	Nitro Yak54 071.jpg
Views:	208
Size:	23.8 KB
ID:	374082 23.8 KB · Views: 208

  • Click image for larger version

Name:	Nitro Yak54 088.jpg
Views:	168
Size:	58.3 KB
ID:	374083 58.3 KB · Views: 168

airbike is online now   Reply With Quote
Old 05-05-2011, 03:18 AM   #8
MODE 1
.
 
Join Date: Jul 2008
Posts: 4,714
Default

Hi Airbike
Hows the wing tube on this model? Couple of threads on here about guys lightening these models due to their overweight build quality but the main wing tube is very small in diameter and is a concern to them. 1" if I remember correctly. The tube has bent on several of these planes during sedate flight.
MODE 1 is offline   Reply With Quote
Old 05-05-2011, 10:21 AM   #9
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default

Hi Pete,

A local flyer has the Nitro Planes Sukhoi and that plane only had a 1" dia wing tube.

This Yak 54, on the other hand, has a massive 1.5" dia x .080t x 45 1/2 " alum wing tube, weighing in at 1 lb - 9.0 oz.

As noted above, the stab tube is rather small at .475" dia x .035t x 18.75" @ 1.6 oz

Of course, if you allready have a carbon tube, you can get over a pound of weight savings.
The alum V2 wing tube from the Hangar 9 35% Extra 260 would be a good replacement also.

I did read some of those threads about the weight reduction on the Nitro planes Sukhoi, so there are quite a few things one can do to lighten it up.

As it is now, I would say only the stab tube needs to be reinforced for some hard flying.
airbike is online now   Reply With Quote
Old 05-05-2011, 10:28 AM   #10
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default

more pics

I added short lengths of alum tube over the canopy hatch dowels as they seemed too small and probably wouldn't hold up to vibration.
Attached Thumbnails
  • Click image for larger version

Name:	Nitro Yak54 009.jpg
Views:	355
Size:	78.7 KB
ID:	374116 78.7 KB · Views: 355

  • Click image for larger version

Name:	Nitro Yak54 020.jpg
Views:	279
Size:	38.6 KB
ID:	374117 38.6 KB · Views: 279

  • Click image for larger version

Name:	Nitro Yak54 075.jpg
Views:	319
Size:	88.2 KB
ID:	374118 88.2 KB · Views: 319

airbike is online now   Reply With Quote
Old 05-05-2011, 10:46 AM   #11
airbike
Super Contributor
 
Join Date: Jan 2006
Location: Walnut, Calif
Posts: 386
Default

Oh, I forgot the usual ...the plane comes in one box ( which was surprising as I expected a separate wing box).

Its the box behind the Krill Yak 55.

Just to note, I had just built a Krill Yak 55M for a friend and a Pilot RC Edge w/DA120 for myself. I am not comparing the Nitroplanes Yak to either of these planes as they are not anywhere close in terms of their price points.

Anyone considering this Yak 54 must realize how they intend to fly it. IMO it really is not marketed at hard core 3D flyers or serious IMAC flyers. There are a lot of pilots that really couldn't care less about IMAC and 3D but would like to fly giant scale just for the fun of it.
Attached Thumbnails
  • Click image for larger version

Name:	Krill Yak55 003.jpg
Views:	331
Size:	77.4 KB
ID:	374120 77.4 KB · Views: 331

airbike is online now   Reply With Quote
Old 05-05-2011, 10:00 PM   #12
krayzc
Bad-ass Super Contributor!
 
krayzc's Avatar
 
Join Date: Mar 2007
Location: Kannapolis, North Carolina
Posts: 2,863
Default

way to pass the scoop
krayzc is offline   Reply With Quote
Old 05-06-2011, 08:57 PM   #13
The_Tinker
Whatever you are, be a good 1!
 
The_Tinker's Avatar
 
Join Date: Oct 2009
Location: United States, CO, Delta
Posts: 229
Default

So glad you're doing this. I've always been curious about these planes. At first glance I nearly fell out of my chair. You're putting a DA in a NP yak??!!! lol. I soon saw what you were doing and realized you probably had one sitting around from a different project. Looking forward to hearing more from you.

Micah
__________________
Success is measured, not by comparing yourself to someone else, but rather by comparing yourself to what you could have been. - Zig Ziglar
The_Tinker is offline   Reply With Quote
Old 02-04-2012, 05:43 AM   #14
Beat
Flyin' Around
 
Beat's Avatar
 
Join Date: Aug 2010
Posts: 32
Default

Hi everybody
Talking about engines sitting around, would you think this airfraime would handle a ZDZ120?
I'm looking for something just for fun, not for wild 3D!
(I know this is a older thread)

Beat

Last edited by Beat; 02-05-2012 at 03:54 AM.
Beat is offline   Reply With Quote
Old 04-29-2012, 12:11 AM   #15
bobzilla
EVFlyersBoss
 
bobzilla's Avatar
 
Join Date: Apr 2006
Location: United States, NV, Boulder City
Age: 65
Posts: 1,592
Default

Can you tell me what you final cg was..thanks
__________________
bobzilla -evflyers - president

http:www.evflyers.com
"My DX18 is sexier than your DX18!"
I'm a Spektrum fanboy who blatantly lies to promote my crap!!
bobzilla is online now   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools



All times are GMT -5. The time now is 07:56 PM.

All Flyinggiants.com content copyright 2006-2014 by RCGroups.com, LLC except where otherwise indicated. The Flyinggiants.com logo is a trademark of RCGroups.com, LLC.
Please report any misuse of our trademarks or copyright violations using the contact form.
RCGroups Network :: RCGroups :: The E Zone :: Lift Zone :: RC Power :: Crackroll :: RC Cars

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.