New Projects - Page 2 - RC Groups
Shop our Airplanes Products Drone Products Sales
Thread Tools
Apr 09, 2013, 01:19 AM
Registered User
rowdyjoe's Avatar

Unboxing the Ultimate


I finally began unboxing my Great Planes Ultimate 160 tonight and all I can say is WOW !!! I thought it looked good in the pictures but, it's absolutely gorgeous in person and I haven't even taken the plastic off the parts yet. That big red fuselage sitting in the box looks enormous and just blew me away. I pulled all of the hardware out of the box and put the bags in separate containers.
It appears to be very well built ....very solid. I felt around the the parts to find out how much of it is sheeted and I'm quite happy with it. It feels strong and looks strong.
I'll probably start assembly tomorrow or Wed. I need to complete some honey-do's before I start on it or "the boss" will not be happy. Once I start I don't like to stop. At my age, I might forget where to start again.
I'm really looking forward to getting it in the air.

Garry
Last edited by rowdyjoe; Apr 09, 2013 at 02:30 PM.
Sign up now
to remove ads between posts
Apr 16, 2013, 02:40 AM
Registered User
rowdyjoe's Avatar
Hey, I started assembly last week and got the lower wing assembled and the servos mounted in it. The last couple of days I've been working on the fuselage. I got the gear under it and the engine mounted (52cc Turnigy) and the elevator and rudder servos mounted. It's looking more like an airplane everyday.
Oh yeah, I got the cabane struts mounted too. I'm not exactly following the manual but, I like to get them standing on their legs as soon as I can. I'll mount the horizontal and vertical and install the elevators and rudder next and then build the upper wing.
I have limited space on my bench and I'm running out of room. Each wing is 65" long but, the fuselage is shorter and easy to move around so far. Once I get the tail feathers on it I may be really pressed for space. I'll install all of the innards before I assemble the wings to the fuselage as it's much easier to do without them attached.
This bird will be comparatively easy to assemble at the field as the wings detach and assemble via a thumb screw system in the wing struts. It will take longer to put together than my 50cc Edge but, easier than most other biplanes this size.
I LIKE it !

Garry
Last edited by rowdyjoe; Apr 16, 2013 at 03:07 AM.
May 03, 2013, 06:15 PM
Registered User

Sig Wonder


Not nearly as sophisticated as many of the other projects I see in the Thunderbirds, but I've finished my Sig Wonder that another member here gave to me a couple of months ago. It will take its first flight probably next weekend. It's finished in turquoise ultracote and black and white monokote.



Jun 05, 2013, 08:50 PM
Registered User
rowdyjoe's Avatar

Seagull AT-6 Texan


I just made a trade for a NIB Seagull Texan 120 (82" WS). I plan to install my Zenoah G20 on it. All up weight is supposed to be around 13 lbs and the G20 should pull it in fine style. I'm in contact with a guy in East Texas who has the same plane with the same engine and he says it does very well.
I also plan to install the 60-120 size Etracts on it and decent digital servos. However, it will be a while before I get "roundtoit" because I still haven't finished my GP Ulimate 160 yet.

Garry
Last edited by rowdyjoe; Jun 05, 2013 at 09:08 PM.
Jul 10, 2013, 02:19 AM
Registered User
rowdyjoe's Avatar

GP Ulitmate 160 - Assembly Update


It's been too hot for this old man to fly so, I've been working on the completion of my Ultimate Bipe. I've mounted the fuel tank and plumbed the lines to the carb, etc, and mounted the Smart Fly regulator, receiver, CDI box, and switches. I still need to assemble the servos and mount the top to the cabane struts and tidy up the wiring inside so it won't resemble a rats nest. I also need to rig a manual choke and cut the cowl to fit.
I'm waiting for two new LIFPo batteries to come in so I can test the mounting positions for CG.
I'll keep working on it until it's finished now so I can start assembly of my next project ....a Seagull AT-6 Texan 120 with 82" span.

Garry
Jul 10, 2013, 09:02 PM
Registered User
rowdyjoe's Avatar

The Wings are ON !


I assembled the upper wing today after installing the ailerons, servos, and linkage. The instructions push you to hurry while joining the wing halves so the epoxy doesn't dry until after you mount the upper wing and join it to the lower wing with the "I" struts. I managed to get it all done in plenty of time and carried it out to the yard for some pictures. The epoxy is still curing so I carried it by the fuselage and gear. I'll let it cure over night before I remove the wings and finish the servo leads to the receiver. I'm still waiting for my batteries but, it should be ready to fly some time next week. Waiting for the batteries will give me a chance to mount the cowl, canopy, and check it over closely.

Garry
Jul 13, 2013, 03:00 AM
Registered User
rowdyjoe's Avatar
Well, the Ultimate is finished with the exception of CG balance and mounting the pilot and canopy. I'll install the wings tomorrow and test run the engine to see what it needs after setting up for a few months.
I'll post some pics tomorrow when it's assembled ...and maybe a little video of the engine run.
The weather folks are predicting cooler weather and decent winds next week and if they're right, I might be able to get the first couple of flights on it.

Garry
Jul 14, 2013, 01:58 AM
Registered User
rowdyjoe's Avatar
Update on the Ultimate 160 ....
CG check was right on the factory spot without adding any weight or shifting anything around. I'm very fortunate in that area. Hope she flies well at that CG station.
I haven't weighed it but, it feels light even with 1/2 tank of fuel. The fuselage is not double boxed framed which saves some weight but, it's built well and strong. It's actually surprisingly light for a Great Planes model. I'll try to find an accurate scale large enough to weigh it.
The engine (Turnigy 52cc w/approx. 4.5hp) run went fine after replacing the crankcase vacuum line. The first tubing I tried was a bit too large in diameter and kept slipping off. I replaced it with smaller tubing and it's working fine now. The engine tuned up fine and I ran it for about 30 or 40 min. at various power settings while tweaking and trying to eliminate the four stroking. I got it real close but, this engine is spitting a bit of oil as if it's not quite broken-in yet. On the other hand, I think I remember adding a bit too much oil to this can and that may be causing it to spit a bit out.
It's running smooth with a 20.5x8 (modified) Biela prop (thank you Benny). By the time I quit tonight it was too dark to use an optical tach so, I'll have to do that another time. It pulls fine but, I'll try other props to find the optimum performer. I think a 20x8 or 21x8 will be best but, I need a brand of prop with a broad hub as this engine has a 3 bolt prop bolt pattern and I've found that some prop hubs are just too small. The holes drill out very close to the edge of the hub of some brands. The Biela has a wide hub and I think RCG props from BP hobbies do too. I've tried Zoar props (my favorite woodies) with this engine but, the hubs are too small. I'll keep checking.
I found something odd when I connected all of the servos and function checked them. The servo in the top right aileron of the upper wing is backwards. It's mounted and connected the same way the other 3 servos are but, it functions in reverse. In other words, when moving the stick to the right for a right turn, the bottom servo moves up but, the top servo moves down. All four servos are HS-625MGs. It's not marked any different than the others, it just operates backwards. So, the first flight will have to wait until a new servo arrives.

Pilot and canopy are installed and, after servo replacement and aileron alignment, it will be ready to fly. Maybe by the end of next week.

Garry
Jul 14, 2013, 11:58 PM
Registered User
rowdyjoe's Avatar
It finally dawned on me that I can swap my "backward" aileron servo with one from the elevator. I can then reverse my backward servo with the radio. So, tomorrow I'll do that and have it ready to fly when the rain stops ...which I hope isn't for two or three days. We need the water.

Garry
Jul 15, 2013, 06:16 AM
Registered User
Capt. Roll's Avatar
Good plan on switching the servos Garry.........should work perfectly. It's going to look great in the air.

Have you done a range check yet between the TX/RX?

I agree on the rain........glad we are receiving it this time of year. I'm hoping to slip in some flying Tuesday or Wednesday evening if we have a break in the rain.
Jul 15, 2013, 01:03 PM
Registered User
rowdyjoe's Avatar
No range check yet. I'm still trying to get everything working correctly at "close range" right now.

By the way, while browsing Tower Hobby's web site the other night I noticed they have discontinued this great airplane. I'm sad to see it go. I understand it's had a very successful 8 yr. run.

Garry
Jul 18, 2013, 11:02 AM
Registered User
rowdyjoe's Avatar
I swapped out the wrong-way aileron servo with one of the aileron servos and all is working as it should. During the process I discovered a bad servo extension and replaced it. I was getting some odd reactions to the engine run the other day (controls twitching, etc.) and I needed to fix that issue. I hope replacing the bad extension has solved the problem but, will give it a thorough check out before first flight.

Garry
Jul 26, 2013, 01:29 AM
Registered User
rowdyjoe's Avatar
Sadly, I have to report that the Ultimate crashed on the first flight yesterday (Thurs). On approach to my second landing attempt the nose suddenly pitch up slightly and then violently dropped straight down. It crashed in from about 20 ft. up and demolished the airframe and broke the carb mount off the engine. I suspect it was a receiver glitch as the installed receiver had been through a crash in one of my other planes. I knew better than to fly with that receiver as it had glitched on the ground during an engine run. I found and replaced a bad servo extension and thought I had fixed the problem but, intended to change the receiver also to make sure. In my haste, I forgot to replace it and ended up destroying a very nice plane.
First flight was going very well although I thought it needed a bit more prop pitch to increase speed. Take-off was very good and it only required about 3 clicks of right aileron. The first landing was a "one bounce" affair and the gear handled it very well with a very controllable 2nd takeoff from the touch and go roll-out. It tracked straight in the air and the engine ran well and the prop pulled well with plenty of vertical. It handled inverted flight with barely a touch of down elevator. Low rates on aileron were not quite enough but, a flip of the switch to high brought them to life and the roll rate was very nice.
I would definitely buy another one but, Tower has discontinued them within the last two weeks. So, unless I can find a place that has one left in stock I won't be able to replace it.
It appears the gremlins are still with me.

Garry
Jul 30, 2013, 07:02 PM
Registered User
rowdyjoe's Avatar

New Bird


I recently ordered a small 70" Extra 260 from General Hobby and plan to mount my RCG 15cc engine on it. The plane weighs less than 9lbs AUW and my engine should be a good match for it at 2.1 HP.

In comparison, I had a Seagull Yak 54 (same weight but, smaller plane) with a 26cc engine and thought it was a bit over powered. I had to prop it down to reduce the torque effect in up-lines and it was still tough to keep it straight.

I looked around a bit before I bought this plane and most everything else in this size (70" to 73") weighed 10 + lbs. and called for a 26cc to 30cc engine. So, basically I bought an airplane to fit the engine I have.
I considered the Great Planes Revolver 70" (same weight and size) but, wanted something scale for IMAC. I watched a YouTube video of a Revolver 70" with a 15cc RCG on it and performed very, very well so, I'm confident the engine will fly my new plane through the maneuvers with no problem.

The Post Office says it should be here Monday (8/5) and I'll post a note about the quality, etc. after I take a look at it.

Garry
Jul 30, 2013, 07:39 PM
Registered User
Capt. Roll's Avatar
Looks nice in those pictures. You'll be busy getting it ready this coming week for the IMAC on the 10th and 11th.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Carrotcake's NEW RC8T"e" project(s). New/Current owners Welcome-tips/info. carrotcake Electric Power Cars 423 Oct 20, 2014 09:54 PM
Discussion New scale boat project jimmy777 Scale Boats 7 Jan 28, 2013 03:37 PM
Discussion My Scale Project Overview Since 2009 catcat Scale Helicopters 4 Jan 17, 2013 12:15 AM
Discussion Im New, Asking some questions about my new project me madjoe 90 1/2A Planes 19 Jun 07, 2011 12:44 AM
Discussion New Project = new problems !! danny_boy Dock Talk 4 Oct 23, 2008 12:38 PM