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Goldberg Tiger Club

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Old 09-19-2012, 08:07 AM
  #176
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Default RE: Goldberg Tiger Club

Yes Ed I have a few suggestions.
One, I would plan on installing two dowels in the wing leading edge instead of the single dowel.
Two, If your flying skills are average, I would suggest taking some of the dihedral out of the wing.
Three,run some triangle stockon the inside corners of the fuse to eliminate a lot of the tail flex that Tigers have.
With the additional rudder and elevator you plan on making (good idea), build light as it will ultamately mean adding 3 times the amount of lead in the front to balance her out.
Lastly, the 91 should be a good power plant for the Tiger, but if you didn't buy the engine yet I wouldn't be afraid to go larger. Maybe Saito100
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Old 09-19-2012, 08:48 AM
  #177
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Default RE: Goldberg Tiger Club

I really like the Idea of a gasser in the Tiger...Increasing the size of the tail feathers is a big help..I have done that...Taking out about 1/2 the dihedral is okay,I couldn't tell much differance but maybe a bit..I would need both together to tell....Building on a cowl looks so nice...I tail dragger all mine...I build mine in a jig so they get relly well glued. I havent had much of a tail flex problem so I havent tri stocked anywhere but the firewall...and where the Landing gear is going to attach...I think it is a good Idea though except they are already tail heavy....Putting a gasser in just might cure that problem though...I have a DLE 20 I might try in my next Tiger 60..I think I will build another this winter...I would like a smaller Gasser..The DLE 20 is pretty powerfull...They say they are suited to sport planes in the 9 to 13 lb range....That is a strech for the Tigers I build , They also say good for 90 to1.20 size planes...Well although they are a 60 we treat them like bigger planes so maybe a DLE 20 is worth a try...I dont usually over power but I really like the economy of gassers...I dont want to buy any more motors..
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Old 09-19-2012, 08:52 AM
  #178
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Default RE: Goldberg Tiger Club

put an extra 1/4" ply firewall in there.

making the nose longer would make room for a larger gas tank.

perhaps some doublers by the front of the wing and the rear of the wing. the fuse is weak at these points.

make a dual front wing mount pin. or at least glass up the single.

how about a canopy that opens? has anyone done this on a tiger.
I was thinking of one that is cut in half just behind the pilot with the front half opening on a hinge at the leading edge of the canopy. servo actuated of course.
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Old 09-19-2012, 02:05 PM
  #179
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Default RE: Goldberg Tiger Club


Quote:
ORIGINAL: nh4clo4

You don' t even need wings with that up front

I have a tiger 60 wing kit, and the plans, I am going to scratch build the fuse and tail.

I have a 91 4 stroke lined up for it.

For the mods,
A - larger rudder and elevator.
B- tail dragger
C-remove at least one rib bay
D-move the wing back 3/4''-1'' (to aid in balancing)
E-possibly cowl it.


Any other suggestions?

Ed

I would stretch the nose to correct the balance. also long coupling will smooth out your flying
do some math.... 2.2" stretch would be like adding about 4 oz of lead to the firewall

weight of engine x the distance from the CG is the moment.

weight of engine x the distance to CG + the weight added lead x distance to CG = weight of engine x new distance required
or 21oz x 13.5" + 4 oz x 11.5" = 329.5 = 21 oz x 15.7"

moving the wing back will make elevator input more abrupt...
the long tail makes smooth pattern plane flying
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Old 09-19-2012, 02:22 PM
  #180
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Default RE: Goldberg Tiger Club

After looking at the plan, stretching the nose would be better, my fuse will be different since I am scratchbuilding it, and Ialready had decided to do 2 dowels up front.

Keep the suggestions coming!!!
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Old 09-19-2012, 02:32 PM
  #181
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Default RE: Goldberg Tiger Club

Just hypothetical.

how about taking a long drill and drilling stright back basically right at the top engine mount bolts back into the fuse all the way past the canopy. then put carbon fiber tubes in the holes and epoxy them to the insides of the fuse sides. not cheap but i think this design could use this strength.
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Old 09-19-2012, 02:53 PM
  #182
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Default RE: Goldberg Tiger Club

C/F arrow shafts will work fine, build them into your next TIGER

C/F arrow shafts are available at you local archery shop
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Old 09-19-2012, 03:28 PM
  #183
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Default RE: Goldberg Tiger Club

did I already share my trick about using titebond wood glue with milled fiberglass?

mix it until it gets really thick. like pancake batter. hotcakes, pancakes, waffles, whatever you are familiar with.

oh and I drilled and placed a "voltwatch" or hobbyiking equiv on the floor of the interior. It would be cool to recess it into the dash to makes the lights appear through the instruments.

make gauges out of drilled holes in plywood with rubber Orings glued in and Laser printed gauge faces
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Old 09-19-2012, 04:42 PM
  #184
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Default RE: Goldberg Tiger Club

I got my Tiger 60 today! Next week I'll start the build, with all the mods I did on my Tiger 2. The big question is OS 61 FX, or old style Super Tigre 60? I have one of the OSs, and two of the STs. All are great runners, and the STs are a bit heavier.
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Old 09-19-2012, 04:44 PM
  #185
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Default RE: Goldberg Tiger Club

I have two of the 61FX and they seem to perform and tune very well.
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Old 09-19-2012, 05:20 PM
  #186
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Default RE: Goldberg Tiger Club

Ipick those up at Walmart. I primarily use them for pushrods, use a 90 degree bends and kevlar thread and ca the metal rod to it. Just like the old balsa pushrods, except lighter stronger and stiffer.
ED
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Old 09-19-2012, 07:50 PM
  #187
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Default RE: Goldberg Tiger Club

ok i reinforced the front of the fuse and setup new landing gear.

Also setup for throttle pushrod.

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Old 09-20-2012, 06:25 AM
  #188
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Default RE: Goldberg Tiger Club

Put me down as a Tiger fan. Attached are a couple of shots of my Tiger II powered by an OS .46 AX.
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Old 09-20-2012, 06:30 AM
  #189
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Default RE: Goldberg Tiger Club

very nice work lkruse!!

Bill S.
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Old 09-20-2012, 06:56 AM
  #190
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Default RE: Goldberg Tiger Club

I made a little progress on my Tiger 60 ARF last night. I have the aerilon glued on and the JR 4031 servos in the wings. I'm now planning on what I want to use to make the pushrods. I think this time I am going to use ball links on the servo arms and 4-40 clevis on the control horns.

Also thinking about using an arrow shaft with two rods on it for the elevators instead of using the link bar. Has anyone done this also?

I'm using a Webra P-5 90I ignition engine so I should have enough weight in the front to balance and also making it a tail dragger. How does this plane balance? Tail or nose heavy.
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Old 09-20-2012, 07:49 AM
  #191
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Default RE: Goldberg Tiger Club

I'm still undecided about building the tiger 120.

Having never flown any size tiger, I'm not sure just how acrobatic it is and am worried I will get board with it too fast.

So, what can one expect from a Tiger???

Thanks,
Bill S.
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Old 09-20-2012, 08:08 AM
  #192
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Default RE: Goldberg Tiger Club

The smaller Tigers are probably going to be a little more acrobatic but I think All Tigers are fairly Areobatic...It depends what you are looking for...Are you a pattern flyer? Tigers are classed as Low wing Trainers but I Find them much more than that...I have been flying for a lot of years and I never get boared with my tiger...It is easy to fly though...You can have so much fun with it...There are probably faster more areobatic planes out there like maybe the Ultra Sport for instance but for all around fun the Tigers are hard to beat in my opinion...
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Old 09-20-2012, 08:16 AM
  #193
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Default RE: Goldberg Tiger Club

Sorry Double Post
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Old 09-20-2012, 12:38 PM
  #194
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Default RE: Goldberg Tiger Club

I was very lucky with my Tiger 40. I had it for over nineteen years. This model survived four students. My Tiger suffered from
aileron flutter until I cut the ailerons to 1.25 inches constant cord. Recently, my friend flew it inverted and my Tiger experienced
a sudden stop.
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Old 09-20-2012, 12:59 PM
  #195
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Default RE: Goldberg Tiger Club

everybody falls in love with them. Its more of a pattern craft than an acrobatic plane. it will not spin like an Extra or a Yak.
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Old 09-20-2012, 01:08 PM
  #196
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Default RE: Goldberg Tiger Club


Quote:
ORIGINAL: lkruse

Put me down as a Tiger fan. Attached are a couple of shots of my Tiger II powered by an OS .46 AX.
lkruse #41


Very nice art work, super sanitary, Great job. This is what a top flight contender wishes it was.
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Old 09-20-2012, 01:11 PM
  #197
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Default RE: Goldberg Tiger Club

Quote:
ORIGINAL: Dave

I was very lucky with my Tiger 40. I had it for over nineteen years. This model survived four students. My Tiger suffered from
aileron flutter until I cut the ailerons to 1.25 inches constant cord. Recently, my friend flew it inverted and my Tiger experienced
a sudden stop.

Dave #42


Ouch, sounds like a problem with either A. excessive landing speed or attitude. B. Lack of flair at touchdown. or C. Poor selection of flying companions.

Any interest in building another?
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Old 09-20-2012, 01:17 PM
  #198
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Default RE: Goldberg Tiger Club


Quote:
ORIGINAL: computermonkey

I made a little progress on my Tiger 60 ARF last night. I have the airlons glued on and the JR 4031 servos in the wings. I'm now planning on what I want to use to make the pushrods. I think this time I am going to use ball links on the servo arms and 4-40 clevis on the control horns.

Also thinking about using an arrow shaft with two rods on it for the elevators instead of using the link bar. Has anyone done this also?

I'm using a Webra P-5 90I ignition engine so I should have enough weight in the front to balance and also making it a tail dragger. How does this plane balance? Tail or nose heavy.

Almost always Tail Heavy. its a long lever. Please post some pics.

on the Aileron linkages, I would use metal clevises on both sides. 4-40. rubber fuel line to keep clevises locked. when you get them setup and set to zero trim on the radio then put a dab of CA on the threads.

for pushrods try Sullivan Golden rods in the 1/4 scale size. $11 per package. These have the black plastic tubes and the gold platic inserts. come with 4-40 hardware and plenty strong for this plane with a giant engine.
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Old 09-20-2012, 01:30 PM
  #199
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Default RE: Goldberg Tiger Club

nice navagation maps there Ikruse
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Old 09-20-2012, 03:17 PM
  #200
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Default RE: Goldberg Tiger Club

VERYNICE
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