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TF FW190 GIANT ARF

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TF FW190 GIANT ARF

Old 06-28-2017, 04:03 AM
  #4426  
dasintex
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What about Sierra Gear as a good replacement to Robarts or CJM?
Old 06-28-2017, 05:24 AM
  #4427  
BobH
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Sierra is undoubtly the best gear of the three. As for a direct replacement I think you would need to do some modifications to the mount for it to drop in.
I have a Buddy who uses Sierra in his FW and it seems to work ok ..
Old 06-29-2017, 02:49 AM
  #4428  
Tony Gag Jr.
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Default Cjm

Originally Posted by SteveD-RCU
You were right Tony,very poorly designed and constructed,I just sent a email to Bruce about my disappointment.I should have followed this thread a little better ,I probabily wouldn't have bought them..
Sorry man. Good luck getting a refund, it was not an easy task.
Old 06-29-2017, 08:32 PM
  #4429  
Spychalla Aircraft
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Originally Posted by dasintex
What about Sierra Gear as a good replacement to Robarts or CJM?
Check p.173 post #4312. I detail the whole Sierra Gear installation. You have to change your wing dihedral to a scale configuration but it's not that hard. The Sierra Gear are fantastic! The best! Leo
Old 07-03-2017, 10:42 AM
  #4430  
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Default Weight & Balance

For Saito FG84 users: how did your plane come out with this engine?

I have done some preliminary weight and balance with a Vanessa rig and after measuring CG twice ( upside down and normal with gear retracted of course ) I am tal heavy by a bit more than 1/2 inch back!. CG as per the manual is 139mm from LE.

Battery packs are not yet installed, which I was going to put at the front, but after these tests even with the batteries I am not on the suggested CoG.

I would have thought that with this powerplant If anything I would be nose heavy but not tail heavy!.

Have done lots of work on this model, fiberglassed, scaled and weathered to the limits and many more things. I even opened cowl adding inspection hatches on both sides to access the engine which added mor weight due to the copper hinges I made.

weight is 12.5kg so far.
Old 07-03-2017, 10:43 AM
  #4431  
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Default Weight & Balance

Double post

sorry
Old 07-03-2017, 11:34 AM
  #4432  
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Did you remove the steel plates that are mounted to the firewall?
Old 07-03-2017, 12:42 PM
  #4433  
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Originally Posted by khoysagk
Did you remove the steel plates that are mounted to the firewall?
Absolutely!

I took them out at the beginning of the build as most people fitting this engine did so @3.5Kg all in.

I even measured CG twice upside down and normal and got the same results..
Old 07-03-2017, 01:38 PM
  #4434  
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Well then maybe it's the fiberglassing and stuff. Mine is stock but I did cut the firewall and set it back about half an inch and it came out a little nose heavy.
Old 07-03-2017, 01:45 PM
  #4435  
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Originally Posted by khoysagk
Well then maybe it's the fiberglassing and stuff. Mine is stock but I did cut the firewall and set it back about half an inch and it came out a little nose heavy.
yeah, I also cut the firewall and did the same to get more clearance for the Keleo ring exhaust.
Old 07-04-2017, 05:22 AM
  #4436  
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Regarding the Center of Gravity on this plane, from a post a long time ago in this thread #1849,
"Also, since I am using the Saito FG57T the CG was further forward than need be. It balanced on the factory indicated spot.
But I did the calculations myself directly on the wing and found the factory spot to be a little more than 1.5" ahead of where I calculated it should be.
Yes the plane flew well in that configuration, but I have since removed both ballast plates on the firewall and the plane has gotten even better in the flying and ground handling department.
I think that with the load of ballast off the nose the tailwheel is now better planted when the tail drops, giving me better control on the ground."

So, yes. I moved my balance point aft by 1.5" as compared to the instructions.

http://www.rcuniverse.com/forum/rc-w...l#post11552405

As previously mentioned, I switched to an FG60R3 and the plane is still flying just as it did with the FG57. This thing is a blast to barnstorm with.
Old 07-04-2017, 07:08 AM
  #4437  
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Loco3D, Regarding the CG with the FG-84 Triple. I built one with the stock finish as an ARF and I had to mount my RX battery packs just behind the wing. I had taken the firewall plates off. So it was considerably nose heavy. I proceeded to crash the airplane on the first flight having reversed the Ailerons so I never got the chance to see how she flew. I am building a brand new one now with an FG-57 Twin, looking so forward to flying this airplane! Leo
Old 07-04-2017, 08:06 AM
  #4438  
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Originally Posted by Spychalla Aircraft
Loco3D, Regarding the CG with the FG-84 Triple. I built one with the stock finish as an ARF and I had to mount my RX battery packs just behind the wing. I had taken the firewall plates off. So it was considerably nose heavy. I proceeded to crash the airplane on the first flight having reversed the Ailerons so I never got the chance to see how she flew. I am building a brand new one now with an FG-57 Twin, looking so forward to flying this airplane! Leo
"Ground Check" mate - even with my 50 buck foamies...

BJ
Old 07-05-2017, 04:29 AM
  #4439  
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Originally Posted by Reverend
I have the same setup. I needed 120g of weight next to the tail wheel. Flies dead straight.

Rev
did you cut the firewall before installing the FG84?
Old 07-08-2017, 02:39 PM
  #4440  
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After flying my first one with a da 50 for 3 years I thought the new one should sound a little better.


Old 07-09-2017, 08:37 AM
  #4441  
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That does sound good!

Brian
Old 07-10-2017, 05:11 PM
  #4442  
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Originally Posted by Spychalla Aircraft
Check p.173 post #4312. I detail the whole Sierra Gear installation. You have to change your wing dihedral to a scale configuration but it's not that hard. The Sierra Gear are fantastic! The best! Leo
I second that my use sierras' are goin in this puppy now!
Old 07-11-2017, 11:55 PM
  #4443  
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The TF 190's is now yellow 3. Only the horizontal stab's and rudder are left with monokote;
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Last edited by kwik; 07-11-2017 at 11:58 PM.
Old 07-13-2017, 12:27 AM
  #4444  
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Originally Posted by sparky4lawndart
... locally we grind out the pins on Robart trunions and use 1/4 inch hardened steel pins as replacements (and a mig welder). I've used drill bit shafts (very tough) and others get high grade steel rod from places like McMaster/Carr, etc...
One of the guys found a guy that'll mig weld the new pins in for $20 (you can find welders anywhere)
Yes.... The bolt with hardness 8.8 bendt slightly, too. I wouldnt have believed it possible, but...it did.

So, now Im following the adwise of trying a drillbit. I could, after all, just remove the bolt, and put in the drillbit. I just glued it in place using epoxy. hehe. After all, the epoxy's job is to just stopping it from sliding up and down in an otherwise quite tight hole. I hope for the best.
Old 07-13-2017, 02:51 PM
  #4445  
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hi kwik, i used both the 8.8 allen bolt and the drill bit. the drill bit eventually shattered and snapped off from a hard landing. the allen bolt has held out for me but i have been very carefull about my landings. sooner or later i'm sure the allen bolt will bend but i think it is better than having the retract fold like when the drill bit snapped. so far the allen bolt is winning in my robarts. i have just ordered the laser cut adapters for the sierra retracts from skyshark rc they should be here tomorrow and i will be done with the robarts once and for all.the epoxy may be the way to go with the drill bit. maybe mine got too brittle when i welded them in?
Old 08-19-2017, 04:14 PM
  #4446  
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Default Balance

Sorry if this has already been covered but I could not find it in the forum. How have you all balanced the 190? The instructions show inverted with the gear extended but because the way gear extend slightly forward when they are down it makes sense to me to balance it inverted with the gear retracted.

Thanks,
Tony
Old 08-20-2017, 05:29 AM
  #4447  
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I did just as you intend.
Gear up and inverted. With the fg57t and the fg60r3, I have it balanced aft of the factory spec with the steel plates removed from the firewall box. Flies great, and does dynamite tail slides.
Old 08-21-2017, 02:43 AM
  #4448  
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Balanced mine with gear retracted
Old 09-03-2017, 03:00 AM
  #4449  
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The TF 190 at a flyin this weekend. With a TF Zero in the background;

The drillbit shaft works very well as gear-pin. It is strong enough even just glued in place with epoxy.

Of course, this time I got problems with the not-repaired leg. I think its bendt too.

So the first flight ended with a belly landing. Second flight was with gear out.
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Old 09-04-2017, 07:16 PM
  #4450  
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Originally Posted by kwik
The TF 190 at a flyin this weekend. With a TF Zero in the background;

The drillbit shaft works very well as gear-pin. It is strong enough even just glued in place with epoxy.

Of course, this time I got problems with the not-repaired leg. I think its bendt too.

So the first flight ended with a belly landing. Second flight was with gear out.
What size of drill bit works?

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