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Top Flite B-25 ARF (Tecnical, tips, suggestions)

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Top Flite B-25 ARF (Tecnical, tips, suggestions)

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Old 12-08-2007, 06:26 PM
  #751  
norm
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Europact.

Page 19 posting #452 and page 23 post #575 of this thread will answer some of your questions. I have flown this plane 5 times so far, would have flown more but we have a record snow falls so far and so much... for the props go back to post #11 page for different engine setting. The only thing I must add is that the CG should be made gears up if you intend to use retracts and heavier wheels. When the gears retract the cg moes aft significantly enough to make the plane tail heavy and become unstable. Another Gremlin is the servo hatch for the ailerons and flaps. They need to be reglued and you may put some 2 sided tape to secure your servos. This is only minor details that could be overlooked by some but i think should be adressed.
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Old 12-08-2007, 07:54 PM
  #752  
timothy thompson
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

more pics
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Old 12-08-2007, 10:00 PM
  #753  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Where can you get the scale cockpits at?
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Old 12-08-2007, 10:30 PM
  #754  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

i scratched all that myself. dynamic balsa sells some nice ones they are very pricey though
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Old 12-09-2007, 09:46 AM
  #755  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Does anyone have any ideas on how to get the fog left by ca off the plastic tail gunners window? I tried one brand of ca remover and it made it worse.
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Old 12-09-2007, 09:56 AM
  #756  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Hi Sgoen

Try toothpaste sometimes brings perspex/glass pretty clear.

Ray
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Old 12-09-2007, 11:04 AM
  #757  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

the all wondorous future floor wax
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Old 12-09-2007, 12:15 PM
  #758  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

wd-40 can get it off sometimes.
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Old 12-09-2007, 01:39 PM
  #759  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

I just found out I am missing the elevator joiner wire. Anybody else have this problem? Where was it packed in the kit?
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Old 12-09-2007, 02:17 PM
  #760  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

it was in the hinge bag. its black so look carefully. if missing shoot tim and email
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Old 12-09-2007, 04:45 PM
  #761  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Thanks. I looked again and everywhere else in the box and no luck. Also I can't get my servo extensions through the plastic tube with the heat shrink on my connections. The rudder extension came up about a foot short. The manual says to connect a 24 inch extension and the elevator has a 36 inch which works fine. I guess I will add a 12 inch extension to the rudder so it will reach. I will probably add a bigger tube since this one is to small.
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Old 12-09-2007, 05:03 PM
  #762  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

You can fish 2 48 inch extention through the tube with the connectors shifted by 1 inch, it makes it to the back easy.
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Old 12-09-2007, 06:24 PM
  #763  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

more pics of bay door using nelson hinges. guys on the jet forum are telling me how to use air cylinders to run them, nice bunch of guys!
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Old 12-09-2007, 08:16 PM
  #764  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

I bought what the manual said to buy. I am not going to go buy a 48 inch extension. The heat shrink material is the problem. One connection by itself will not go through the tube with the heat shrink applied to it.
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Old 12-10-2007, 02:16 AM
  #765  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

If you are a competent solderer, just splice 48" into the servo lead - no plugs, no worries. Done right, it's more reliable, lighter, and in particular skinnier!

Hobby shop called today - it's FINALLY arrived.[sm=teeth_smile.gif] This will be the first shipment in Oz I believe - any other skippy's out there got one yet? Robart air set from Tower still on backorder though - anyone else have this problem??? Anyway, time to clear off the bench (and yet another 1/2-finished scratch build...) and have some fun.

Cam
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Old 12-10-2007, 07:46 AM
  #766  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

tim,
where did you get your hinges????

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Old 12-10-2007, 09:22 PM
  #767  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

nelson hobby 1/2 inch they are the best. here is the scale maechanism to open and close the doors one side already works great . Im sure ill have to fiddle to get the other side to close but thats ok. the servo is mounted to the other side of the bulkhead and moves the cam as per scale/ this will get covered up with a scale fitting. I had to move the n ose wheel servo up a little and ill refit that as soon as the doors are done
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Old 12-10-2007, 09:43 PM
  #768  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Tim,

Seems like you decided to go with a servo... Good call I' using a JR791 retract 260 oz servo for my bomb bay. It sounds like the real thing. I am using 2 bell crank with a wheel on the servo positioned in the middle super adjustments capabilities and scale operation. A servo in the back may be needed in the back also because the closing there is weak and may shake and shafe excessively in flight. Pics wiill be coming soon, my 7 year old daughter decided to bath with my camera!!! That is fun.

Norm
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Old 12-10-2007, 10:02 PM
  #769  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Tim,
Can't help noticing your gear door, did you cut the door and install a sequencer to close the door when extended?
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Old 12-11-2007, 12:16 AM
  #770  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

thats the plan ems jomar sequencer i still am tweaking the doors for a nice fit/ takes time. well ive got the doors done! heres the proof. tomorrow ill reattach the nose wheel steering and work on the sequencers for the gear doors. the doors do not open as much as the full scale but im happy with them and they close so nice and perfect. The more i fiddle the more apt to mess it up!
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Old 12-11-2007, 01:31 AM
  #771  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

electrics dont vibrate like glow so im not too worried. those doors are on to stay . ill pop a ball link if anything. ill drop the doors at slow speeds. 16 lbs need outer wings and lipos. she will be close to 20 lbs. my electric 310 is 22.6 lbs and she flys great so weight isnt a big deal
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Old 12-11-2007, 06:03 PM
  #772  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Has anyone out there tried running an OS 70 ultimate with flexible pipes instead of the mufflers supplied, if so does this have any detriment to power?
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Old 12-11-2007, 06:15 PM
  #773  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

Nice job on the gear door Tim, but hurry to cover those electric motors! (you know my opin on those...)
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Old 12-11-2007, 06:35 PM
  #774  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

oh dont worry i need a ball driver to remove the cowls and will get the radials on. Heres my new problem. I can fit 7s each side in my batt compartment. I really would like to make a short charge plug where i could recharge the batts without having to remove them. i can do this by making a short pigtail and y off that so i can charge the packs individually.
taking those batts out all the time will break details so i know saftey gurus will cringe but ive been using big lipos for a while and can correctly charge them.
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Old 12-11-2007, 07:25 PM
  #775  
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Default RE: Top Flite B-25 ARF (Tecnical, tips, suggestions)

You gotta be careful charging lipos in or out of your plane. So tell the gurus that you may set a fire in or out the plane if one dont know what he's doing. The fire will still be set in the house!!! So if i were you i would install the pigtail and monitor the charge...
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