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40% 260 on a Diet

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Old 01-09-2007, 09:52 PM
  #126
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Default RE: 40% 260 on a Diet

Is that bondo you used around the vertical fin fairing ?

Albert
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Old 01-09-2007, 10:15 PM
  #127
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Default RE: 40% 260 on a Diet

Quote:
ORIGINAL: as722

Is that bondo you used around the vertical fin fairing ?

Albert

No Albert its not bondo, its like mud that you put on drywall, except it the lite stuff. Home Depot sells it..... I'll look up the name later and let you know.....



(Lite Spackle found at Home Depot)
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Old 01-10-2007, 05:21 PM
  #128
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Default RE: 40% 260 on a Diet

This is an awsome build....keep us posted!
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Old 01-12-2007, 08:20 AM
  #129
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Default RE: 40% 260 on a Diet

Hey George, do you have any more pictures of what you guys did to lighten up the wings and stabs? What did you use to pattern out the drill holes on the stabs?

Roger
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Old 01-13-2007, 02:22 AM
  #130
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Default RE: 40% 260 on a Diet

Roger,

The wings have not been done as of yet. The stabs pattern were drawn (laid up) on the foam and then cut (drilled) out. There was no pre defined pattern...

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Old 01-13-2007, 02:24 AM
  #131
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Default RE: 40% 260 on a Diet

8 lbs 7 oz as she sits in this photo....


Cowl
Canopy
Landing Gear (Main and Tail)
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Old 01-14-2007, 01:55 AM
  #132
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Default RE: 40% 260 on a Diet

DA 100 installation tonight.......... Notice the weight of the bolts and the 2.5 deg right thrust in the mount...

Needless to say the aluminum bolts were used to mount the engine....

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Old 01-14-2007, 12:22 PM
  #133
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Default RE: 40% 260 on a Diet

This is a learning experience for me, great work, keep us informed.
My Carden 260 is at 39.3 lbs and it flyes like a dream with a DA 150.

Happy flying
George
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Old 01-14-2007, 02:43 PM
  #134
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Default RE: 40% 260 on a Diet

260 man,

If it doesn't balance and or doesn't have enough power with the 100 will it be strong enough for a 150 ?

Thanks
Albert
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Old 01-14-2007, 03:30 PM
  #135
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Default RE: 40% 260 on a Diet

260 Man,
Could you tell me where to pick up the aluminum mounting bolts.
Thanks

PS really enjoying the build thread.
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Old 01-14-2007, 07:22 PM
  #136
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Default RE: 40% 260 on a Diet


Quote:
ORIGINAL: as722

260 man,

If it doesn't balance and or doesn't have enough power with the 100 will it be strong enough for a 150 ?

Thanks
Albert
Yep, but it will fly just fine on the 100..............
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Old 01-14-2007, 07:30 PM
  #137
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Quote:
ORIGINAL: sailing1

260 Man,
Could you tell me where to pick up the aluminum mounting bolts.
Thanks

PS really enjoying the build thread.

Aluminum Fasteners supply Inc

239-643-4551

PN 1448HHB205 (2024-T4)
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Old 01-14-2007, 07:32 PM
  #138
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Default RE: 40% 260 on a Diet

On its wheels with motor in and spinner, prop, ignition, throttle servo all installed it sits at 16 lbs 6.4 oz..........Kavan Tires, Titanium Axles

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Old 01-14-2007, 08:03 PM
  #139
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Default RE: 40% 260 on a Diet

Hello Albert

The C/G as it sits now with power plant, prop and spinner installed is @ 2.5" behind former 2, this means I will probably be placing some of the radio gear behind the C/G to get it balanced.
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Old 01-14-2007, 09:27 PM
  #140
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Default RE: 40% 260 on a Diet


Quote:
ORIGINAL: 260 Man

Roger,

The wings have not been done as of yet. The stabs pattern were drawn (laid up) on the foam and then cut (drilled) out. There was no pre defined pattern...


Thanks George, looking forward to seeing what you guys do with the wings.

Stay warm!
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Old 01-14-2007, 11:12 PM
  #141
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Default RE: 40% 260 on a Diet

I guess what we did not consider is that fat that you would have to mount the 100 urther forward because of a shorer crank.. therefore, more engine weight further forward to help compensate for the small engine.

Good for you guys...

Talk to you later!!


Chuck
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Old 01-15-2007, 05:22 AM
  #142
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Default RE: 40% 260 on a Diet

George - do you worry about the aluminum mount bolts galling in the steel nuts? I've been thinking of using titanium bolts for this application basically to eliminate the possibility of them galling (and then not being removable!). Obviously, if I could use aluminum, I would from both a cost and weight standpoint. Thoughts?

Thanks!
Ken
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Old 01-15-2007, 01:50 PM
  #143
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Default RE: 40% 260 on a Diet

Aluminum to aluminum usually locks up unless you use anti seize lubricant generally used in full scale applications. Aluminum to steel with silicone won't pose as a problem.

Bob Sawyer
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Old 01-15-2007, 04:47 PM
  #144
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Default RE: 40% 260 on a Diet

2.5" behind F-2 is 1/4" in front of the leading edge of the wing. I'm assuming you meant F-3, if so 2.5" behind F-3 would be 1 7/8" in front of the recomended CG which is way nose heavy. If you are balancing 2.5 behind F-2 you'll probably be placing all of the radio gear and the kitchen sink behind of the recomended CG.

Albert
Quote:
ORIGINAL: sensei

Hello Albert

The C/G as it sits now with power plant, prop and spinner installed is @ 2.5" behind former 2, this means I will probably be placing some of the radio gear behind the C/G to get it balanced.
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Old 01-15-2007, 10:37 PM
  #145
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Default RE: 40% 260 on a Diet

No, like I said, 2.5" behind F2 where the cowling meets the fuse, also with the 4 servos in the tail and the horizontal stab in place, along with batteries behind the canopy this will be a stroll in the park.

Bob Sawyer
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Old 01-15-2007, 11:12 PM
  #146
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Default RE: 40% 260 on a Diet

this is awsome, i havent been on RCU in a while and this is the kind of stuff that gets my blood running all over again. awsome job man!
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Old 01-16-2007, 04:06 PM
  #147
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Default RE: 40% 260 on a Diet

Yeah, ok !
Quote:
ORIGINAL: sensei

No, like I said, 2.5" behind F2 where the cowling meets the fuse, also with the 4 servos in the tail and the horizontal stab in place, along with batteries behind the canopy this will be a stroll in the park.

Bob Sawyer
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Old 01-16-2007, 10:24 PM
  #148
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Default RE: 40% 260 on a Diet

Albert,

The recommended C/G is 11.3" behind F2 and this thing balances at 2.5" behind F2 equaling 8.8" in front of the C/G as it sits Ok, there is 1 LB 12 ozs. in tail feathers, servos and hardware at 60" behind the C/G; moving the C/G aft about 8.00" Because of the project target weight and power plant choice, the aft portion of the fuse had to be fabricated very light or the recommended C/G would have been unattainable without led in the nose; killing the target weight in the first place. Remember that 60" arm is very sensitive to the C/G.

Bob
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Old 01-17-2007, 10:52 AM
  #149
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Default RE: 40% 260 on a Diet

Just a prediction here, i bet we will find out as progress is made, i just dont understand why people cant help to keep the b.s. comments to themselves about ow it wont work or it gonna blow u or whatever. Let the man build, let the man fly, if it fails, you will have your turn to say i told you so...

BUT... if it flys great, makes weight, balances where it should, i bet no one has the balls to admit they were wrong.

Bob, wish it wasnt so cold, i know the garage has got to be freezing right now, not good to build in



To sunny skies and warmer weather, i anticipate the rest of your build.


Chuckles
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Old 01-17-2007, 03:36 PM
  #150
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Default RE: 40% 260 on a Diet

So are you saying that you put the whole airplane together, wings, stabs etc. and it balances at 2.5" behind F-2 or are you saying that your fuse balances at 2.5" behind F-2 ?

Albert
Quote:
ORIGINAL: sensei

Albert,

The recommended C/G is 11.3" behind F2 and this thing balances at 2.5" behind F2 equaling 8.8" in front of the C/G as it sits Ok, there is 1 LB 12 ozs. in tail feathers, servos and hardware at 60" behind the C/G; moving the C/G aft about 8.00" Because of the project target weight and power plant choice, the aft portion of the fuse had to be fabricated very light or the recommended C/G would have been unattainable without led in the nose; killing the target weight in the first place. Remember that 60" arm is very sensitive to the C/G.

Bob
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