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my first arf build (H9 sundowner 50)

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my first arf build (H9 sundowner 50)

Old 04-06-2010, 01:31 PM
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DIABLOTAC78
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Default my first arf build (H9 sundowner 50)

im gonna use the saito fg 14/82 on this baby

i made a hole for the carburator and used the engine mount that came with the plane



any comments are welcome
thanks in advance
Old 04-06-2010, 03:02 PM
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Default RE: my first arf build (H9 sundowner 50)

pics with the cowl on , for engine hole on the cowl i used the lexan reamer, scissor, and sandpaper . i have a dremel but i prefer it the hard way


i think i did a good job for first timer

thanks for the helpfull threads in this forum , i learn a lot from rcu.
Old 04-06-2010, 03:06 PM
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Default RE: my first arf build (H9 sundowner 50)

i noticed the fire wall was not glued well so i reinforced it with epoxy and fiber sheet.
Old 04-06-2010, 03:20 PM
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Default RE: my first arf build (H9 sundowner 50)

I second the reinforcing with epoxy and fiberglass cloth. Thats what I did with mine, plus mine has 3/32 Aircraft Birch doubler over the stock firewall. I do not like the soft plywood that is used with ARF's nowadays. Here is my reinforcement work. The outside of the engine box has been fiberlassed on the corners, and triangle stock added to the inside. Also, some cooling slits would look real cool, and help cool that Gas Burner. I tend to have planes that last for many flying seasons. Knock on Wood I swapped out teh Aluminum Wing tube for a Carbon wing tube so I had several ounces to play with reinforcements for longivity.
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Old 04-06-2010, 03:29 PM
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Default RE: my first arf build (H9 sundowner 50)

motorman you did a nice job on reinforcing very clean finish. what size of fiber cloth you used?
Old 04-06-2010, 03:36 PM
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Default RE: my first arf build (H9 sundowner 50)


ORIGINAL: DIABLOTAC78

motorman you did a nice job on reinforcing very clean finish. what size of fiber cloth you used?
I am guessing, but I think it is 3 OZ cloth. I have a couple yards of it. I use 30 min Epoxy Resin. I have never had a firewall loosen or become fuel soaked.
Old 04-06-2010, 03:47 PM
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Default RE: my first arf build (H9 sundowner 50)

did you also put epoxy in the inside of the fire wall? if yes how did you manage to put it? I found it very hard to do specially the top inside of the firewall.
Old 04-06-2010, 03:51 PM
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Default RE: my first arf build (H9 sundowner 50)

nevermind i noticed that i can do it from the hole infront of the firewall. newbie dumb question
Old 07-04-2010, 03:18 PM
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Default RE: my first arf build (H9 sundowner 50)


DIABLO....i love the way saito valves go out from the cowl!!good work[sm=thumbup.gif]
Old 07-04-2010, 03:54 PM
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Default RE: my first arf build (H9 sundowner 50)


ORIGINAL: DelGatoGrande


DIABLO....i love the way saito valves go out from the cowl!!good work[sm=thumbup.gif]

thanks man[8D] . but still i haven't finish the plane yet . i have to check a lot of things like the down thrust , and its a bit nose heavy. maybe some day ill go down to your place for your help
Old 07-04-2010, 06:04 PM
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Default RE: my first arf build (H9 sundowner 50)


...whenever you like my friend you are wellcome [8D]


..just had a closer look at the firewall[:-]

and thought you could drill and place some toothpicks to "interlock" the firewall with the side woods frames better

..i cant tell the thickness of the firewall..if its thick inought you could change from toothpicks to souvlaki picks(bigger)...after you eat them offcorce




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Old 07-05-2010, 05:43 AM
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Default RE: my first arf build (H9 sundowner 50)

thats a great idea it will add strength to the firewall.

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