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Building Tips and technical articles. => ARF'S => Topic started by: peabody on February 01, 2018, 09:32:32 AM
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Hi
The primary issues I'm having with the Vector ARF appear to be that no one actually assembled one prior to kit shipment.
1) The engine compartment will NOT fil a LA 40/46 OS FP 40 without significant modification to the firewall/F!
2) The recommended fuel tank (a Nobler tank from Brodak) must be mounted about a 1/2 inch behind F1 or else the tabs for the cowl will interfere and not work
3) The spinner size has been reduced to 1 3/4", which leaves very little "meat" when a muffler cut out and needle access are made...
These issues may seem trivial to some, but mean that the airplane is NOT truly an ARF....too many modifications...
I also have an ARC Vector....I will use a 5 ounce "narrow" (1 3/4") tank and external venting.
Other than that, assembly seems straight forward...
Have fun!
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Are you saying the LA40 won't fit because the backplate screws hit the firewall? It seems to fit for me with a little gap for a spinner.
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Hi Chris
I suspect different backplates or screws....bottom line: it shouldn't be that close.
Have you a spinner in mind that won't reveal a large gap?
I'm planning on Randy's
Just a little more thought and this ARF could set a new bar....as it is, the quirks need to be worked around.
Have fun!
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Hi Chris
I suspect different backplates or screws....bottom line: it shouldn't be that close.
Have you a spinner in mind that won't reveal a large gap?
I'm planning on Randy's
Just a little more thought and this ARF could set a new bar....as it is, the quirks need to be worked around.
Have fun!
Does your backplate have the molded remote needle valve attachment? I took that off and will end up using a aluminum backplate. I have a regular backplate from one I replaced to aluminum on it now with the stock screws. I don't have a spinner only a 2in, I ordered a 1 3/4 great planes. My dad asked me to build it for him and if I leave it up to him he won't put a spinner on it.
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I don't see anything in the instructions about a exit hole for cooling on the cowl. What are your plans for that?
My spinner gap will be 3/32
Chris
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With so much of the engine hanging out, I am going to leave to film over the hole....
I can always open it.
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Got this thing coming along.
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;D
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It looks as if mine will be 44 ounces with 3/4 oz. of tip weight....
I forget what the others that I have built (2) or assembled (2) weighed.
I did substitute the supplied gear for some that I had laying about
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It looks as if mine will be 44 ounces with 3/4 oz. of tip weight....
I forget what the others that I have built (2) or assembled (2) weighed.
I did substitute the supplied gear for some that I had laying about
This one is going to be what looks like 47 or 48 :o
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I epoxied everything. And added a block of wood between the engine bearers. I'm using the stock muffler too, how about you? How did you glue yours to get a nice weight?
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Epoxy.
No wheel pants (fly in grass)
Nifty Muffler
I hope to fly it this weekend
Have fun!
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Epoxy.
No wheel pants (fly in grass)
Nifty Muffler
I hope to fly it this weekend
Have fun!
What is a nifty muffler?
This Vector is petty nose heavy, was yours?
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The muffler is, I believe, a Scott Dinger piece....seems as light as a chip....
Mine seems to balance about 1/2" ahead of the spar....If the wind quits, it's ready to fly and I'll know more...
Have fun!
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I am going to have John inspect the issues looking at my ARC tomorrow ....then we are going to test fly the Vector ARF if the winds are friendly.
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Went out with John and test flew it today....
44 ounces with 3/4 ounce tip weight /LA 46
Flew great! Probably better than any plane I have had on an initial flight!
Issue was that the slider on the adjustable lead outs is a 2.5 mm METRIC screw....sucks...
Issue is that the Great Planes spinner wasn't quite trimmed enough and had a little wobble
Issue was that the tip weight came out....I found the cover....not the lead.
I will check tightness on screws and replace the tip weight....otherwise I'm happy as if I had sense....
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Issues with my scale....now showing lighter!
Will weigh it again soon....Added 1/4 ounce of tail weight and another 1/4 ounce of tip weight....flies GREAT.
Weighed it again....46 ounces, ready to add fuel
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You called it right about the spinner! See, you know me well. Dad
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For giggles, I weighed my well worn first version ARF/LA 46......lots of glass attempting to repair gear issues
48 ounces
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" ) The spinner size has been reduced to 1 3/4", which leaves very little "meat" when a muffler cut out and needle access are made...
These issues may seem trivial to some, but mean that the airplane is NOT truly an ARF....too many modifications.. "
Not so , I designed the VECTOR for a 1 3/4 inch spinner, It has always been 1 3/4 inch and the KIT takes a 1 3/4 inch spinner
Did you get an old one that was built different with a 2 in spinner?
Randy
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Randy
The early Vectors were for a 2" spinner (almost....metric)
Much easier for a neophyte and allows for more prop and spinner choice.
The shame is that no one actually test built one before ordering the Chinesement to build them
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Randy
The early Vectors were for a 2" spinner (almost....metric)
Much easier for a neophyte and allows for more prop and spinner choice.
The shame is that no one actually test built one before ordering the Chinesement to build them
The early ones were a metric size that was just under 2 in, and the early one were a mistake, they were designed to be 1 3.4
Some one took it upon themselves to change
1 3/4 is NOT a problem with the Vector as the 100s or 1000s of VECTOR KITs that have been built and used the 1 3/4 in spinner, and I was under the impression from talking to John and Dennis that Dennis did build an Electric Vector ARF
Sorry but I do not see this as the big problem that you seem to
Regards
Randy
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Do these have the soft, crappy engine bearers????
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Hi David...
It's not oak or maple....
I used threaded inserts....it is an almost perfect application or the
Have fun!
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Lets get recommendations for optimum engine for the new arf.
Anybody think an Evo .36 will work?
Brodak 40?
LA 46?
Others??
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The B-40 will certainly work.
The LA 46 seems VERY capable.
I will use an LA 46 in my ARC as well, and am scratch building one that will use an Aero Tiger 36
Whichever power, it should be light.
Have fun!