stunthanger.com
Building Tips and technical articles. => ARF'S => Topic started by: roger on December 06, 2006, 10:57:51 AM
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;any body have any pic. of there finished brodak p-40 ill like to compare
roger ~^ ~^ #^
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I have no photos of the ARF but here is the first ARC.
Bob Z.
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somethin' kinda funky is going on at the nose. Why the step at about the front of the engine lug? Looks like the nose was extended?
--Ray
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that step is part of the prototype. it was an air inlet on the real aircraft.
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Mark is CORRECT!!!!
Bob Z.
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wohoooooo I winned I winned,
hehe, ok ok I know thats kinda silly but Hey I couldnt resist, breathed to many fumes at work today or something j1
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Don't know who's this is, I got it off the web somewhere.
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Are the split flaps stock per the kit as designed, or does it come with full flaps?
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I don't know about the kit but the ARF/ARC prototypes came with split flaps.
Check with Brodak.
Bob Z.
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the ARC and I would assume the ARF as well come with split flaps
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wow
roger
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???what dose arc mean? im kinda new.
bill.
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Almost Ready to Cover
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I have no photos of the ARF but here is the first ARC.
Bob Z.
Bob,
What kind of motor mount do you have there???
Looks like you could change out the motor with out a major problem.
Do you have more photos of how it works?
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Hi, Paul - as far as I know, that's the system that comes with the plane. On the prototype, the clamping plates were very thin so I machined new ones from 3/16" 6061 T-6 aluminum.
The advantage is that you can remove/change engines quickly without having to re-drill the mounts.
Many people do not care for this system, preferring the traditional through-bolt method. I use it on the prototype ARC/ARF planes that I develop simply because I like to try a variety of engines.
The P-40 has flown with three different engines while the profile Cardinal has flown with over 12.
The clamp mounts seem to work well but, on the Cardinal, I replaced the bolts.
Bob Z.
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The Brodak mounts I use have an aluminum plate for the engine lugs to rest on. I hadn't thought about just using the maple mount for the lugs to rest on. Also, did you use blind nuts or the threaded inserts? Thanx. Glen
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Hi Bob,
1st, thanks for a great ARF. You and John are doing an outstanding job, and making it very easy for us "Retreads" to come back to our roots. :-)
RE: the MM, My P-40 ARF came with an extra (updated?) HD plate to replace the thin one that came in the parts package. I liked this setup, and it is an excellent solution for an ARF that can use many different size engines.
In my case I did not need to use this because mine is an Electric powered plane. The plane flys great and is everything I could ask for.
Thanks again for your work on this ARF, and for all your informative posts that help us enjoy CL again. :-)
Hi, Paul - as far as I know, that's the system that comes with the plane. On the prototype, the clamping plates were very thin so I machined new ones from 3/16" 6061 T-6 aluminum.
The advantage is that you can remove/change engines quickly without having to re-drill the mounts.
Many people do not care for this system, preferring the traditional through-bolt method. I use it on the prototype ARC/ARF planes that I develop simply because I like to try a variety of engines.
The P-40 has flown with three different engines while the profile Cardinal has flown with over 12.
The clamp mounts seem to work well but, on the Cardinal, I replaced the bolts.
Bob Z.
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On my p-40 I used the thinner of the two sets of plates, I think its 1/8. I used it for a bearer under the engine to distribute the load. I basically only use one flavor of engine so interchangability is not an issue with me. I attached the plates with the supplied inserts and shorter 4-40 screws. I then drilled through the aluminum and hardwood mounts for the actuall attacment bolts for the motor. I cut a section out of the cheek cowl and inset new blind nuts then carefully reattached the cheek cowl. I feel more secure about it though I have heard from some that the mount system as supplied is quite a good innovation and was spoken highly off. This was just my preference, your mileage may vary.
Just for the record, This plane appears to be just what I was expecting and hoping for. It saved me some precious time by having the framing done and allows me more time to finish. This plane is intended for a practice and backup plane.
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Hi, Mark - glad to see your innovative approach - spreading the load is important as sometimes the hardness of the wood varies.
The important thing is that no matter how the model is originally configured, if a person likes it customized to individual preferences, GO FOR IT!!!!
I have seen many ARFs and ARCs with personal touches that the owners can be truly proud of.
Bob Z.
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(http://i82.photobucket.com/albums/j262/kickercoach12/Picture184.jpg) all stock controls , love this plane !I have 3 of them this one is in Texas , my other one has Brodak .40 with repitched Master airscrew 3 blade 10x4.5 . I am building another for the Axi Electric set up, they fly very , very well.
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anybody else have this plane lets see it....
roger.
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Hi, Rudy and thanks for the compliment.
We are doing everything we can to bring people into control line, whether they are newcomers or returnees. The ARF/ARC offerings seem to be accomplishing the plan quite well.
We try and iron out all the bugs from each and every ARC/ARF before offering it for sale.
Some planes need a lot, others require minimal changes. The one area that most often needs attention is the control system and its attachment to the airframe.
Since the manufacturer is accustomed to building R/C planes, the U/C system is completely new.
In the initial stages of working with the manufacturer, I came up with a simple set of engineering drawings that specify a bellcrank suspended between two plywood plates that are attached to the main spars.
I also added two vertical plates that couple the upper and lower plates, acting as shear webs. Properly implemented, the system is very robust.
As usual, feedback, whether positive or negative, is always welcome as we are continually trying to improve the product lines.
Bob Z.