Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Cheap eBay "Screamer" build.

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Old 09-25-2009, 08:00 PM
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Default Cheap eBay "Screamer" build.

Hey. I just purchased "Screamer" 40 size plane off of the 'Bay. Looks kind of like the Polecat, but with a Sundowner covering scheme. Will be powering it with a modified Jett .46 and making whatever mods necessary to get this cheap ARF up to snuff. Will follow with a build as soon as I receive it.
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Old 09-25-2009, 08:33 PM
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I have a nitro models polecat with a sj46.Its not super fast.but its a scale air racer and looks very cool.you will like the combo.you will need a muffler spacer to clear the fuse.or just mount it stright up...
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Old 09-25-2009, 08:58 PM
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Hack the planet!
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Old 09-25-2009, 09:01 PM
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But yeah I may try one of those aluminum deflectors. How deep does the muffler go into the cowl stock?
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Old 09-25-2009, 09:12 PM
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What's been done to the .46?
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Old 09-25-2009, 09:49 PM
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the muffler will not fit.it bumps into the fuse.and you cannot cut it.just mount it stright up.also i bet its the same landing gear witch is very weak.pancake first landing.just bend it back till you get a new one.or renforce.long takeoff run.lots of right rudder.but it flies great.you will be happy
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Old 09-25-2009, 09:51 PM
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lol!! your the only person who knows what movie zero-cool is from
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Old 09-25-2009, 10:06 PM
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Oh come on! Hackers all the way, lol. It is an older Jett which a buddy of mine modified with an O.S. 1.08 carb. It screams. I had it on my clipped wing Predator before I switched to a Nelson. This will be a bargain build and will see what happens. I would like to avoid mounting it upright and having the head stick out of the top, but I have to get the plane and see first.
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Old 09-25-2009, 10:10 PM
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Here is a shot of it from the 'Bay.
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Old 09-25-2009, 11:34 PM
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looks way better then my polecat.like the wing tips.
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Old 09-27-2009, 11:37 PM
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It does look neat, and hopefully I will have it this week. I am also considering going electric, as I have a nice 6S setup I could use in it. This would also save me from hacking up the cowl. I will have to see how light/heavy it is.
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Old 09-28-2009, 08:32 PM
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yup, I have one of those. It flies pretty well, no where neer as fast as a q500 on a sport motor. Very fun fast sport plane though.
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Old 09-28-2009, 10:01 PM
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Jeff, what was your all up weight? What motor and servos do you run? Any pre-assembly advice? Thanks.
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Old 09-29-2009, 12:01 PM
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I never weighed the plane and I'm just using basic futaba standard bearing servos. I'm just running a sport motor though, you might want better servos for a high performance engine.
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Old 09-30-2009, 12:27 PM
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Got the Screamer today. Upon initial inspection things look good. Everything was carefully packed and very light. Tried dry fitting a few things together and so far so good. I will probably go with HS-225's all around to save some weight. I have yet to decide if I want to go glow or electric, since I can borrow an electric system out of my Neocat that will make this thing haul. Battery placement may be an issue, depending on how it balances. Note that even though the auction stated that no manual was included, mine came with one.
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Old 09-30-2009, 01:19 PM
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I mocked up the plane and I can honestly say that I am impressed. The landing gear is beefy 1/8th inch thick aluminum and the main spar is already laminated from two pieces of plywood. The elevator joiner wire is thick and strong. The fit of the wing halves with the joiner is better than my 25% Great Planes Su-31, surprisingly. The static alignment of the wing and tails just stuck in their slots was better too. Nice thin airfoil. I needed to do some minor trimming to get the gear halves into the fuse, but nothing major. Although I thought it would be asking too much, the blind nuts for the gear lined up, too. Cowl fits great. The color match of the yellow is decent. The canopy/upper deck is one large piece of painted lexan, which needs to be trimmed to fit. I did a rough trim for this picture but will wait on that until I get a motor mounted to go further. Airframe weight as you see it is 2 pounds 2 ounces! So far an awesome deal for about $100 shipped.
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Old 09-30-2009, 02:37 PM
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So far I have hinged the ailerons and joined the wing halves. Smooth going. The plane appears to come with an assortment of different shaped CA hinges, but they all look good and I saw no reason not to use them. I have had cheap ARF's where the CA hinge slots were cut way off center. The Screamer does not have this issue. The wing halves were joined with epoxy, and fit very well. The wing has a teeny teeny bit of dihedral. There is a plywood doubler for the wing bolts. The manual shows it in the parts layout, but does not mention it or show its installation. However, anyone who has built a kit or ARF should recognize it and know what to do with it. Also here is a shot of the fuselage. It is extremely light and the motor box is very sturdy. I will go over it with some epoxy anyway just to be safe.
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Old 09-30-2009, 02:39 PM
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Another thing to note. The manual seems to show trimming the canopy/deck so that it ends before the back of the cowl begins. I think it is much easier to leave the front of the deck long and have it slip under the cowl. This way you eliminate some screws and have a smoother looking nose.
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Old 09-30-2009, 03:25 PM
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Next comes the tails. I stripped the covering from the middle of the stab (it really helps to warm it with an iron before trying to peel it) and mixed some glue. I slid the glued up stab into the fuse (while NOT forgetting the elevator joiner) and took my measurements. Some blue painters tape held the stab true until the glue dried. Note that the instructions tell you also NOT to forget the joiner, but they also show the stab in upside down!? The yellow with blue stripes is the underside. The vertical stab drops in now. Once again, everything is fitting well. The tail is also very beefy with plenty of wood to wood contact. The vertical tail contacts the horizontal tail inside the fuse for even more strength.
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Old 09-30-2009, 03:39 PM
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I have run into the first thing on this plane that I would consider slightly annoying. The elevator halves do not come notched or drilled for the elevator joiner wire. This is not a big deal, and can be done in minutes, but is still a bit of a pain. Before I install the rudder I need to to figure out if I want to run the tail wheel assembly they give you, or just a skid. I think I will just do the skid as the entire tailwheel assembly weighs .6 of an ounce. Granted that isn't much, but hey, why not? If you nix the tailwheel, you will need to add another hinge at the bottom of the rudder.
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Old 09-30-2009, 04:12 PM
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And just like that, they are done. I also opted for the tail skid instead of the tail wheel. Less weight, drag, etc. I will see how the ground handling is later. Plane is looking good!
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Old 09-30-2009, 07:15 PM
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That should be a great all around plane!

The one detail that makes me cringe is the plywood tongue that holds the front of the wing on. I would add a couple of screws to hold the front.
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Old 09-30-2009, 07:55 PM
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I mounted the ailerons servos at this point. They are mounted on plywood plates with hard balsa blocks. I used Hitec HS-225BB's here to try and save some weight. The control horns the kit came with are fine, but I replaced them with DuBro stuff that is easier to work with.
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Old 09-30-2009, 08:04 PM
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Combat: Yeah I did think that tongue looked very strange. It seems strong, but will most certainly get reinforced if needed.
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Old 09-30-2009, 09:09 PM
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I read a review somewhere [but don't remember where] that this type of tongue works just fine up until it fails .
It would take some work to retrofit with screws. When you compare the amount of work that went into the rest of the plane, it's a small detail though.
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