David Davis Posted January 4, 2022 Author Share Posted January 4, 2022 I am a four-stroke man myself, infact the only model I have which is powered by a two-stroke is the Boomerang and the reason I have fitted a two stroke to the model is that it will be flown by beginners and I don't want to risk one of my beloved fourstokes in the clumsy paws of novices. I don't even fly the Boomerang with my Enya 50 two-stroke any more for the same reason though what I am going to use that engine for I've no idea! At some stage in the instructing process you have to allow beginners to recover from their mistakes and if you're too slow to regain control this is what happens! As for the long take off run, perhaps I do not have the engine peaked out or perhaps the stance on the tricycle undercarriage is too nose down. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted January 4, 2022 Share Posted January 4, 2022 (edited) 3 hours ago, David Davis said: As for the long take off run, perhaps I do not have the engine peaked out or perhaps the stance on the tricycle undercarriage is too nose down. The single leg undercarriage provided are not great at remaining stiff, and can go back as the take off run is made, and just adds resistance to the run. A triangle main u/C is easily added to the model. Overpropping the motor may quieten the motor for the field, but can hold it back from full power. You can lift the nose wheel distance to the ground by adding a couple of wheel collets above and below the steering bearing, and giving a level of slight nose up to the ground run. Great model. Edited January 4, 2022 by Denis Watkins Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 4, 2022 Share Posted January 4, 2022 7 minutes ago, Denis Watkins said: The single leg undercarriage provided are not great at remaining stiff, and can go back as the take off run is made, and just adds resistance to the run. A triangle main u/C is easily added to the model. Overpropping the motor may quieten the motor for the field, but can hold it back from full power. You can lift the nose wheel distance to the ground by adding a couple of wheel collets above and below the steering bearing, and giving a level of slight nose up to the ground run. Great model. Denis, we're you able to buy the triangle wire undercarriage and if so where can it be got? Or did you modify it yourself? Also with the new dubro low bounce wheels I have bought they won't fit onto the stock wire axle. Did you have to use a small drill bit to enlarge the holes? Thanks. Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 4, 2022 Share Posted January 4, 2022 (edited) I've just googled there Denis, where JP does a 40 size triangle wire unccarriage and Radio Active also makes one though there's is billed as large. Is yours the JP one? Did you have to drill out the dubro wheels? Also did you have to add wooden plywood blocks on the floor of the fuselage to be able to install the wire undercarriage? Edited January 4, 2022 by aidan mcatamney Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 4, 2022 Share Posted January 4, 2022 10 hours ago, aidan mcatamney said: Martin thanks for the photos. We do have one thing in common, I'm a Saito fanatic also. I love the sound and the reliability of them. I always tell people the only time a Saito engine quits is when it's out of fuel. Did you just use the stock landing gear wire for the Boomerang? Is it strong enough? Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted January 4, 2022 Share Posted January 4, 2022 Do avoid drilling out Dubro wheels Aidan, as the plastic is already incredibly smooth inside the axle hole. Add on wire u/C often come as large and small and no other details. Large is what you want for a Boomerang. Some fit the Dubro wheel, and some dont. If they dont, get your fine file out, and some wet and dry for polishing. In the vice, wipe evenly around the axle with the file to take down the axle a smidgen. Smooth these out and polish to fit the Dubro wheels to spin freely. This is so worth it, as you will fit and forget the u/C for sometime. Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 4, 2022 Share Posted January 4, 2022 2 minutes ago, Denis Watkins said: Do avoid drilling out Dubro wheels Aidan, as the plastic is already incredibly smooth inside the axle hole. Add on wire u/C often come as large and small and no other details. Large is what you want for a Boomerang. Some fit the Dubro wheel, and some dont. If they dont, get your fine file out, and some wet and dry for polishing. In the vice, wipe evenly around the axle with the file to take down the axle a smidgen. Smooth these out and polish to fit the Dubro wheels to spin freely. This is so worth it, as you will fit and forget the u/C for sometime. Thats great advice Denis, many thanks. I never thought about filing down the axle slightly. That's what I will do. Should I go for the Radio Active wire undercarriage, its large? The JP undercarriage is advertised as 40 size. Not sure which of the two to buy. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted January 4, 2022 Share Posted January 4, 2022 The wide track of the Radio Active Large is ideal MAIN UNDERCARRIAGES - (ZINC PLATED)AA1093 small l0 SWG. approx.dimensions 15" wide x 3" high (375mm. x 75 mm).AA1094 large 8 SWG. approx.dimensions 18" wide x 3 1/2" high (450mm. x 87mm). Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 4, 2022 Share Posted January 4, 2022 5 minutes ago, Denis Watkins said: The wide track of the Radio Active Large is ideal MAIN UNDERCARRIAGES - (ZINC PLATED)AA1093 small l0 SWG. approx.dimensions 15" wide x 3" high (375mm. x 75 mm).AA1094 large 8 SWG. approx.dimensions 18" wide x 3 1/2" high (450mm. x 87mm). Are they just bolted onto the bottom of the fuse Dennis using straps? Or will I have to cut a groove out? Quote Link to comment Share on other sites More sharing options...
Jonathan M Posted January 4, 2022 Share Posted January 4, 2022 Aidan, just buy a set of four saddle-clamps for 8SWG wire, and screw into the existing ply U/C base. 1 Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 4, 2022 Share Posted January 4, 2022 3 hours ago, Jonathan M said: Aidan, just buy a set of four saddle-clamps for 8SWG wire, and screw into the existing ply U/C base. Thanks Jonathan. I've decided to keep the 46fx for another plane and have bolted on the Saito 62. I'm just mad about fourstroke sound. Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 13, 2022 Share Posted January 13, 2022 Hi there, I've the Boomerang almost completed, but have stumbled upon a problem. Referring to the mounting of the wing, I thought they would have included in the kit a small piece of plywood to support the two wing bolts that hold the wing down. I found these two small black things in the bag, am I right in saying that they are used for threading the wing bolts through as in this photo, or am I wrong? Quote Link to comment Share on other sites More sharing options...
Don Fry Posted January 13, 2022 Share Posted January 13, 2022 (edited) Yes, they stop the bolts crushing the wing. Edited January 13, 2022 by Don Fry Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 13, 2022 Share Posted January 13, 2022 12 minutes ago, Don Fry said: Yes, they stop the bolts crushing the wing. Thanks Don Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 13, 2022 Share Posted January 13, 2022 On 28/12/2021 at 21:02, Denis Watkins said: We can do the " B " Cert Schedule with an SC46 on a Boomerang. I was thinking of fitting a receiver switch with a charging jack this time round Denis, so I wouldn't have to take off the wing or unscrew the hatch to check the battery. Did you just use an ordinary switch? Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 13, 2022 Share Posted January 13, 2022 On 04/01/2022 at 09:40, Jonathan M said: Aidan, just buy a set of four saddle-clamps for 8SWG wire, and screw into the existing ply U/C base. Jonathan, I was going to use a receiver switch with a charging jack to save me any bother taking off the wing or the hatch to check the battery. What did you use? Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted January 13, 2022 Share Posted January 13, 2022 2 hours ago, aidan mcatamney said: I was thinking of fitting a receiver switch with a charging jack this time round Denis, so I wouldn't have to take off the wing or unscrew the hatch to check the battery. Did you just use an ordinary switch? RapicRC online 1 Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 13, 2022 Share Posted January 13, 2022 56 minutes ago, Denis Watkins said: RapicRC online Thats exactly what I'm going to use Denis. Very handy. Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 17, 2022 Share Posted January 17, 2022 My new Boomerang ready for its maiden flight. 3 Quote Link to comment Share on other sites More sharing options...
Martin Arnold 1 Posted January 17, 2022 Share Posted January 17, 2022 Looks good Aidan, glad to see you went with the saito62, what prop do you have on it ? Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 17, 2022 Share Posted January 17, 2022 1 hour ago, Martin Arnold 1 said: Looks good Aidan, glad to see you went with the saito62, what prop do you have on it ? Thanks Martin. I normally go with an apc 12x6 on my Saito 62 engines, but on this one I've went with a master airscrew 12x6 k series. 1 Quote Link to comment Share on other sites More sharing options...
Martin Arnold 1 Posted January 18, 2022 Share Posted January 18, 2022 9 hours ago, aidan mcatamney said: Thanks Martin. I normally go with an apc 12x6 on my Saito 62 engines, but on this one I've went with a master airscrew 12x6 k series. Spot on with the 12x6 on a 62 for a trainer, have to say Master aren't my favorite make, I often use a Graupner Super 12x6 on my 56/62 Saitos. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted January 18, 2022 Share Posted January 18, 2022 (edited) With 11 x 6 and 12 x 6 being in such short supply Maybe just use whatever make is to hand Nice to see you chose the 4 stroke. Edited January 18, 2022 by Denis Watkins Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 18, 2022 Share Posted January 18, 2022 9 hours ago, Martin Arnold 1 said: Spot on with the 12x6 on a 62 for a trainer, have to say Master aren't my favorite make, I often use a Graupner Super 12x6 on my 56/62 Saitos. Might try one of those props sometime Martin. Quote Link to comment Share on other sites More sharing options...
aidan mcatamney Posted January 18, 2022 Share Posted January 18, 2022 6 hours ago, Denis Watkins said: With 11 x 6 and 12 x 6 being in such short supply Maybe just use whatever make is to hand Nice to see you chose the 4 stroke. Yes Denis, I love the fourstroke sound. Quote Link to comment Share on other sites More sharing options...
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