Peter Miller Posted March 9, 2020 Author Share Posted March 9, 2020 O BOTHER!! Edited By Peter Miller on 09/03/2020 15:48:30 Quote Link to comment Share on other sites More sharing options...
Basil Posted March 9, 2020 Share Posted March 9, 2020 Thanks P P P P Peter Barry Quote Link to comment Share on other sites More sharing options...
Steven S Posted March 23, 2020 Share Posted March 23, 2020 With all this spare shop time I decided to make a balsa and ply dummy motor for my Cub. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted March 23, 2020 Author Share Posted March 23, 2020 Great looking engine Quote Link to comment Share on other sites More sharing options...
bees Posted June 20, 2020 Share Posted June 20, 2020 Hi, just about finished the Cub but iam a bit puzzle on how to secure the batt through the front of the firewall. Would like to know how you guys have secured the batt, got to be through the front. Thank you Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted June 20, 2020 Author Share Posted June 20, 2020 Basically there is velcro epoxied to the battery box floor, and the battery just sits on that. The model is not aerobatic and is pretty steady sothe battery doesn't move. Simple,crude but it works. Other may have got more sophisticated. Quote Link to comment Share on other sites More sharing options...
bees Posted June 20, 2020 Share Posted June 20, 2020 Okay, Thank you, will give it try Quote Link to comment Share on other sites More sharing options...
Michael Guinness Posted June 21, 2020 Share Posted June 21, 2020 Good day gentlemen, I see this post is still active so I thought I would share my build info and some photos. I went for a more powerful option, Aerodrive 4240 740kv motor, driving a 14 x 10 prop, 60 Amp ESC and 4000mAh battery. 2.2 kg all up weight, a bit heavy but it does perform. The engine is partially 3D printed, as are the slats. To save weight I ordered the 5 inch foam/rubber wheels from the HK Tundra II. The flap hinges are the offset type, again from HK. Because I used a heavier motor, I mounted the battery on the C of G, access hatch below the cabin. No ballast was required. The model flies really well, loops, rolls and stall turns all possible. The best is the ridiculously slow approach and landing speeds with 90 degrees of flap. Has been an interesting build and not the usual two a penny Cub. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted June 21, 2020 Author Share Posted June 21, 2020 That is a very smart Li'l Cub Yes it does fly well and I am glad that you are obviously having fun with it. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted June 21, 2020 Author Share Posted June 21, 2020 Posted by bees on 20/06/2020 17:43:44: Hi, just about finished the Cub but iam a bit puzzle on how to secure the batt through the front of the firewall. Would like to know how you guys have secured the batt, got to be through the front. Thank you Bees JUst double checked. In fact my velcro is on the side wall of the battery box,not the floor. Don't worry, it still holds it very firmly. Quote Link to comment Share on other sites More sharing options...
Tim C Posted June 25, 2020 Share Posted June 25, 2020 Ready for maiden Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted June 25, 2020 Author Share Posted June 25, 2020 I shall look forward to the report. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted June 25, 2020 Author Share Posted June 25, 2020 Slow response from the Forum Edited By Peter Miller on 25/06/2020 18:24:38 Quote Link to comment Share on other sites More sharing options...
bees Posted June 25, 2020 Share Posted June 25, 2020 Mine is also ready for its maiden flight, will wait for a decent day looks like they have forecast rain tomorrow. Quote Link to comment Share on other sites More sharing options...
Tim C Posted June 26, 2020 Share Posted June 26, 2020 Maiden abandoned for today, gusty wind too much, resulting in flipping over while taxing Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted June 26, 2020 Author Share Posted June 26, 2020 Sorry about that. It is flat calm in Suffolk but going to be pretty windy over the weekend. Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted June 26, 2020 Share Posted June 26, 2020 Teach you not to try a maiden with the flaps down! These need testing at height first. Quote Link to comment Share on other sites More sharing options...
Tim C Posted June 26, 2020 Share Posted June 26, 2020 Ground handling was generally good, particularly as there is a steerable tail wheel. Flaps or not, turning in the wind in either directions it just flipped over, it was gusting 18+mph. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted June 26, 2020 Author Share Posted June 26, 2020 Well,what do you expect with a wind of 18 mph!!! Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted June 26, 2020 Share Posted June 26, 2020 Mine can have a mind of its own on take off and needs to be exactly into wind. Slightly off and full aileron and maybe some rudder is required to get it on track but once going it is fine. Quote Link to comment Share on other sites More sharing options...
bees Posted July 1, 2020 Share Posted July 1, 2020 Eventually the weather was ideal to maiden the Cub. Did not go well at all and iam completely baffled by what happened. No wind , did the usual range check, checked all controls for the right deflection and everything was okay. Took off gained some height and gave some right aileron and nothing happened if there was no control at all but managed to land safely by pure luck. Doubting myself did another range check and gave the ailerons a little more movement and tried again but to my surprised would not turn right so gave it some left aileron and she turned rather sharply due to the extra movement i added but once again my luck was in and managed to land it but ended with a broken prop so that was the end off my session. I have built a lot of models in my day and most of the time they have been successful but this episode this afternoon has really got me baffled. Quote Link to comment Share on other sites More sharing options...
Trevor Posted July 1, 2020 Share Posted July 1, 2020 I had one model that behaved like this. You may find that it will turn right if you back off the throttle. If so, try a smaller propeller. A bit more right side thrust might also help but reducing the torque is better than fighting it! Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted July 1, 2020 Author Share Posted July 1, 2020 That is the first time anyone has experienced that one. I have no side thrust on mine. Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted July 1, 2020 Share Posted July 1, 2020 Sorry to hear about your continued problems. Mine is powered by a SC30 FS which is about right, but with all the motor weight up front the cg is 55mm from the wing LE, and that is without fuel. It also has a fair bit of right thrust, about 2 deg. Aileron travel is: low rate up, 12mm. High, 14. Low down, 10, high 12.5. This is how I originally set it up. The wing has very little dihedral so should respond to ailerons reasonably well but this is not always the case. You could try mixing in about 30% rudder. A Lancaster for instance cannot be flown on aileron only, you just get adverse yaw and it will not turn. I have done a couple of o/d Cub lookalikes in the past which responded (or not) in a similar manner. On the maiden of mine it swung left and I nearly broke the stick willing it to straighten up but it did. That was on low rate. I now know the nature of the beast and can fly it with confidence. It was flown at the Buckminster Fly In last year in a crosswind. I would say that some right thrust would help you. I only have a 10x6 prop. so on leccy you may well be using a larger one which would give more left torque effect. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted July 1, 2020 Author Share Posted July 1, 2020 Mine uses a 13X6 high performance wood propeller as per George at 4-Max. It does not like a smaller prop Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.