Originally Posted by
immelman50
I copied Doug's power set in a Calypso and it worked perfectly. A friend has a Calypso with a Hanno special in it, piped naturally. On the ground we turn the same RPMS with the same prop. ( Either a 12X11 or a 13X9). I've flown both and the flying experience is very similar, but I suspect the OS 61 unwinds a bit more in the air than the Hyperion 4024-10 on 6 cells. I don't have empirical evidence for that, but it seems so.
Chuck,
it's good to hear that you are happy with your e-converted Calypso. I have a MT ARC kit put away with the plan to use electric power as well. I have a Scorpion just like Doug's but I think I'm going to keep it for a slightly larger model where I can spin a 13" more easily. For the Calypso, I'd like to turn a 12" prop max and will likely aim to use a higher Kv motor in the 650-700 Kv range also on 6s.
David's (doxilia) reduced size plans for the Tiporare make a very nice flying plane in the .25 size. I built one using an OS 25 FX and a 9X6 prop, but I think it would be perfect for the electric set up mentioned by David above. I extended the wing a bit to 50inch span.
Thanks for the T25 reference!
I received the OS EF1 1200 Kv motor the other day - it actually came straight from Japan... I had it drawn up on my plans and was happy to see that it is a 1:1 match and will fit very nicely in the model. Part of the problem (which I had on the 40" span Pico) with motors is the prop adapter which sometimes can be rather large and require a larger than desired opening in the nose ring making it a little unwieldy up front. The OS motor uses a collet type adapter which is quite narrow and grabs on to the motors shaft instead of being bolted on to the can. Scorpions used this system too until recently. In short, the can of the motor stays a fair bit behind the nose ring and backer making for a clean and non interfering setup.
I'm a little OD'd on drafting at the moment as I've prepared several models lately for the cutters. Summer is also coming but sometime in July or August I will get a proto of the T25 done and built up. I'm not certain which one will get done first (glow or electric) but I have two sets of wings, stabs and verticals waiting for their fuses to be completed.
Incidentally, I also sourced some E-Flite 15-25 retracts and they are perfect for the model. Just like the 10-15 units but with stronger 3.5 mm (a tad over 1/8") struts. I plan on using 1-3/4" wheels all around.
David