Dan Hedges Posted July 31, 2010 Share Posted July 31, 2010 Hi All, I hope I am posting this in the right section, I am looking for a bit of advice regarding the Harmony. In the past I have built and flown many different types of model, including things like the Gangster, Acro Wot and various scale models. I am not short of flying experience... however, I have not flown anything at all for about 10 years now! Recently I saw the Harmony on the front of RCM&E, so bought it in order to get the plan (to my eyes it is a very pretty plane!). So finally onto my question, in peoples opinion would the Harmony be suitable for someone returning to the hobby after a break? Thanks for any advice and thoughts. Dan. Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted July 31, 2010 Share Posted July 31, 2010 Hello Dan and welcome aboardIm sure Peter himself will be along shortly to advise - I doubt the harmony is difficult to fly, but perhaps some stick time on a bouncy type trainer model first would be a good idea just until you get the feel for it back. Best of luck and let us know how it goes Quote Link to comment Share on other sites More sharing options...
Dan Hedges Posted August 2, 2010 Author Share Posted August 2, 2010 Hi Tim, Thanks for the response. I guess that was really the question how easy is the Harmony to fly? I don't necessarily want to build a basic trainer type model as I fear I may be bored with it after a few flights, but I also don't want to overestimate my own ability! Any thoughts are welcomed. Dan. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted August 14, 2010 Share Posted August 14, 2010 Sorry to be so long. I forgot to check threads on this section of the forum. Harmony on the lower powered engine that I am using is very nice but if you plan to use a .25 it will be much faster and it does get very small very quickly with the resulting problems of orientation in the distance. A fairly fast and aerobatic low wing trainer would be good if you are very rusty. Having siad that, one doesn't really forget, one just needs to get ones reflaxes back in training. Quote Link to comment Share on other sites More sharing options...
Andy Harris Posted September 20, 2010 Share Posted September 20, 2010 I'm thinking: 600W electric Pale green with roundels Some letters and numbers and then passing the Harmony off as a rare experiment Spitfire than flew properly ... Andy Quote Link to comment Share on other sites More sharing options...
Dan Hedges Posted September 20, 2010 Author Share Posted September 20, 2010 The idea of building an electric powered harmony seems good to me! I eventually bought an eRC mustang to "test" my flying ability, seemed alright so I got a parkzone spitfire which flies nicely (and I now know I can remember how to fly!). I stil lhave the harmony plan and some balsa ready to begin though so I reckon I wil start building it soon. I can't join my local club until next year though as they are not taking any new members at the moment, so perhaps it will be my first IC model to fly there! Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted September 20, 2010 Share Posted September 20, 2010 Er, ALL Spitfires flew properly! I must admit that the Thunder Tiger 18 could well be replaced with a more powerful engine, a good 20. Dan If you can fly the Parkzone Spitfire you can fly Harmony easily. Quote Link to comment Share on other sites More sharing options...
Dan Hedges Posted September 20, 2010 Author Share Posted September 20, 2010 Thanks Peter, I will make a start on it I think. It is a great looking plane! Dan. Quote Link to comment Share on other sites More sharing options...
Peter Howard Posted November 4, 2010 Share Posted November 4, 2010 I ran across the Peter Miller plans this summer while traveling in the RCM&E magazine. I was very impressed - nice design and write-up Peter. I started out on the wings about September time frame - hope to have it airborne early next spring. At the speed I build (depends on available time) I may have the wings done mid December. I'm also planning an electric conversion - 600w w/ 3-4 lipo bat. Anyone have experience with this conversion? If so, what was the final weight / wing loading? Dan - did you decide to build the Harmony and have you started it yet? Peter Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted November 4, 2010 Share Posted November 4, 2010 I would have thought 500 Watt would be sufficient, and then you could just about get away with a 3s battery which would help keep the overall weight down. I believe the original flew just fine on a .25 - therefore 500 watts is about right.Welcome to the forum BTW Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted November 4, 2010 Share Posted November 4, 2010 Hi Peter. Glad that you like Harmony, she is a nice model. Don't ask me about electric conversions, I just don't know any thing about electrics. Peter Quote Link to comment Share on other sites More sharing options...
Jimbo565 Posted November 4, 2010 Share Posted November 4, 2010 Dan, Go for it,its a great little flier,I had mine built in about two weeks after the plan came out SC25 in mine and its great, ( sounds just like a Golf ) looks just like a Spitfire in the air. JIm Quote Link to comment Share on other sites More sharing options...
Peter Howard Posted November 5, 2010 Share Posted November 5, 2010 Posted by Tim Mackey - Administrator on 04/11/2010 19:12:21:I would have thought 500 Watt would be sufficient, and then you could just about get away with a 3s battery which would help keep the overall weight down. I believe the original flew just fine on a .25 - therefore 500 watts is about right.Welcome to the forum BTW Good advice - I was leaning towards the high side on power as I'm not sure what the final weight will be. I've modified the aileron design to include two servos, allowing me to have flaperon control - thus the extended build period. I've been successful with this type of modification in the past, but it does add a little weight. In addition, there will be added weight for the battery. Question: I don't see on the plan any allowance for engine offset for torque. Would anyone recommend I take this into consideration? Peter Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted November 5, 2010 Share Posted November 5, 2010 Under no circumstances use the ailerons as flaps. They are out at the tip and will cause a tip stall. The wing has wash out to prevent tip stalling, dropping the ailerons will make them wash in, Instant tip stall. Quote Link to comment Share on other sites More sharing options...
Peter Howard Posted November 5, 2010 Share Posted November 5, 2010 Wow - ok - thanks. Good thing I'm not that far along. Perhaps some additional study on my part is in order. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted November 6, 2010 Share Posted November 6, 2010 You can still use two servos for the ailerons. Just don't make them work as flaps. You don't really need flaps on this model but if you wanted them make the inboard part of the wing into the flap. Quote Link to comment Share on other sites More sharing options...
Peter Howard Posted November 6, 2010 Share Posted November 6, 2010 Peter - I bounced around the web yesterday and learned a lot. Now I know why flaps are on the inside of the wing and separate from the ailerons. I see you have several books out. One titled "Designing Model Aircraft" may be the ticket. I'll be adding it to my Christmas list. Thanks again for your advice... Peter Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted November 6, 2010 Share Posted November 6, 2010 Right, well done. Now to the exceptions. You will find that STOL aircraft will have parallel chord wings. there are far less liable to tip stall. They will have big flaps/ Quite often such aircraft will droop the ailerons a little. The point is that the flaps come down a long way but the ailerons only a little. This gives the same effect as washout. Quote Link to comment Share on other sites More sharing options...
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