john Bains Posted August 2, 2017 Share Posted August 2, 2017 Hi , looking for some advice , I have almost finished refurbishing a damaged H9P47 Razorback , there was some damage to the fuse tail and i had to rebuild it and have added a tail retract (electric HK special) when I balance it with the Cof G at 100mm from the leading edge at the wing root , i need 630 grams of lead to get it to balance , there is an OS 120 fs in the nose already it seems an awful lot of weight , i know the real a/c has a massive radial up front anyone had to add similar amounts to their's ? thanks John Quote Link to comment Share on other sites More sharing options...
Former Member Posted August 2, 2017 Share Posted August 2, 2017 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
john Bains Posted August 2, 2017 Author Share Posted August 2, 2017 Thanks Steve , i think i will have to do the same , otherwise it will cost more in lead than the plane is worth!!! cheers John Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted August 2, 2017 Share Posted August 2, 2017 Warbirds are notorious for requiring what appears to be excessive weight up front John But they do need this to fly, and as a rule, they fly very well in this condition Quote Link to comment Share on other sites More sharing options...
Jon H Posted August 2, 2017 Share Posted August 2, 2017 a friend has one powered by an enya r120 and he has plenty of lead up the nose. I wouldnt be worried. Quote Link to comment Share on other sites More sharing options...
Bucksboy Posted August 2, 2017 Share Posted August 2, 2017 I've got one of these but it's un flown. I've electrified it with everything Hangar 9 recommend and I went to balance it. It does seem to want a lot of lead. My problem was that I couldn't get the wings to push in the last half an inch. Neither together nor one at a time so it's not the wing tube causing problems. I only had a short window of opportunity to get it ready for flight so gave up and shoved it back in the loft and flew something else. I bought it second hand but untouched. I never thought to check the wings actually fit! Let us all know how it flies! Quote Link to comment Share on other sites More sharing options...
john Bains Posted August 2, 2017 Author Share Posted August 2, 2017 hi , I had the same problem with the wings as well ! thought it was because i had glassed them , just need to give the face rib a gentle sanding and make sure your servo cables are routed out via the round holes and a gentle tap seats them in fine, dig it out of the loft and give it a go , cheers John Quote Link to comment Share on other sites More sharing options...
Rich too Posted August 3, 2017 Share Posted August 3, 2017 Yes, my H9 P47 Thunderbolt has a DLE 20 and plenty of lead on the nose! Quote Link to comment Share on other sites More sharing options...
Jon H Posted August 3, 2017 Share Posted August 3, 2017 I flew one with a DLE20 and another with the Enya 120. The Enya version was nicer to fly for sure due to the smoother power delivery of the 4 stroke but both models really fly well. Just remember that with flap down you have a shed load of drag so keep some power on, and i think the flap angle in the instructions is excessive but cant remember, i will have to ask the guys what they did with theirs Quote Link to comment Share on other sites More sharing options...
Jon H Posted August 3, 2017 Share Posted August 3, 2017 Apparently the flaps are fine, i got muddled with another model the guy owns! Quote Link to comment Share on other sites More sharing options...
Former Member Posted August 3, 2017 Share Posted August 3, 2017 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
jrman Posted August 3, 2017 Share Posted August 3, 2017 Mine has a Saito 125 and NO lead. It flies very well. Quote Link to comment Share on other sites More sharing options...
Tim Flyer Posted August 3, 2017 Share Posted August 3, 2017 I took my Hangar 9 P47 back to the shop a couple of years ago and was refunded as the wings really didn't fit. I now have the Seagull version which I am much happier with. As said above warbirds often need front lead. If you added a tail retract that makes quite a big difference especially as the tail is a long way back from c of g. I'm not surprised you need a lot more. Happy Flying. Edited By Timothy Harris 1 on 03/08/2017 10:17:27 Quote Link to comment Share on other sites More sharing options...
john Bains Posted August 3, 2017 Author Share Posted August 3, 2017 Thank everyone for your help, will make a shelf over the engine for balance weight in the next few days and hopefully if the wind drops for more than 10 mins I will get her airborne next week John Quote Link to comment Share on other sites More sharing options...
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