IAN MCCONNELL

Hi Pat The one I have recently purchased, now including battery and receiver (Ready to Fly) weighs 2405 grams. Mine includes ailerons and spoilers, activated by a novel (to me) mechanical system operated by a servo in the fuselage. Glad to hear yours at 2600 grams can out-soar alulas in a light wind, thought mine was a bit on the heavy side. Not sure I would have discovered the model until I saw your original photo. Thanks Ian

Hi Murat The plane came without a battery and I have installed a overlander 2500 mah NIMH 124 grams in the nose in an area where the old battery was obviously sitting and the COG came out at 98mm. So I am guessing that if he was flying with a 2000 mah battery (115g) it was pretty much dead on 100mm. So no guarantees, but 100mm seems to be correct. Probably not be flying for a bit because of the weather but will report back on smiles or tears on its first flight. Ian

Hi Murat I have managed to obtain photostats of the plans from a very helpful gentleman of the Wessex Soaring Association. However, unlike yours it does not have the actual measurement. I have measured the scaled down plan and it comes close to your 100 mm, so it is great getting confirmation and the actual measurement. Rich, I agree that it probably the swept back wings that is giving the impression of it being to far back. Will do some glide tests in long grass before I throw it off a large hill! Thank you everybody for your great help, it is amazing you can get detailed information from the 1980’s by simply posting in these type of forums. Thank you all for your time and enthusiasm. Kind regards Ian

Hi I have just purchased a glider out of an estate without an any specifications. I have managed to track down a post by PatMc on a John Hall Diamond and this appears to be the glider I have purchased. Not sure that PatMc had the original specifications since it dates back to 1980, but any help would be appreciated, particularly with the COG. Ian

Taken your advice and used a APC 10X5 prop with a slim 2700 (21 mm) 4S LIPO from Hobbyking. Problem is motor will only stutter and sounds like it is chewing the insides to pieces. Motor also gets exceedingly hot. After cooling motor replaced with 3 S LIPO and exerything runs smooth except obviously limited (250 -280 watts) on smaller prop. Attempted this twice with same result.