Barry Buxton

Thanks for the ideas guys, I’ll try retiming the esc later and add extra breather holes, failing that I’ll order a 3S fan. It as it’s a nice day here in Stoke on Trent I’m going to take the Riot out for a fly today and get back on this after Christmas. Have a good Christmas all

Yes, I calibrated the throttle and measured 36A / 500W at full throttle. I painted the plane after giving it a coat of eze-kote, grey primer rubbed quite well down after applying and 3 tins of humbrol enamel thinned out for spraying. Must admit I am thinking that the paint has added more weight than covering. I’ll put some extra vent holes in it and when / if the weather improves I’ll give it another go, would like to sort this out as I’ll be getting the Phantom kit for Christmas. As a matter of interest what is the best way to measure the static thrust, I basically hung it from a set of luggage scales and powered her up

Found out how to add photos if these help

Thanks Tim, without the access hatch I get about another 60g of thrust but I’m not convinced that’s going to be enough but I will add more access holes, not too sure how to shave 6oz off it though to get to your weight, I could lose 2 oz moving to a 3S setup but sacrificing thrust. I tried to see if I could upload a photo from my iPad but not too sure how to do that, do I have to create an album first then share from that ?

I fitted the FMS 4S fan into my gnat, very disappointed with it currently, using a 4S 2200 battery. The fan claims a 960g thrust but my basic testing in the gnat is only showing 500g thrust, drawing 30A current. I tried to maiden it but it just headed to the ground and I couldn’t get it to fly at all, total weight including the 4S battery is 26oz, how have others done with the gnat, I wondered about swapping to the 3S fan but I’d only save 2oz in weight and not sure if this would help at all. This is my first edf build so wasn’t too sure if I’d built too heavy or not or where to start looking to get it flying.