Denis Watkins Posted April 8, 2020 Share Posted April 8, 2020 That looks absolutely mint Martin. Very tidy. Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted April 8, 2020 Share Posted April 8, 2020 Thanks, but don`t look too closely. Seem to be losing my touch in old age. Quote Link to comment Share on other sites More sharing options...
Geoff Gardiner Posted April 8, 2020 Author Share Posted April 8, 2020 No problem with posting here - looks great Martin. Dare I ask, what is the all up weight with battery? Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted April 8, 2020 Share Posted April 8, 2020 Trying to avoid divulging this, but with a 3300 plus the nose lead it is, say it quietly, 29oz. I very carefully selected the balsa and am actually a bit worried that the wing may be a bit too soft and light. The weight does not really surprise me because compared with others in the range it is rather chunky. My Gnat is spot on weight wise. Quote Link to comment Share on other sites More sharing options...
Lucas Hofman Posted April 8, 2020 Share Posted April 8, 2020 When there is enough power is should fly. Might be a fast landing though. Good luck with the maiden, when you are allowed too. Here in Norway restrictions have been eased so we can fly again on our patch, with some distance between us. Lucas Quote Link to comment Share on other sites More sharing options...
BSR Posted April 10, 2020 Share Posted April 10, 2020 'printed off a set of decals'. Those look superb, could you quickly run through how you did that? I have the same Silhouette cutter, how did you combine the two processes or was the cutter just used in the lift and place proceedure you showed? I tend to use the Silhouette for larger sized projects as the vinyl is a bit thick, can you recomend a thinner if thats what you used? Thanks, sorry for the interrogation. Quote Link to comment Share on other sites More sharing options...
BSR Posted April 11, 2020 Share Posted April 11, 2020 Remind me next time to let the whole page load before diving in with questions... the answers were all there! Apologies. I blame this virus..... Quote Link to comment Share on other sites More sharing options...
Geoff Gardiner Posted April 11, 2020 Author Share Posted April 11, 2020 No problem - I was wondering how to answer Quote Link to comment Share on other sites More sharing options...
Geoff Gardiner Posted June 23, 2020 Author Share Posted June 23, 2020 Well, thought I would try for a maiden flight today as I had a flying buddie with me who was happy to hand launch for me. The first few attempts were failures just straight to the ground. I then took the top hatch off and after a couple of more attempts we managed to get it away and had a 3 minute flight whilst tinkering with the trim. It does get small very quickly!. After that we had another half dozen or so attempts with a fresh battery - all failures. Conclusion - needs a bit more work. Quote Link to comment Share on other sites More sharing options...
Martin McIntosh Posted June 23, 2020 Share Posted June 23, 2020 This may well be on another thread but what battery are you using and have you measured the thrust? Model weight? Quote Link to comment Share on other sites More sharing options...
Geoff Gardiner Posted June 24, 2020 Author Share Posted June 24, 2020 It's on the previous page Martin. Final weight is 804g (28.3oz) all in. I have been playing with the cheat hole to maximize the thrust. 1. 49x35mm hole (as per plan) gave 500g of thrust. 2. 49x45 hole gave 525g of thrust. with top hatch removed this increased to 590g 3.49x49 hole gave 540g of thrust with top hatch on. I was using a 3s 2200mah 50c battery. Quote Link to comment Share on other sites More sharing options...
Steve Jones 2 Posted July 13, 2020 Share Posted July 13, 2020 Hi there, An update on my Provost... It has always flown ok, once the tricky launch is mastered.. needs the biggest shove off of all the models (Gnat, Hunter & Hawk) but I have always been a little disappointed at the performance. It seems to need more power than the others. So looking through your posts I decided to enlarge the underside cheat hole to 65mm by 45mm. I added a little more nose weight to move the cog a little... WHAT a transformation !! Now the take off is still tricky but once in the circuit the cruise power is much less and the flying much much smoother. Gone is the tip stall in the turns tendency.. RESULT !! So now she joints the fleet as a great flyer .. well pleased Steve Edited By Steve Jones 2 on 13/07/2020 22:29:50 Quote Link to comment Share on other sites More sharing options...
Steve Jones 2 Posted September 21, 2020 Share Posted September 21, 2020 Another day out and first flight of the day , flying towards the sun and oops wrong direction and next I’m in a ploughed field .. not good and completely my fault. Walk of shame to collect the kit and not as bad as I thought!! Some reconstruction and covering and back in the game . Tough little model this !! Quote Link to comment Share on other sites More sharing options...
adrian garnham Posted June 4, 2021 Share Posted June 4, 2021 On 01/03/2020 at 12:45, adrian garnham said: Looks great. I built one a few months ago and it too came in on the heavy side ... about 800g inc 2200 mah. I used the powerfun 50mm fan running on 4s ... should have given given around 765g thrust which I think would have been ok I feel. However, when I measured the thrust coming out the rear end of the provost I was only getting around 370g thrust. That's why it wouldn't fly /CuteEditor_files/images/emsad.gif I removed the fan and tested it on the bench and was getting near to the 765g. I then added a thrust tube of the same dimensions as in the provost and the thrust went down to around 400g on the bench. Fitting a constant 50mm tube brought the thrust back up to near the 765g mark. I am currently finishing off my home made CNC router but once done I plan to revisit the provost and re-designing it around a constant 50mm tube. Hopefully it will still look like a provost /CuteEditor_files/images/emsmile.gif Following my previous post .... I decided to redesign the provost (based loosely on Tony's balsa design) to accommodate a constant 50mm dia thrust tube and to ensure it would be light I made the fuselage and wings from hot wire cut foam. The resulting model doesn't look pretty as it is very experimental but it flies extremely well considering I have never designed a model aircraft before. All up weight including a 4s 2200 maH battery is 710g. Static thrust measured by placing the nose on a set of scales is 735g. I am using the same esc and powerfun EDF as before .... go figure. Quote Link to comment Share on other sites More sharing options...
Geoff Gardiner Posted June 25, 2021 Author Share Posted June 25, 2021 I haven't tried flying mine since it's initial maiden. In view of the difficulty I had with the hand launch I have built a bungee launcher with stuff I had lying around in my shed and some 3d printed snap tee connectors. Hope to try it soon. Quote Link to comment Share on other sites More sharing options...
Andrew Douglas Posted November 24 Share Posted November 24 Hi all, just about to start covering my JP and a bit undecided what to do with the ABS air intakes ? Had any one covered them ? I’m having trouble matching the paint for the solar film I have Quote Link to comment Share on other sites More sharing options...
Geoff Gardiner Posted November 24 Author Share Posted November 24 Hi Andrew, If memory serves I took some of the film covering to B&Q and had it scanned and a tester pot made up. Quote Link to comment Share on other sites More sharing options...
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