Rob Dunn Posted June 5, 2014 Share Posted June 5, 2014 I have an os 91 2stroke in mine which I used to pass the B and Examiner's fixed wing. I have 2 batteries fitted to a ply plate which was moved around to get the correct C of G no extra lead was used. I am happy with the set up. Quote Link to comment Share on other sites More sharing options...
John Allen Posted June 5, 2014 Share Posted June 5, 2014 Where did you put the ply plate Rob? Quote Link to comment Share on other sites More sharing options...
Lee Smalley Posted June 5, 2014 Share Posted June 5, 2014 Flew ok is a bit harsh, for 130quid she flies magnificently blenders, rolling circles spins upright, inverted and knife edge very good and virtually no coupling with rudder! Not a dedicated 3d machine but for 130quid what do you want, great model!! Quote Link to comment Share on other sites More sharing options...
Rob Dunn Posted June 5, 2014 Share Posted June 5, 2014 ply plate is just under the rudder servo Quote Link to comment Share on other sites More sharing options...
Rob Dunn Posted June 5, 2014 Share Posted June 5, 2014 Wrong I placed the batteries under and either side of the rudder servo using Velcro straps . Did use a ply plate at first which is still in place the model was tail heavy so moved them. Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted June 5, 2014 Share Posted June 5, 2014 My tail servos are fairly light but I had to locate my batteries on a piece of balsa extending back to the base of the fin to balance the 180FS I fitted originally. The 120FS currently fitted hasn't required any modification of this arrangement... Quote Link to comment Share on other sites More sharing options...
John Allen Posted June 5, 2014 Share Posted June 5, 2014 What motor are you using Rob? Quote Link to comment Share on other sites More sharing options...
John Allen Posted June 6, 2014 Share Posted June 6, 2014 I see you've replaced the 180FS with a 120FS Martin, do you prefer using the 120, or was there another reason. The 180FS is 1040gm, and the AGM/DEL 30 is 1100, so if you loved it with the 180, I can be happy with the MVVS G26, or AGM/DEL 30. Quote Link to comment Share on other sites More sharing options...
John Allen Posted June 6, 2014 Share Posted June 6, 2014 @Lee Smalley, according to Supre Tigre's website the g2300 has a weight with muffler of 38.0 oz (1077 g) So my MVVS G26 is only 23g heaver, and the AGM30 is similar at 1091g I'll go with the MVVS, whats the worst that can happen Edited By John Allen on 06/06/2014 15:50:33 Quote Link to comment Share on other sites More sharing options...
Chris Anthony Posted June 6, 2014 Share Posted June 6, 2014 Chaps can I ask where you all bought your Seagull Yak 54's from? I'd love to get one in the yellow and black livery but am having a bit of a hard time finding them. I'm thinking about getting one of these as a follow on from an Acrowot, any flying advice in this regard? (sorry if you consider this a hi-jack, OP) Quote Link to comment Share on other sites More sharing options...
John Allen Posted June 6, 2014 Share Posted June 6, 2014 Try Sussex Model Centre Quote Link to comment Share on other sites More sharing options...
John Allen Posted June 6, 2014 Share Posted June 6, 2014 As a fllow-on from an Acrowot, you'll find it very exciting. Make sure you have low rates and lots of expo, get someone experienced to take it up first. Quote Link to comment Share on other sites More sharing options...
JimmyBH Posted June 6, 2014 Share Posted June 6, 2014 Got mine from these guys http://www.kingslynnmodelshop.co.uk/ Quote Link to comment Share on other sites More sharing options...
iqon Posted June 6, 2014 Share Posted June 6, 2014 I usually buy from kingslynn if they havent got one they can order or inwoods may have one Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted June 6, 2014 Share Posted June 6, 2014 Posted by John Allen on 06/06/2014 11:06:05: I see you've replaced the 180FS with a 120FS Martin, do you prefer using the 120, or was there another reason. The 180FS is 1040gm, and the AGM/DEL 30 is 1100, so if you loved it with the 180, I can be happy with the MVVS G26, or AGM/DEL 30. Performance-wise the 180 was excellent but although it originally squeezed through the club noise test, I was getting observations that it was rather noisy in the air. A 120 came along at a decent price so I put that in as I did have to admit that it sounded quite raucous and it flies more than adequately although with noticeably reduced vertical performance. The noise might be something to do with the particular engine as it had suffered a heavy impact in a previous model and seems to vibrate a bit more than I'd remembered - although it was in a very solid scratch built model before and big singles aren't noted for smooth running anyway. I did check the crankshaft run-out but couldn't detect anything out of true. If you look on page 16 of this thread there's an video of it flying on the 180 on an early flight. Edited By Martin Harris on 06/06/2014 20:03:18 Quote Link to comment Share on other sites More sharing options...
John Allen Posted August 31, 2014 Share Posted August 31, 2014 I've finally gotten around to building the Yak, I'm putting a DLE20 in, and had a right pain re-drilling the firewall. Now I'm on to the tail end, and the threaded rod for the rudder is not threaded all the way through, so will need to fix that. So I moved onto the turnbuckles for the horizontal stab, and they are too short, can get the nut on, even when using only one washer on the underside. anyone else have similar problems?? Edited By John Allen on 31/08/2014 20:53:15 Quote Link to comment Share on other sites More sharing options...
Codename-John Posted August 31, 2014 Share Posted August 31, 2014 I bought one at Cosford and I`m not far off through putting it together, I`m also using a DLE 20. I couldn't get the nut on turnbuckle with washers so I soaked the area with some thin cyano to harden it up a bit and went with just the nut, My threaded rod for the Rudder was just threaded enough to nip up tight when using one of the big Ali washers, normal washer, spring washer then nut, Didn't have any problem drilling the Firewall though, what was up with yours ? Quote Link to comment Share on other sites More sharing options...
John Allen Posted September 1, 2014 Share Posted September 1, 2014 Firewall problems were all mine. I marked the locations of existing holes in a cardboard template, rotated the template for inverted mounting, then widened as necessary, drilled holes, and damn not wide enough, just barely. Its quite difficult to drill when you're nearly there. I glassed up the entire firewall, rock solid. Edited By John Allen on 01/09/2014 09:25:50 Quote Link to comment Share on other sites More sharing options...
John Allen Posted October 30, 2014 Share Posted October 30, 2014 Yak on final stages of construction, here's some photos. From a preliminary check it appears to be very nose heavy, but will see how it goes when fully assembled and on the balancer. Edited By John Allen on 30/10/2014 21:41:35 Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted October 30, 2014 Share Posted October 30, 2014 Be interesting to see how it flies on that motor John..... Quote Link to comment Share on other sites More sharing options...
Lee Smalley Posted October 30, 2014 Share Posted October 30, 2014 Balance should be on the wing tube or just in front Quote Link to comment Share on other sites More sharing options...
John Allen Posted October 30, 2014 Share Posted October 30, 2014 @Lee I'll make sure the CG is at a safe position for maiden. @Steve I've seen a few YouTube videos with the DLE20 and it seemed fine, but there is no substitute for personal experience. I have an AGM 30, just in case the 20cc proves disappointing. Quote Link to comment Share on other sites More sharing options...
Rob Dunn Posted October 31, 2014 Share Posted October 31, 2014 Hi All. I had a Seagull Yak 54 with am OS91 2 stroke up front, She was a lovely flier used her for the B and Examiners she had no vices. Only had her for about 18 months she had over 50 flights when I fought lets try a snap roll on top off a loop nice and easy not to fast perfect then wait the left wing looks funny, No wonder the left wing ripped straight out off the fuselage and ripped in half to come of the wing tube well that was that could not regain control straight into the ground and straight into the bin. This has put me off Seagull models as this has happened twice now the other was the spacewalker on her maiden doing some circuits the tail started to flap she had broken in two and off course landed into the ground on inspection the longerons where not up to the job only soft balsa not even fitted correctly. Anyway would have another Yak 54 but different manufactory. Quote Link to comment Share on other sites More sharing options...
Lee Smalley Posted October 31, 2014 Share Posted October 31, 2014 Sorry dude I have had two of these lost the first to a mid air after 12 months and immediately bought another, I hammered them both full power inverted flat spins, blenders, etc and never once even looked like letting go, in fact I don't think any seagull kit has ever let me down mechanically and I have had dozens, I would always buy them Quote Link to comment Share on other sites More sharing options...
keith hunt 8 Posted October 31, 2014 Share Posted October 31, 2014 Re DLE20 - Super engine and bags of power in this airframe. Unlimited vertical and take-off in about 10ft. The AGM30 much larger and IMHO is far too heavy for this little Yak. Make sure to glue the pilot's head (they all fall off). Unfortunately, due to my pointing the aerial at the plane and it locking out, I can't comment on longevity. Remember that they are very low cost for what you get. Mine went through various knife edge & flick manouvres without signs of distress. Notably extremely forgiving in the stall and landing. Tricky to knife edge loop neatly and some speed on the drop is required before ruddering around the last part. I'd have another. Quote Link to comment Share on other sites More sharing options...
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