Nigel R

I'm a bit late to this, but, on the dual nicd/nimh pack thing: "Their low internal resistance and negative voltage characteristic at full charge can cause thermal runaway situations." I'm with shaunie - parallel nicd/nimh cells or packs are a complete no for this reason. A fully charged nimh pack in 100% working order, hot off the charger, would be at great risk of starting to be charged further by a second pack connected in parallel. Nothing has to fail to get into this situation. A switch by itself isn't enough resistance to prevent this. The addition of a diode fixes this problem and prevents any cross (dis)charging. The chances of the diode failing are miniscule. Lipos are a different kettle of fish of course, parallel them up no problem.   Edited By SuperNash on 01/08/2016 11:54:37

Aurora 45 http://www.outerzone.co.uk/plan_details.asp?ID=5679 Martyn K's 40 sized mystic (partially enclosed) If you fancy resizing an existing 60 size design; Citation, Dash 5, Desire, Deception, Magic, Arrow. Lots of partly enclosed pipe designs for 60 size, Akro Special/Loaded Dice, Joker/Saphir, Supra Fly, Supra Star, UFO, Revenger, Illusion, Matador, Mach One.

Video linked to by O.P. was quite worrying. Doesn't seem to be much awareness of anything going on. Do they post anything other than crashes? I haven't looked - don't want to contribute to the view count which is no doubt driving the youtube page.

£5 for a 40V, that's a bargain. **LINK**

Posted by Adrian Smith 1 on 21/07/2016 19:34:52: I just want to find a simple blow by blow method in setting one up. I know I have Krumscheid's recommendations for my OSGT60 manifold length's starting point, but I just want to understand how they got to it. As I know it (tacho is essential):   Run engine in. Leave header at max length. Run engine, peak it, tacho it. Cut header a bit (1/2 inch). Run engine, peak it, tacho it. Revs went up? Repeat the cut/run/tacho cycle. Revs went down? Pull pipe back 1/4 or 1/2". Use an offcut from the header to fill the gap. Revs didn't change? You're done - go fly.   There are several simple formulas out there that will get a "close-ish" length, which might speed up the process. http://www.dmac1.org/text/ident/tips/tipsexplodingthemyth.html   Or for something a bit more detailed, try 'javapipe'. Edited By SuperNash on 22/07/2016 09:41:33

I'm late to this one, so excuse me if what I say has already been said. I'm not sure full size procedures are relevant to this discussion. This isn't a machine capable of carrying human (or any other) life. The model was a superb looking bit of kit. We have no reason to suspect maintenance was not in accordance with LMA procedure. The model was being flown away from spectators, in a display area where any kit problems would minimise any risk to spectators. It sadly suffered engine failure at the worst possible moment. Downwind at low speed and low height with a crowd nearby your options are as minimal as it gets. I don't see anything in the video that calls piloting skills into question. To my mind the only real lesson coming out of this is that multi cylinder two strokes have a big weakness, if they lose all power when one cylinder lets go for whatever reason. All the best to Mr Skipton getting the replacement bipe in the air.

Is it a kyosho rebadge of a sanye?

Light BBQ, nip inside,hear jets, nip outside, all 10 Arrows in formation at around 1000ft overhead, on their way home from Swansea. Cracking.

Thanks Bob Not many bids on the Hunter as yet On the nostalgia diesel front, I have yet to sell: Frog 100 1948 Frog 100 1950 Frog 80 1960 Frog 3.49 RC 1960 Frog 2.49 1960 Frog 100 1960 ED Racer ED Bee ED 1.46 diesel ED comp special 2cc 1948

another batch listed, see linked post

Ok, a few more for sale. MVVS 1.5 diesel **LINK** E.D. Hunter MK4 3.46cc **LINK** CLAN 0.24cc **LINK** A.M. 1cc diesel RC **LINK** KMD 2.5cc rear ind diesel **LINK** PAW 1cc RC **LINK** Enya 0.49cc RC **LINK** regards

Looks very nice. What are you forming the pipe tunnel from - planked balsa, rolled ply, something else?

would this: http://www.singahobby.com/?q=node/18130 be of any use? or, Novarossi make some headers that attach to stubs like that http://www.planethobby.com/products/40401

Bank Holiday Sunday, rare treat from Worcester based G-EWIZ running through what I assume is some of his display routine, at display level, right over our house. I'm guessing the nearby motorway was his 'crowd line'. 15 minutes of show standard aeros complete with smoke. Lovely job.

Posted by Ross Burgess on 19/04/2016 13:26:08: I have this beautiful Saito FA40A motor in my Junior 60. Crikey I used to have a Junior 60 with an HP 25 four stroke and that wasn't underpowered...

Wankel **LINK** AM 1.5 **LINK** Fox 25 **LINK** Merco 30 **LINK** Vega 25 **LINK** Fox 15 **LINK**

added a few more, see linked post

Within the next day or two, I'll be listing the following, I'll add links when they're up:   OS Wankel, run a handful of times, boxed, has the special plug. Vega 25 FS, used in several vintage models but in excellent condition, boxed. AM 1.5cc Glow, boxed. Merco 30 (a later premier plastics one, boxed, not sure if this has been used or not) Fox 15 & 25 (both boxed, both 70s vintage I think, both have a rotary exhaust valve and are crossflow plain bearing)       Edited By SuperNash on 13/04/2016 13:06:08 Edited By SuperNash on 13/04/2016 13:07:29

Posted by Peter Beeney on 07/04/2016 09:42:11: However, modern engines with management systems that can take care of every conceivable running condition, all at the same time, and can then pass it on to an injector in a twinkle may be rather different. A few of my colleagues have worked on engine management systems, word is that acceleration enrichment is still done by these systems.

Hi Doug I think I've listed it as 0.49cc? I didn't know it had a 'proper name' though.

  I’m of the school that believes one of the reasons why our model engines are relatively so powerful is simply because of the amount of fuel they are able to burn. We burn over twice as much fuel in a glow. More energy in petrol though. Overall I agree. There's a good reason why (some) race cars use methanol.   Natural gas: 17.2 Gasoline: 14.7 Propane: 15.5 Ethanol: 9 Methanol: 6.4 Hydrogen: 34 Diesel: 14.6   Edited By SuperNash on 06/04/2016 16:58:56 Edited By SuperNash on 06/04/2016 16:59:24

open your throttle the mix is the same but more of it is sucked in   basically, yes. top end mix is set with the main needle, get the idle mix right with the idle needle (also affects throttling), get the idle speed right with the servo travel our glow carbs are a very low tech route to setting fuel air mix, but we don't really care about efficiency or emissions, just that the motor runs reliably. also, glow engines will run on a very wide range of air fuel mixtures, I think we get away with having very simple carbs. petrol is a bit more fussy   Edited By SuperNash on 06/04/2016 16:58:42

I should add, there will be more when these 3 finish.

Hi all Started listing some engines. These are just the first three, more will come later.   Thread in the ebay watchers section here: http://www.modelflying.co.uk/forums/postings.asp?th=116427 Edited By SuperNash on 05/04/2016 10:46:18

I'm disposing of my dad's collection of engines. A number of these will maybe be of interest to collectors on the forum. I thought I'd put a thread here to update and if anyone wants to ask anything about them, etc. I'm selling on Ebay (I know, I know). Currently listed: Silver Swallow 1.49 diesel **LINK** G Mark 2cc Twin glow **LINK** G Mark 0.49cc Glow single **LINK**