Nigel R

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**

Mk2 has the small "bumpy" transfer port. Mk3 maybe had both bearings at various points, depending on what was available. If the supply of hybrid bearings dried up then nearest metric would be the obvious thing to go to.

That looks like a 40 mk3, I think.

There's a fairly typical looking 2 stroke power graph for the (very old - mk1) Irvine 40 here: **LINK** At 12k rpm, with a silencer, it makes around 0.8bhp, compared to the peak (what the advertising would claim) of 1bhp at 17k rpm with open exhaust. So you still get a good chunk of the power at the lower revs with a silencer. At the same time, bigger props are more efficient - so more of your 0.8bhp gets turned into thrust. Ultimately, try a few different props, keep it around 11/12k, see what works best for a given model.

Mk2 sport were definitely the Irvine product. And they were a quality motor - Irvine were a good brand in their own right, before they were used as the budget department of another manufacturer. When OS took over when they were all red anodised. However, if it's red and says "made in england" its pre-OS.

E.D. trebor's Irvine will be from the '80s if it is a mk2. Posted by trebor on 24/03/2016 09:27:15: Solent Bearings in Southampton have been a great help, they have located one somewhere but there source wants nearly £50 + £8 postage ouch! PS if you want to sell the jetstream carb, I will take that bit of it.

**LINK**   rear bearing listed as 1 1/8" x 15mm   best of luck finding one, its an odd size   it might be easiest to find a bust 40mk2 to salvage the bearing from.   Edited By SuperNash on 24/03/2016 09:23:15

Posted by Erfolg on 29/02/2016 20:15:16: Those who advocate elipitical wings often suggest that they are more efficient. The lift is in theory can be distributed evenly, right down to the tip. The downside is that the ideal ellipse will stall pretty much simultaneously. So the wing is often washed out, In dong so much of the theoretical benefit is compromised. I guess the thing that strikes me about elliptical wings is that very very few types have them (and no recent types that I can think of) - almost all full size has converged on the same solution, i.e. slightly tapered (ignoring anything flying close to speed of sound, which brings its own problems and solutions). A straight taper can be engineered to have almost identical lift distribution to an elliptical planform anyway. Excellent post BTW, Erfolg. As you say, for power flyers the planform almost doesn't matter. In a model we can out-power any inefficiency a particular planform will exhibit.

looks superb!