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Member postings for Martin McIntosh

Here is a list of all the postings Martin McIntosh has made in our forums. Click on a thread name to jump to the thread.

Thread: Li`l Cub
17/06/2019 21:09:49

I have not done a blow by blow build thread on this but will keep you posted as it progresses. If the i/c option does not work out then it is easily converted to leccy. I shall not bother with a dummy engine as yet for that reason.

Thread: Dambusters Raid
17/06/2019 21:04:26

Martin H, you beat me to it. This is a fascinating book and, as you say, devotes most of the text to what they did after the dams raid. Obviously a lot of it is guessed at since this did not become declassified until 1993 (50 years after). Lots about a new type of bomb sight which could not be named at the time but I would think that it was the Sperry bomb sight computer to enable accurate dropping of the Tallboys and Grand Slams.

I visited the Mohne and Eder dams in 1975 when I went to Switzerland to spectate at the F3A world champs, spending the next week in Germany. You could just about make out where the repairs were made. They are a major tourist attraction. I do not speak German but the captions to the photos of Guy Gibson there were obviously none too complimentary.

Jon, I have lent my copy of Paul Brickhill`s `The Dambusters` to Sid in our club but if you ask I am sure that he would let you have it.

Thread: Li`l Cub
17/06/2019 20:10:08

Anyone else out there attempting this? I like the odd offbeat thing, and having built a couple of Peter`s designs in the past I have every faith in it.

Looks like just another simple Cub on the face of it but not quite so.

I had no 1/4" hard balsa dowel and the LMS only had loads of soft stuff. I did, however, have just enough 4 and 5mm carbon tube for the longerons. This made construction a little more difficult but I got there in the end. Aligning the fus sides was not easy, and mine is not quite right but it will do. It is very rigid.

Don`t make two left hand sides will you since that would be daft!

The wing looks to be pretty normal but I changed the order of assembly a bit then wished that I had not done so.

The servo wire holes need to be a little further aft, otherwise the centre section ribs become rather delicate where the dihedral brace slots are cut.

I have top hinged the ailerons to give a little built in differential.

Servos will be Corona DS939HV since I shall be using a LiFe pack. No electrickery in this one. I had an OS 26FS and 52FS available but neither looked to be suitable so have obtained an SC30FS to try.

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I did not intend to start a thread on this until it was finished and tested but here it is anyway so far.

Thread: Lidl XL Glider
08/06/2019 17:46:51

If anybody wants an original one unopened, I shall be at pilot`s camping slot D at W&W. £8.00.

Thread: Chicken hoppers and fuel head issues
30/05/2019 16:58:25

I shall repeat a pic here of my Stampe tank set up for a Laser 155. Works great.stampe 012.jpg

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OK, a few then. The top 9oz feeds the lower 6oz. Both have clunks. Inverted flight is no problem.

Thread: TomBoy 48" kit
26/05/2019 16:10:23

Yer tis, a bit grubby after a long layoff.

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26/05/2019 15:28:28

The Tomboy 48 is the Senior Tomboy. I use a Mills 1.3 which is what it was designed for. If you really must go leccy then you may as well use a large battery rather than add lead.

25/05/2019 22:27:49

I built mine quite a few years ago but seem to remember using hard-ish balsa for the spars, the rest can be as light as you can get. The whole model will be very light anyway, especially if covered in Solarlite or similar.

Thread: Don't just stand there, get one up!
25/05/2019 22:14:29

More work on the u/c and thought that it was OK now so took it up again a couple of days ago, this time with as much extra church roof as I could squeeze into the nose. Wheels up no problem and it now handles much better although being very much lighter than my other one it is rather over powered, in fact the only time that I fully opened the throttle was for a loop. Alas one leg refused to come down so I had to belly it with no flaps. A trip to the local model shop got me two new servos, and after a long time setting them up I am now satisfied that all is fine. Why do these things wait for a field visit before failing? Looks a tad windy tomorrow but we shall see.

Thread: Petrol engine cutting out on take-off
24/05/2019 21:12:04

Sounded as though dirt was being pulled through the fuel line. Filters from the fuel pump and tank to motor need to be much finer than for glow fuel. Once crap is in a diaphragm carb. it can be difficult to find and remove. I have had more motor cuts for one reason or another on petrols than any other type.

Thread: Precedent Stampe 1/4 Scale
24/05/2019 20:55:43

On a different note I think that we should be allowed to fly standing by the runway rather than being herded back into a line way off. I found this unexpected, difficult and unnecessary last year particularly with my Spit. I noted that the star solo performers were not expected to do this. Also, why should we fly from right up one end of the field? If they want to do the same this year I shall take it up with the flightline director.

What was your motor doing after the replacement parts were fitted Pete? Same as before?

Flew my new Spit. again yesterday with lots more church roof up front and it is much better but a leg refused to come down. New servos for the retracts bought today but time for me is running out so may just take the old one.

24/05/2019 15:17:22

Yes, I meant Tiger Team.

24/05/2019 11:19:14

Got my W&W pass today. Slots are Stampe and WW2 (small).

Thread: Peculiar petrol engine idle
22/05/2019 20:10:03

I have an RCG (not RCGF) 30 which is fine, also a similar RCG 50. The 50 started to quit after 2.5 mins in the air or on the ground. Someone spotted a tiny piece of black crap in the fuel line just by the carb. It could not be sucked out due to the diaphragm being closed but I got it out in the end. Could be a similar problem with yours. Hope you sort it before W&W.

Thread: Lidl XL Glider
22/05/2019 19:44:32

I still have an original kit. If you want it I shall be at W&W.

Thread: Cordless - Dremel or Aldi special?
20/05/2019 18:34:02

I bought a cordless Dremel when I was working in the US in 1998 (had to get a 240 to 110V transformer). The 7.2V NiCad still holds full capacity, the drill permanently has a 1/16th" bit in it and is so small and handy it is untrue. Would not be without it. Current ones are not US built (Russian I think). I bought an Aldi (or was it Lidl) one as a spare. Works fine and can recommend it. Also have mains B&Q one (Skill) which is great for the heavier work and you can still get spares for them.

Thread: Forum members' new models: Let's see them.
20/05/2019 18:18:45

Looks great.

Thread: Charge currents
19/05/2019 16:47:58

Got me stumped there. Are you sure that the meter read 35V and not 0.35V or 3.5V?

They cannot be LiFe because the two together would be 26.4V, not 24V. Only NiMh, NiCad or lead acid can give 24V in total unless the stated 24V is just nominal. Li-on cells could also be somewhere near and much more likely to be found in a drill these days.

Is it the charger which came with the drill or something else?

Thread: Poll for who intends to register.
17/05/2019 20:44:14

I asked before the thread was closed down if there could be a poll on this forum for who intends to register. Can this be implemented please?

Thread: Precedent Stampe 1/4 Scale
17/05/2019 20:34:41

Not managed to fill it in either, so shall just have to ignore it. Pointless if you are flying in more than one slot with a choice of models. Don`t know why they should need to make it so difficult.

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