Nick Cripps
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Posts posted by Nick Cripps
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29 minutes ago, toto said:
I will be adding the brass rod to the clunk line as mentioned before but could do with a further explanation into the grooves in the clunk itself..... I don't get that at all.
If you make the clunk tube too long there is a risk that the the end face of the clunk can stick to the rear of the tank (by suction from the carb) and stop fuel flowing. The purpose of a groove in the end face of the clunk is to provide a path for the fuel so the clunk doesn't get stuck.
I've never used a length of brass tube in the clunk line, I just use fuel tube but make sure that the length is cut correctly so that the clunk clears the end of the tank. Check this by holding the tank vertically with the neck pointing upwards and shine a light from the opposite side of the tank to show how far down the tank the clunk reaches - it needs about 1/4" clearance.
The purpose of the brass tube in the clunk line is to prevent the clunk ending up at the front of the tank after, say, a heavy landing which can cause fuel starvation on the next flight. If this happens, just hold the model vertically upwards and give it a shake, you should hear the clunk rattle in the tank showing it is free to move. It's never happened to me (well, the heavy landings have!) so I've never felt the need to include brass tube.
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17 minutes ago, toto said:
What's the benefit ?
For this model? Absolutely none.
I often use the Sullivan golden rods in scratch-built models but that is just my personal preference. There are many similar products that do the same job just as well, including the snakes already installed in the Arising Star.
Don't get distracted by well-meaning advice, just concentrate on repairing the the broken bits and fixing the things causing reliability problems. I would be looking closely at the tank setup and testing the engine thoroughly on the ground as a priority.
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If you can get your pinkies in there, the best place for the receiver is on the floor of the fuselage. If you think about it, for the majority of the time your transmitter will be under the fuselage so the signal will have a clear path to the receiver.
Incidentally, "golden rods" are made by Sullivan...
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As mentioned on your other thread, the AR620 and other Spektrum receivers have 2 types of failsafe: smartsafe and preset failsafe. The "default" setting if you use the simple bind process is smartsafe, ie, throttle closes and the other controls hold their position. They do not go to neutral.
Extract from the AR620 manual:
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14 hours ago, toto said:
the throttle went to fully closed again and the aileron, rudder and elevator all stayed neutral as before.
This statement from your failsafe check does not confirm that the controls move to neutral when the tx is switched off.
The AR620 and other Spektrum receivers have 2 failsafe settings: smartsafe and preset failsafe. Smartsafe closes the throttle and holds all other controls in their current position whereas preset failsafe closes the throttle and moves all other controls to positions preset when binding. In either case, it is important to rebind the receiver after all other control settings have been programmed into your transmitter, most importantly if there has been a need to reverse the throttle after the initial bind.
Read the AR620 manual again to find out how to set the 2 different types of failsafe.
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For me as a committee member, one of the key benefits of the BMFA insurance is that it is extended to cover club officers' activities. It also provides member-to-member insurance, either (or both) of these may not be included in other insurance policies such as from a sports council (you'll have to read the small print).
We had a somewhat bloody AGM and subsequent EGM about 20 years ago in my club when we pushed BMFA affiliation through but i certainly feel it was worthwhile.
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Also finished my submission and sent it off.
Many thanks to MattyB for highlighting this to us all and sharing his thoughts, and also thanks to the BMFA for their input.
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6 hours ago, Ron Gray said:
I agree that we should vote against it, but I do think that it will come. My feeling is that it won’t be necessary if you fly from a ‘registered’ club flying site but will be required if you don’t.
I think you're spot on with that comment Ron.
I just hope that the CAA have the sense to make use of the model associations to administer the registration process like currently for models over 7.5kg flying over 400ft or registration of over 25kg models.
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Have you tried cleaning the main jet? We had a similar problem with a strimmer that started and idled happily but wouldn't pick up to full throttle. One of our club members had a look and fixed it by taking out the main jet and cleaning it. Apparently they can suffer from a build up of a varnish-like coating which obviously limits the fuel flow. The main jet was not easily accessible as it was retained by a non-standard bolt so the head needed a slot to be filed in it it to allow removal with a screwdriver.
Worth a look?
Incidentally, I had the same problem with the gas burner in my caravan fridge a few years ago.
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5 hours ago, Geoff S said:
I wonder if the flatpacks are on general sale. It might be an interesting model to fly without all the electronic high technology and just as a simple quick build and robust trainer.
Just look up Flitetest
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Well, that's the last time I believe a weather forecast from John (Michael Fish) Stones, who claimed that Sunday would be the best day of the weekend. It started out ok, a bit overcast and breezy with the occasional sunny patch and was looking good but, around 1pm, you could see the storm clouds all around and the rain soon started. Not heavy and not too long but it remained very windy for the rest of the afternoon. Of course, all we heard all day was how good the weather had been on Saturday...
Still, as always, it was a good day out with the usual friendly welcome from the Don Valley crowd. I managed to maiden the Arrows Hobby L-39 which flew well but seeing Paul Marsh's example made me realise that I need to invest in some 4s packs as mine on 3s was quickly running out of steam in the climb.
This was the scene early on with Paul just landing his Pilatus PC-9.
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I'm sure your new helpers will do a good job - unless they drop a clanger!
Boom, boom (as Basil Brush used to say)!
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Before cutting out formers, check the height and width against the plan and side views of the fuselage.
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Just taken delivery of my L-39. Looks a decent bit of kit but the supplied decal sheet is rather poor so I'm going to try and make some suitable insignia using transfer sheet.
I haven't set up any switching of the gyro, it will be permanently in "dynamic" mode to give a bit a protection from the effect of wind gusts on such a small model.
I'm away for a few days from tomorrow so maiden will have to wait for next weekend at Don Valley. I'll let you know how it goes.
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Planning to be there for at least 1 day if not all 3.
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Goblin was in the Vampire
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Surely it's a Ghost?
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I fly waterplanes. I stand on the bank.
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Oh that's bad news, Ron, hope you recover quickly.
I've booked camping for the weekend and was looking forward to flying the RV-4 there. The forecast seemed pretty good a couple of days ago when I looked, let's hope it changes again before the weekend.
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Fantastic achievement. Well done, Dirk 👍
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Also note that Savox use the same spline fitting as Futaba servos so there are plenty of aftermarket options available.
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Sorry, Adrian, but the rod connectors you are showing in option 2 should not be anywhere near a 50cc model.
They are (just about) adequate for a small foamy but really not not suitable for anything bigger.
On such a large model, I would always go for ball-link connectors using either a turnbuckle rod with LH/RH threads (your option 1) or a conventional threaded rod with a threaded coupler for the ball-link soldered onto the other other end (your option 3). There is also the option of making up a carbon pushrods such as this.
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Looks like a Multiplex Fun Cub.
Sign of the times - funnies * Remember this is a family friendly forum and inappropriate postings will be removed without warning.
in Chit-chat
Posted
Presided over by 4 officials who earn a fraction of their wages and are continually abused by players, managers and supporters for 90 minutes.
Shocking treatment, who would work in that environment every day?