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05-02-2004 08:58 PM  13 years agoPost 1
DangerousDick

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Cheshire, England

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Finally got hold of a Zoom on Friday from Revolution up here in Altrincham.

Decided to get the whole lot as I needed to make sure it would fly 'out of the box' and didn't have all the bits hanging around.

The manual shows the Gyro mounted the wrong way round (for me anyhow) and would've resulted in some interesting pirouetting had I not checked for control direction. The brass gear at the back end of the boom wasn't firmly attched to the shaft either allowing me to turn the main gear and hold the tail blades still so I had to remove it, score the inside and re-fit it - fine now. Those two bits were the only negatives on building the thing up on Friday night - time for a quick test out on the driveway before the light failed completely .

Took it all to the fly-in at Goole and flew in all the wind on Saturday - VERY IMPRESSED with the results . Then saw another one flying upside down behind me so I tried that one aswell - now that stock gyro Protech sell you is perfectly fine for 'sports' flying and all the time the nose is pointed forward the tail behaves impeccably but trying a loop (with the intention of holding at the top) resulted in headspeed drop off with full cyclic application and the tail wildly spinning around completing a manouvre I don't think has a name and isn't very pretty either .

Tried with a roll up high instead and it was better as forward speed was maintained, held inverted for a while and pulled around in a reversal to come back. This was the ultimate test for me as if the model wouldn't fly upside down it would've hit the shelves of E-Bay tonight .

Flew once more in all the wind on Saturday and was really impressed by the way the model coped. Sunday was a completely different experience with very hot temperatures and no wind at all. Started it up at eight in the morning and flew around nicely for a while without any problems but on throwing it around a little coming around in a turn the thing started shaking wildly and I could see the tracking had completely gone. 'Nursed' it back to my feet and landed it to find one of the washout arms had come unscrewed from the head resulting in pitch adjustment to only one blade - a screwdriver fixed that one and it was back in the air to 'finish off' the pack . I've put a dab of super-glue on the thread tonight in the workshop to stop that one from happening again.

I've flown it now with the LiPO 1400 3s pack five times so from what I've been hearing/reading I only have a couple more flights before the motor decides to quit on me so I'm looking out for the best brushless combi to go with. I got hold of a couple of 2 cell Kokam 1500's today to make up a 4 cell pack for it as that was the setup being used in the video's (I believe ?) so I don't think I'll be seeing much more of that little motor when the 14v hits it .

I really like the way this little bird flies around and have found it better to get back to the hover when landing and hit throttle hold about a foot off the ground - that way the tail stops so I won't be risking any damage in the rough ground. Haven't tried a full-on auto yet as I don't know where I'm going to get the parts for it yet but for the money I don't think you can do much better?

So, British weather - OK.
3D - When I learn to do it properly I'll let you know but basic manouvres look simple enough. I did notice the other Zoom flying had the Piccolo Pro 3D paddles fitted to the flybar so that might be another 'upgrade' to increase the cyclic effectiveness.

Don't think I've missed anything out and appologies for rambling (or boasting that I've managed to get my hands on one of these little gems) but thought I'd share my experiences with it so far. I'll update when the motor finally quits and I get the brushless kit .

Cheers
Richard.

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05-02-2004 09:16 PM  13 years agoPost 2
mustfixx

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U.S.

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How is the brushed ESC set up? Which ESC are you using?

Thanks

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05-02-2004 09:22 PM  13 years agoPost 3
aarinsingh

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Thompson, MB

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Finnally a good report on how the bird handles. Thanks and keep us posted

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05-02-2004 09:36 PM  13 years agoPost 4
DangerousDick

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Cheshire, England

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Protech ESC (which handles upto 15v so it says on the sticker) is soldered directly to the motor - forgot to mention that one but I hate using connectors in that area. I'm pretty sure it's rated at 20A, can say what the BEC handles though.

I just got my hands on a JR662 radio last week so I set the Zoom up on that, left the normal 'curve' at 0, 50, and 100 and set the idle up at 60 in the middle and 100 at both ends. Only a handful of flights so far but seems to work well with the 3s pack which came with it. I did start with 50 in the middle of the idle-up but found the headspeed dropped too far at mid stick.

Would be happier with an ESC which cuts out at the 'safe' point of the LiPO pack but was told today that as long as I listen to the motor and land as soon as it starts to slow then I should be OK. I should also be checking the V on the pack after use, but was too excited at the weekend to get the meter out - will have to start logging times / V's left to make sure I'm get the most out of these things, this is the first LiPO electric experience for me .

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05-02-2004 11:33 PM  13 years agoPost 5
r1gga

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Palo Alto, CA

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awrite giggedy giggedy,
If the weather in Cheshire was anything like it was here on saturday then I should have no problems (quite windy). Mine will arrive on tuesday after the bank holiday, but will live in its box for two weeks (while the credit card recovers and my birthday comes around). Its gunna be tuff keeping it boxed, but I am gunna break in my new JR 26x with my Hummingbird FP. Oh Dick I would appreciate some english wind vids if your up for it! And for spares in UK try rotorsport.co.uk (Herefordshire). Oh also I just ordred a pinhole wireless colour video camera for cockpit view videos!! http://stores.ebay.co.uk/id=110894897&ssPageName=L2
Ruddy cheap they are!

r1gga

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05-03-2004 01:37 PM  13 years agoPost 6
DangerousDick

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Cheshire, England

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sorry, no video footage from Saturday as far as I know but the windsock was bending the pole and the gazebo Chris kindly brought with him was only just hanging on to the rigging.

Just been checking mine over thoroughly after the weekends flying and unfortunately the superglue I put on the pitch collar to stop the screws from loosening in flight had somehow got inbetween the collar and main-shaft. Luckily I managed to free it up and with a little movement and some thin oil it's now sliding up and down like it should. Whilst all this was happening the pitch bearing at the bottom where the servo rocker is had come out of its plastic holder (most likely due to the excessive binding up above) so I scored that and applied some SG to make it more secure.

I tried the 2 x 2s Kokams I picked up from Goole in for size but can't see any easy way to carry them on the model as yet, looks like a carbon plate will have to be made up to support them a little further forward as they are too tall to fit into the slot available. I'll stay with the 3s for now till the brushless motor arrives.

Made up a little 'blade carrier' out of some 3/8" balsa and padded out the box a bit so I can carry the whole thing around with a little protection to prevent 'hanger rash'.

I'll be looking out for some carbon rod for the tail linkage tomorrow so I can get rid of the flimsy wire on at the moment and, if I can find any, some Piccolo Pro paddles.

Two weeks is a whole long time to wait for something this good - see if you can sneek the goods out of the box and re-seal it for wrapping up later

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05-07-2004 10:26 PM  13 years agoPost 7
DangerousDick

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Cheshire, England

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Cobbled up the carbon tail pushrod today and took the Zoom out for a spin tonight - was lovely weather all day and I had to wait till it got cold & windy - Doh .

Made an improvement but tail still not as secure as I'd like it to be.

Managed to get the head tached tonight @ 2,020rpm in idle-up. Still running the stock motor and the stock pack, both seem fine but I would like that little bit more if I could get it . I'm running a 100-60-100 throttle 'curve' and 0-50-100 (-7,0,+7) pitch.

I also setup the 'normal' to give me around -3 at the bottom to try some practise auto-rotations. It comes down lovely, not too quick and seems to hold enough energy till the end. Great to see that tail rotor stop while it's on its way down .
Did manage to try a couple 'for real' with the hold button and landed OK but there is so little left at the bottom compared with my bigger toys. Advantage is that the thing is so small and light, the odd 'heavy' landing doesn't cause any damage .

Gotta get me a brushless motor and maybe some carbon blades so I can really wring this little baby out .

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05-12-2004 07:00 PM  13 years agoPost 8
DangerousDick

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Cheshire, England

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No brushless yet, but did manage to get hold of a bearing to go inside the boom.

Didn't check first, just thought I'd get hold of one and then see what was inside - sure enough it was a bushing. From the price of the bearing I'm not surprised it was missing in the first place £4.94 .

I got it from Arrow Engineeing in Manchester, the part no is 693ZZ, description is just 'bearing'. You can ring them on 0161 737 6969. I'm sure someone will come up with a cheaper alternative but these guys are really helpful and have them on the shelf .

Think I've overdone the tightening of the four bolts which clamp the boom onto the body though, they seem to be 'spinning' - oops might have to add some washers and be less of a brute in future .

Cheers
Richard.

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05-12-2004 11:02 PM  13 years agoPost 9
Si_B

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West Sussex

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Richard,

Great to hear your comments on the zoom. I got mine from Belgium (it's actually a Dolphine...but who cares eh !!), and got three of those Kokams cells free with the kit as well as the standard pack. I was just wondering how you went about making the pack up from these cells ??. There are no tabs on them, so I can't see how you can solder without damaging the cells. Do I need any special tabs to connect them together or is it just insulated wire.

Apologies if this has been covered before, but I was expecting a pack I could use and not three separate cells. Seems a shame not to use them.

I'm currently putting all the bits into mine and will definitely check some of the things you mentioned. Gone straight for the brushless hacker motor and ESC so it should rock straight form the box.

Regards,

Simon

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05-12-2004 11:11 PM  13 years agoPost 10
DangerousDick

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Cheshire, England

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Hi Simon,

Firstly be very careful with those LiPO cells if you're going to work on them in any way - you don't want to short them babies out .

The Kokams I bought were soldered up in twos with a board at the top where the connectors were. I've just taken them out of the shrink-wrap they were in, put a piece of balsa inbetween them, stuck 'em together with a series board to connect them together and re-shrinkwraped them as 4s1p configuration.

If you've got no tabs, or any board at the end of each cell than I can't see any way of using them, I'd be pretty tempted to take them apart to a degree to see if I could make some use but knowing the little I do about this technology I wouldn't recommend it to anyone. The safest way to handle these cells is the way they come, in the packet.

What Hacker have you got for it?
Richard.

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05-12-2004 11:29 PM  13 years agoPost 11
mdttb

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Anaheim, Calif USA

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Richard

I replaced the screws in the tail gear case with some (4) small servo mounting screws I had. Can't rememebr what servos they came with. They're longer a tad bigger and go all the way through the case. If I can find some small screws,washers with nuts I'll replace what I have now but in the mean time it works just fine.

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05-13-2004 08:44 AM  13 years agoPost 12
Si_B

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West Sussex

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Richard,

Thanks for that. Sounds like I'd be better off just leaving them alone. Bit of a shame though. These were supposed to be the latest type of Lipo cells. They look just like standard cylindrical nicad cells except for being a bit slimmer. I don't fancy taking them apart, I get twitchty everytime I charge my pack Lipo for the Eolo

Will get back to you on the type of hacker motor. It's a tiny looking thing compared to the stock motor. My friend already has his installed and it goes better on the standard pack rather than the 14v set up. I'm just waiting for the 9 tooth pinion to arrive.

Thanks for the help.

Simon

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05-17-2004 07:53 PM  13 years agoPost 13
DangerousDick

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Cheshire, England

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4 cells - Oh my god !!!

Finally got around to trying the 2 x 2s1p Kokam packs I picked up the other week - wired into a 4s1p.

My mate tried to tach the head but it was just going too fast - a totally different helicopter to fly it was awsome .

I was chucking it around all over the place with a massive silly grin all over my face just a pitty that stock gyro can't keep up, it was bad before but with the additional power it was just a joke! Tried to get a decent inverted hover pic but every time I slowed it up in front of us it just span around and was off again we did manage one though :

I know the motor isn't going to last long and I couldn't get anywhere near it for a good few minutes after the flight but boy was it worth it .

All I need to do now is get hold of a decent gyro (will try and pick up a CSM560) and the HiMAX 2025 and I'll be putting all the other models in winter wraps for the summer .

Cheers
Richard.

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05-17-2004 11:05 PM  13 years agoPost 14
Si_B

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West Sussex

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Richard,

Why did you have to post pictures like that !!!. Been trying really hard not to start building mine yet (loads of other jobs to do). Got no choice now !!!

Those motor details I promised Hacker B20 - 15L (3700rpm/V) on a 9 tooth pinion. Like I said, I've already seen a mates with one of these fitted and it's sweet to say the least. Hard to believe such a small motor can produce so much power.

Great pictures

Simon

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05-18-2004 02:44 AM  13 years agoPost 15
r1gga

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Palo Alto, CA

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Nice Pics!!!

Gotta train my camera man some more (oh and get a better pilot ) before I can get those sort of shots. Nice work. Oh my heli is staying boxed until the 27th, so it is ready for my brithday (28th)! I have will power and my HB to keep me away from it!

r1gga

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05-18-2004 08:52 AM  13 years agoPost 16
Mike_Y

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South Wales, UK

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Great pictures Richard, gives us lesser mortals something to aim for

Mike_Y

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05-18-2004 06:22 PM  13 years agoPost 17
Martin

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Manchester England

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DangerousDick.
Just to let you know Revolution in Altrincham have some Fibre Glass and Carbon main blades in stock plus upgraded main shafts and are today in the process of doing some carbon trick bits. Should be available at Sandown this weekend.

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05-18-2004 09:21 PM  13 years agoPost 18
DangerousDick

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Cheshire, England

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Thanks Martin, got the price on those blades on Monday and got a bit of a shok .

Think I'll wait till I get the brushless then see what kind of headspeed I can get up to with some performance and try and balance the two. Will probably end up with some soon though .

Are you still running the original paddles? I'm in Birmingham tomorrow so might see if I can pick up some Picc Pro ones to try out.

Cheers
Richard.

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05-19-2004 12:08 AM  13 years agoPost 19
Martin

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Manchester England

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Yes completely stock machine bar the carbon blades and some carbon tail fins I made (see Gallery)Oh and a rudder push rod. Could you let me know how you have your machine set up. ie pitch, throttle and pitch curves etc. I`m still playing with mine and finding it a little twitchy. I think I could do with a tacho to see what head speed I`ve got. I`m only at the hovering stage but enjoying the machine.

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05-19-2004 08:40 PM  13 years agoPost 20
DangerousDick

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Cheshire, England

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Throttle : Normal 0 - 50 - 100, Stunt 100 - 60 - 100

Pitch : Normal 30 - 50 - 100, Stunt 0 - 50 - 100.

Haven't got around to measuring the pitch, but pretty sure I've got zero in the middle of the stick .

Will probably set it all up on my 10X soon, but as I just got hold of a 662 I thought I'd make use of that. Might have to to get the full advantage of the brushless controller anyway?

No doubt I'll come out of Revolution with a nice new set of carbons next time I darken their doorstep .

Cheers
Richard.

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Helicopter
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Elec-Helicopters New or Limited Activity
Zoom › Yippee - I got one ;)
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