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Saturday 7/7/18

Sat Jul 07, 2018 9:07 pm by Gary M Jones

I was at the field today between 14:00 & 15:00 all on my own , good flying too. There is a dead sheep along the fence line towards the gate from the pits, I saw the farmer so reported this to her. I hope no one had plans for a BBQ Smile .

Farmer …

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New 700 build thread.

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Re: New 700 build thread.

Post by Rich on Tue Jan 04, 2011 5:23 pm

Looks pretty normal now it's got it's clothes on

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Re: New 700 build thread.

Post by Andy Sayle on Tue Jan 04, 2011 5:25 pm

Nice one Danny.

Mine is ready to go now, Just got to set my radio up, and track the blades and figure out where to mount the rev sensor on the CY engine. I'll be using curves to begin methinks....

Give us a shout when you go out to maiden it, I'll make it a double maiden Smile I could do with someone who knows which way up a pitch gauge should be held, to show me again, my memory is failing me!

Andy

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Re: New 700 build thread.

Post by Sam Thomas on Tue Jan 04, 2011 6:19 pm

Nice!!!
Cant wait to see this bird fly!
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Re: New 700 build thread.

Post by Mr Moff on Tue Jan 04, 2011 6:54 pm

Thanks for the kind comments.
Andy have a look at this thread,
http://helifreak.com/showthread.php?p=1917663
It has some good photos and they talk about the sensor mounting.
If you want to set it up before going to the field feel free to pop round.
Double maiden sounds good to me.I'm hoping to maiden it in the next few weeks.
I'm planning on starting it soon in the garden to let the clutch bed in on tickover for a tank because the Quick uk clutch bites early when new.

Danny.
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Re: New 700 build thread.

Post by Mr Moff on Thu Jan 06, 2011 5:41 pm

All finished today about 10 mins ago.
The crank sensor was a slight challenge because it wouldn't pick up the crank when the sensor was about 1mm off the back plate.
This was sorted by moving it in so it's touching the back plate.I also used some hot glue on the little circuit board to protect it from vibrations so it should work fine.

Head setup is as follows,
To get zero degrees at centre stick I took the bellcrank to swash links one turn out each.
Then took the swash to seesaw links out 2 turns.

The transmitter settings are as follows,
Swash mix Aileron = 55%
Elevator = 55%
Pitch = 59%
Pitch value of 59% gave 12 deg top and bottom with no binding.
There is easilly 15 deg possible but I can't see a nitro pulling that much.(A 700E probably could) Very Happy

Pitch curves are as follows,

point 1 2 3 4 5 6 7
Normal mode 28.5% - - 50% - - 100%
-5deg - - 0deg - - +12deg

Idle 1 is the same apart from point 1 being 0% giving a linear curve.

Throttle curve is a linear curve in normal and idle 1 is a 100% flat line curve with the govenor menu starting at 80%.
I use this rev limiter method on my 600LE with fantastic results.It works much better than my 600 NSP does with the multi gov pro.

I'm going to start with 20% expo on aileron and elevator and tweak it from there.

I've been bedding in the quick uk clutch today simply using the starter.
The Align starter turns the engine over fast enough for the clutch to start biting so in between setting it up I've turned it over for around 30 seconds each time and I've done this around 10 times.
A quick note about the OS91HZ motor is that the factory settings out of the box were only about a quarter of a turn out on the mid and high needles. pale
Factory settings are typically around 1.5 turns on both so if you try the OS motor(or any motor) check the needle settings before first startup.

All done,my fingers are shorter than they were.After it's run in and tuned I'll post the final transmitter settings here.woohoo. Razz

Thanks for reading.(this now leads to my next build thread)

Regards.

Danny.
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Re: New 700 build thread.

Post by Guest on Thu Jan 06, 2011 6:03 pm

Danny, I don't know anything about Helis,but yours looks fantastic.I wish I had your talent

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Re: New 700 build thread.

Post by Mark Barnes on Thu Jan 06, 2011 6:27 pm

Nice build Daniel son

M

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Re: New 700 build thread.

Post by Mr Moff on Thu Jan 06, 2011 6:30 pm

Thanks very much guys.
The building part is so addictive.The flying part's good as well though. Very Happy

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Re: New 700 build thread.

Post by Andy Sayle on Fri Jan 07, 2011 2:51 pm

After seeing your chopper last night Danny, I'm thinking that the tail holder bearing upgrade is a good idea. Where did you buy yours from, Fast-lad?

Andy

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Re: New 700 build thread.

Post by Stubbsy on Fri Jan 07, 2011 9:28 pm

Andy Sayle wrote:After seeing your chopper last night Danny,

Was that before or after the pub? Shocked
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Re: New 700 build thread.

Post by Zaidy on Fri Jan 07, 2011 10:33 pm

Razz Razz

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Re: New 700 build thread.

Post by Mr Moff on Sat Jan 08, 2011 12:13 pm

Stubbsy wrote:
Andy Sayle wrote:After seeing your chopper last night Danny,

Was that before or after the pub? Shocked

Ha,very sharp that one stubbsy. Laughing

Andy here's a few links for some shops that have the KDE stuff.
http://www.fast-lad.co.uk/store/at550/600/600n/700n-ptu-kde_direct-performance_tail_upgrade-p-7715.html
http://helidirect.com/kde-direct-series-performance-tail-upgrade-trex-550-600n-600e-700n-700econversion-700e-p-19290.hdx

Fast lad have had them on back order for a few months now so I ended up getting almost all the upgrades from Heli direct and they're in stock at the moment.
They're a great shop to deal with.
Readyheli are also a great shop but they're out of stock at the moment.

Danny.
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Re: New 700 build thread.

Post by Andy Sayle on Sat Jan 08, 2011 2:29 pm

I've done a bit of tinkering, and just ordered a pair of bearings to suit the tail blade grips. Already got some longer bolts, and washers, so I'm going to see if the extra bearing makes as big a difference as I think it will!

Cheers for the links though, will have a look later Wink

Andy

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Re: New 700 build thread.

Post by Mr Moff on Wed Jan 19, 2011 5:52 pm

Finally I managed to maiden the 700 today after Zaide gave me stick for being a shelf queen.
It's absolutely perfect.It needed no trim at all,the tail was perfect and no tracking adjustments needed.
On tank 5 I floored the throttle a couple of times and OMG it's as responsive as the 500.I also did some snappy aggressive turns and these servos are lightening quick.
Yesterday I tried it's first startup in the garden and ran into a problem.
The starter coupling span on the shaft partly due to the massive compression,but when I took it off I noticed the 2 grub screws that hold it onto the shaft had lost the point at the tip.These were stainless steel and when I tried another 2 it did it again. Mad
I then picked up another one and tried to shave off the tip with a screw driver and it came right off.To sum up,don't use stainless grub screws in the starter coupling because they're too soft.The standard ones work better.

Transmitter settings wise I started with,

Expo on cyclic 20%
swash mix is 55 on elevator and aileron,59 pitch.
Gyro gain 70% in the gyro menu which translates to 48% true gain which is perfect.
The rev limiter in the gov menu is 75% with a flat throttle curve 100%.I haven't used the taco yet but the headspeed I would guess is around 1800 ish.

Sorry I haven't got pictures but I was having so much fun flying I never gave it a thought.I'll get some either tomorrow or Friday.

I almost forgot,battery consumption.
5 flights and I just put back in 1869mah out of a 5000mah pack is about 373mah per flight.Not too bad considering it's all on 8 volt with an on board auto glow.

Andy you are going to be hooked. Twisted Evil

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Re: New 700 build thread.

Post by Andy Sayle on Wed Jan 19, 2011 8:06 pm

Buggrit! I drove past the field this afternoon on the way back to work after dropping soem bits off at a machine shop in Rhyl. Saw you and Zaidy there, and a particularly eery fog enveloping the field! You must have got through a fair bit of fuel between you!

It's interesting to see the power consumption per flight though, it is making my single pack of A123 cells looking a bit weedy, especially when I consider I'll be getting about 40 minute run times per tank.......

Andy

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Re: New 700 build thread.

Post by Mr Moff on Thu Jan 20, 2011 12:25 am

I'm not sure how much fuel Zaide went through but I used nearly a gallon.
I forgot to mention my flight times.I'm getting 10 mins before it starts on the header tank so not too bad.

It never occured to me about your flight times verses battery consumption.
I would think that just one of your flights would use similar 1800mah to 5 of my flights.
You can always keep topping up at the field or try a bigger pack.Although after 40 mins of flying your brain might be fried.

Danny.
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Re: New 700 build thread.

Post by Andy Sayle on Thu Jan 20, 2011 9:18 am

Will be fried Danny, not "Might"!

I can't see me going over 20-25 minute flights to be honest. I used to get about 20 minutes out of a pack on my 500, and that was pleeeenty. And as I can charge the A123 packs in about 15 minutes, it's no big deal really Smile And if it is, I'll just add another two cells!

If I can get the little 'un to bed nice and early tonight, I'm going to pop round to Zaid's to get mine setup, ready for a maiden tomorrow if the weather Gods smile down on us, and work isn't mental busy....

Andy

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Re: New 700 build thread.

Post by Zaidy on Thu Jan 20, 2011 10:22 am

if you look closly you can see Danny's heli behind his field box on the left !!



And here is Danny and Tommy. Danny is having a cig to calm his nerves before his first flight Suspect Suspect Suspect


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Re: New 700 build thread.

Post by Mr Moff on Thu Jan 20, 2011 11:34 am

I'd love to have a 20 min flight.I can imagine the brain workout from it.
I'll bring a tacho to the field tomorrow in case you want to check headspeed
Zaide knows about the secret bench tracking technique so you won't need to worry about tracking. pirat
Zaide how do you manage to take photos without anyone noticing? Suspect

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Re: New 700 build thread.

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