Synergy N7, The 'BIG' build thread.

[Rctintin]

To date, I have had 15 flights now with the N7, and obviously the first few were with a pretty rich smokey engine. I've started to lean her back a bit more now, and yesterday was the first time I saw just how much power that OS 105 HZ-R has got!! OK its not electric power, nor will it ever be, but I spent alot of time in 2013 flying over 250 flights on my Synergy N5c with a YS56 in it. This was to teach me more collective skills, and I think this is paying off because the N7 is very quick and power loops, hurricanes etc very well with very little motor or HS bogging.

I am using Optifuel 30slv fuel, and I have the additional .2mm shim in the head for this high nitro fuel. I have chosen this route because on the YS56 needing 30%, and I dont want to have to buy 2 types of fuel for both machines. The OS 105 would ordinarily use 20% fuel.

The N7 feels very light in the air (I must weigh it and post what it is) but it's alot lighter than electric 700 size machines. I have already had 2 forced Auto's because I have been enjoying flying it so much that I have run out of fuel!! It floats very well on its Rail 696 main blades. I have my V-Bar bank switching set with 3 steps in the agility setting, and I like it best at 90. I'll leave the 110 setting for Mr Steve G to play with when I head back up to the northern lads soon!!

To summarise, I am very very impressed with this model, with only a couple of errors in the kit, which I think is really good for a first run production kit. This machine I believe will re define the 700 nitro class, and I'm sure you all will be seeing a fair few of these models around the flyin's this summer.

I'll add more update to this thread as I get more flights in, and if any of you with the N7 want to add your thoughts, please do.

I'll be back soon with the E7se build thread, and also the TT conversion of the N5c build thread.

[Rctintin]

[QUOTE=jonesheli;1105039]Rob

Notice you're using a 451 on throttle, you running that on HV with rest of the system with no issues?[/QUOTE]

Yes mate, as I have been in my TDR, N5c and both Goblins. Even though Futaba dont say its HV, Robbe do. They have been totally fine straight of 2s Lipo

[Boggy]

Incredibly detailed thread Rob. And so good to see a nitro model getting the limelight it deserves :)

[Rctintin]

Thank you Ron, its been a fantastic pleasure to build, and something that I knew I had to have the very first time I saw a picture of the original prototype that was unveiled at IRCHA last summer.

[Sesame]

Fantastic work as ever my friend. well done Rob, very interesting thread.

[Rctintin]

Something that has become apparent in the past, but has really shone through on this N7 is the extremely efficient Futaba HV servo's power wise. I opted for the Rx pack that I have because its what Matt Botos has used throughout development as the CofG is spot on with it.

On the maiden day, I flew 6 tanks, as was surprised to see 71% left in the Rx pack. Bare in mind that I do not power down when refuelling, It's just land, kill motor, refuel, start motor, fly.

[URL=http://s1008.photobucket.com/user/Rctintin/media/343_zps9b46a200.jpg.html][IMG]http://i1008.photobucket.com/albums/af210/Rctintin/343_zps9b46a200.jpg[/IMG][/URL]

On the following weekend, I went and flew another 6 tanks (6mins each flight) without recharging the Rx pack, and the capacity was now at 39%!!

Not bad eh!! I could go and fly 2 gallons of fuel in one day without a single recharge!! Thats one of the biggest bonus's of nitro.

[ROSSCO]

[B]UPDATE REGARDING N7 BOOM PINNING:[/B]
Just to clarify on the boom pinning method on the N7, on behalf of Rob i have asked Matt what the prefered pinning method is for the N7 and he says that although he doesn't advise pinning the boom at the rear boom clamp position he has yet to see a failure from doing so.

Matt and the team have found that the two boom clamps provide more than adequte clamping pressure, but if pinning is prefered then securing with a M3x6 button head bolt at the front boom clamp is the preffered method. To do this the boom clamps will have to be removed from the main mechanics and the boom drilled, pinned and pre installed in them prior to the assembly being refitted in the main mechanics.

Hope this helps,
Ross

[Rctintin]

Thanks for clarifying that Ross, at least it clears any confusion. I was happy about the way mine was done purely based on other machines from other manufacturers having their booms pinned at the back clamp.

So basically, you can pin in either clamp, but the front is the preferred option.

[cyprusflyer]

Nice thread Rob and great photos, wish I was back in UK with all the bad weather and time to take all those photos lol.
Still having OS105 probs over here, have a few options including swapping out for a YS Tareq 91, slowly slowly, still have my replacement TDR to finish so lots going on. Keep the post coming watching with interest.

[Richardmid1]

Very nice build Rob! :applause: Hopefully flying mine at the weekend!

[Varelco]

I would of thought pinning the boom by the rear clamp wouldn't be an issue. Its been proven by all the manufacturers who do it. Not to mention the base of the boom is going to be the area which takes the most stress due to leverage, all the thrust is coming from the end of boom. Its a bit like bending a ruler on a desk I suppose, you push the tip of the ruler but it will break closest to the table.

[Rctintin]

Yeah, I see no issue at all. Just look at any vid of Dunkan Bossion flying the Gaui X7 and any vid of Duncan O flying the Align 700e and Nick Maxwell spanking the E700.... All pinned at the rear end of the front clamp.

[Shauny]

Awesome build thread, great detal. The quality of the Synergy looks absolute top notch too. I've picked up a few helpful tips off this too. Thanks :anonymous:

[Toolman]

A couple of thoughts on the hole for boom pinning,
In full size aviation the Std repair for cracks in aluminium is to (guess what) drill a hole at the end of the crack to stop it spreading!
Another point is that the UP/Down direction is where the boom is stiffest due to the boom supports, funny really as the loads from the tail rotor in flight are sideways!
That said vibes in a Heli particularly a Nitro aren't to be underestimated.

Tim,

[liamm =D]

well finally managed to get my n7 :D they are a hell of a lot of money but from the little bit that i have built its very very nice :P

got to the main gear and it is machined very well and look's very strong :D

oh and when i got the canopy out of the box it looks a lot nicer in person than it does on youtube or the pics

only got the main frame built so far but already very impressed and think its worth the money but time will tell when its time to fly it :D