Logo 770 is finally done :)

[rcmarty]

I tried out the goblin 770 and didn't like the machine but I liked the size.

Like many I thought the disk load on a stock logo 700 was a touch high also. Makes those stretched out auto's a bit bouncy

After reading another post on HF about the 700/800 combo (700 frame/800 head/boom) It got me thinking of creating a 770 logo.

I made a few changed to the stock logo 700 kit.

- logo 800 mainshaft ( stronger thicker walled shaft , ~5mm lowered head )
- logo 800 boom/TT/tail rod with 50mm trimmed off
- 800 struts
- logo 800 motor with 19t pinion ( target 1950-2000 , maybe 2050 )
- 800 esc
- 90 shore damners
- Lynx 1pc tail clamp
- 115 tails
- SAB 770 3d blades (are sab blades on a logo a felony ? lol )

Got it all setup on VBC.

Planning on running 14s 5000 45c GA packs.

Hoping the extra disk will make auto's easier. I'm thinking closer to an 800 , should be a dream to auto.

Snow is melting like crazy here (yahoo pineapple express) , just need the field to dry up a bit.

Martin

[Mentalic]

Looks nice Martin! I've flown my 700 with 753's and it was very light, with 770's I'd expect some serious auto hang times.

[zguy]

Nice work!

Very interested in hearing:
-Flight reports
-VBar settings
-AUW

[Raptorapture]

Originally Posted by zguy

Nice work!

Very interested in hearing:
-Flight reports
-VBar settings
-AUW

+1 Really interested on impact to weight vs 800 and hang time

[rcmarty]

I'm planning on running 14s 5000's as the 770 blades are a lot closer to 813 than 713 and my collective management isn't that stellar.

5000 will balance better also. I'm running 14s 4400 in the 700 and those packs need to be as far back as possible to get a decent balance. Getting pack fitted into frame and tabbed into the bolts is going to push the pack up closer to the nose and give me a nose heavy machine.

The 14s 5000 45c gens ace packs sit right about center in the battery hole.

Here's a thread on weights :

https://www.helifreak.com/showthread.php?t=616801

While there is some savings to be had , it will give a lower profile look and the smaller 700 canopy is so much easier to keep in one piece than the 800 lid. (rattling around and killing o rings and post covers like crazy)

Only real catch is the blade choices , slim pickins here. SAB of align 780's.

I'm running VBC , I should be able to pull some numbers out of the tx and post up.

I'm expecting the auto's to be hotter than the 800 but much better than a stock 700 setup. Hoping to strike a good balance.

I wanted to try the 753's but the feedback I found on them wasn't all that great. Heavy blade that slows the cyclic down and unless your a collective expert 14s is highly recommended. Bolt up ready on a stock 700 is nice though.

There are some 730's out there but apparently there quite poor. I'm thinking on 12s a good set of 730's would be perfect for the 700.

Martin

[Raptorapture]

Thanks Martin. Appreciate the link. Really confused on the main shaft. You mention it is 5mm shorter and Jays quotes somebody who quotes Mikado as saying the part numbers between 700 and 800 are different but the part is the same and it's just recently been switched to thinner wall. Does that mean the old thicker wall is shorter?

[rcmarty]

The mainshafts are a bit confusing i'll admit.

My 800 is a 2nd shipment to Canada unit and 700 was the first unit.

There has been a recent change in the mainshaft. I believe there all thinner walled like the 700 is. I suspect the 700 drilled spacking has changed a bit also ( tail drive pin to jesus bolt ) .

Last year I crashed my 700 and couldn't figure out why it felt different , I thought it was manufacturing differences in the blades. Turns out it was the mainshaft , I got a newer version with the hole drilled closer to the tail drive pin. Added about 3-4 degrees of pitch.

I don't have a newer 800 tagged shaft here so I can't comment on the spacing or thickness of the wall.

I got mine from rcflightstore.com up here in Canada , Mikado dealer but I'm not sure the turnaround on the 800 shafts , I suspect I got a older version with thicker shaft and dual holes at the top.

700 mainshaft came from Mikado usa so it was fresh stock.


Martin

[galensk]

Nice work !!

[snafu9241]

FYI, there just may be some cyclone 770's in the works.................

[rcmarty]

Sounds good

I was talking to dennis from thehelifarm today and he was hinting the same thing.

I've heard that the cyclones are getting good reviews.

I've got the blackline sab's on there right now. Took a bit of work to get them into the grips.

edge's take on a 12mm root is 11.98mm , SAB's take is about 12.2mm

In all fairness there close and shouldn't matter but those logo 700 grips are good and strong and don't like to flex. I managed to get one blade with spacers almost in place and noticed the gap on the one side of the spacer. I ended up sanding off .1mm off the spacers and re-fitted , still snug with a fit similar to the stock edge's

Ordered up some lipo's tonight. Wanted 4 to make 2 flight packs up but the Canadian dollar has taken a dump and lipo's are up. Managed to get 10% off $195.

I think for pack 2 i'll swipe the logo 800 pack. 3 for 700 , 2 for 770 , 2 for 800 should fill out a day's flying



Martin

[MartinHansson]

Is it an option with The 813 mm blades if you stretch The 700 xxtreme ??

[rcmarty]

Been done before.

I member here used a 700 frame and 800 boom / TT for a short 800 kit.

Saved some weight.

He also used a 800 head with the 813 blades.

IMO the 700 head is tough enough for 813 blades

Martin

[MartinHansson]

Thx. So you don't Think that i need to worry about a boomstrike. I mean The original 800 frame is longer than The 700.

[rcmarty]

Frame looks like it's longer , but isn't much

Stock 700 blade over boom = 6.5" about

stock 800 blade over the boom = 6" about.

800 shaft just a little shorter than the 700 shaft.

I have the shorter (lower) 700 head swinging 770 sab blacklines without any issue. I put the 800 shaft in because I wanted a lower head.

I've experimented with lowered heads in the past on the align heli's. My old 600e was cut so low the bottom of the grip cleared the anti bracket by 1/4 - 1/2" with no issues.

The thread I followed that gave me the confidence to do it did an experiment. He took the shortened trex out and put a piece of cardboard that was 1" lower than the blade, took it out for a flight and no contact with cardboard.

One caveat is that were talking CF blades and dampeners in good condition. Worn dampeners (very very unlikely in XX series after hundreds and hundreds of flights ) and FG / wood ( when have a I seen a wood blade last I couldn't tell you ) all bets are off.

Martin

[MartinHansson]

Hey Martin

Thank you do much for your help. I Will try to se if i Can stretch The 700 xx to 800. My plan was to get a lighter 800 and Then buy a new 700sx with The airframe. Did you buy The 800 canopy? Is that going to be to Big?

[rcmarty]

Canopy is going to be hard , canopy specific to the frame.

IMO way to big.

Its a little tight to get 14s 5000 GA 45c packs in but they will go in with some watching of the canopy while putting on.

800 is very light disk load in the first place. 700 in stock format I didn't like much as it was harder to auto. On my 700 I set it up for 14 degrees pitch so I could have a good poke at the end of the auto - reduces bouncing pounder auto's lol . 250 ish flights later I've getting good at gentle landings , far less pounders (but I still do it more than I like)


The 800 floats and floats like a logo 600se or a logo 6003d on 623's with a sub 1200g pack.

Just remember to add neg to get the 800 to come down , 700 you don't need hardly any neg to get it coming down.

Martin

[mahbouni]

Originally Posted by rcmarty

Stock 700 blade over boom = 6.5" about

stock 800 blade over the boom = 6" about.

800 shaft just a little shorter than the 700 shaft.

So if I put an 800xx main shaft in my 700xx it will lower the head by 1/2 inch?

[rcmarty]

Essentially yes , there will be a few mm here and there to make up for different sized head parts.

Ive been running 800 shaft with 770 blades with no boomstrikes

Martin

[mahbouni]

Did you have to replace or shorten any of the linkage rods?

Also what did you mean the older 800 main shaft is wider? Wouldn't that mean it won't fit the 700's bearings, swash plate and head block?

[rcmarty]

I didn't replace any linkages from the kit.

Old 800 shaft has a thicker wall not wider.

Martin