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Archive for December, 2015
Posted by kiwi_craig | Dec 17, 2015 @ 11:39 PM | 7,606 Views
On the 930! The tail fair screams in FFF and on the V977 lacks hold on sudden pitch changes.

Bit of research, and a rat through the spare parts and ive located two alternative tail blades.

First is off the Blade MSRx. This has more pitch and i'd suggest a better aerodynamic profile

Second is an optional blade offered by Banggood

Black
http://www.banggood.com/Super-CP-WLt...-p-958568.html

Green
http://www.banggood.com/Walkera-Supe...e-p-91193.html

I ordered a green to check it out. Interesting comparisons, going to try the MSRX on the 930 and the super cp "paddle " on the v977

Flight tests to follow !

Note the stock blades seem very prone to cracking, closer inspection there is a step on the bore at the outer edge, of you push them past flush on the motor shaft you are stressing the plastic at the reduced dia on the edge of the blade and that is why they crack !
Posted by kiwi_craig | Dec 17, 2015 @ 11:04 PM | 9,220 Views
The v977 seems pretty demanding on the stock 450 / 25c battery with noticably reduced performance around the 3 1/2 to 4 minute mark and are sucked dry by 5 minutes. 930 is easier as the motor speed is less for the majority of the flight envelope on the FP head

The bigger 520 mah / 30c units on offer seem to offer stronger performance and seem to work really well in the V930 with flight times into the 6 to 7!minute range easy and strong on the 977 to around 5 minutes.

Looking around there are three other aftermarket batteries, these are for the blade 120sr and or the WL v959 and related quads.

Common in the quads are the lectron pro 600 mah/30c, I've been using these in my v959 and they run strong driving 4 brushed motors for 6 to 7 minutes no sweat.

A top rated battery is the turnigy nano-tech 600 mah with a stonking 35 - 70 c rating this battery has the V 977 written all over it !

Other unit is the hyperion 550 / 25c. Price is allot higher and other online tests suggest the nanotech is well superior....... Park that one for now then

Both the turnigy and lectron are thicker than the stocker and 520. If you trim the plastic retainer lugs off the battery mount both will fit but the lectron is very tight and bulges the battery mounts straps , it will likely break these with vibration in use. Relaxing the plastic with an electric heat gun or maybe even soaking and stretching in hot water would be a good idea.

Turnigy is snug but okay once the...Continue Reading
Posted by kiwi_craig | Dec 15, 2015 @ 07:42 PM | 6,807 Views
Finally - Air under rotors

Lots of setup tuning on the head linkages but now got a nice stable hover...... On my pod n boom 071 - 067 brushless i find it to be way more stable with a slug of nose weight, 40 grams, without it tends to rock on the elevator, this was the same..... one of the things about 6G......... will look at a bigger battery to add the weight and gain power as a bonus rather than dead weight.........

Im running the trimmed 070 main blades these are way better than the 067 blades. 070 blade is allot thicker on the leading edge and retains stiffness when trimmed, stock 067 blade has allot more rolled camber shape and flexi when trimmed Aerodynamically the 070 blade is the better of the two.

Trying to fly inside and take photos was not a smart idea smacked it into the ceiling at full throttle...... Ops....... No damage.....

anyways pretty well setup now tirm wise , need to come up with an alternative weight (thin - flat) and it will be ready for initial outdoor flights to explore handling and final tune of the head setup and weight n balance tune.

Hobbymate 2626 has a bucket load of power it seems, cant wait to try it out and give it it's legs

http://www.hobby-wing.com/hobbymate-...ss-motors.html
Posted by kiwi_craig | Dec 13, 2015 @ 03:26 AM | 7,307 Views
After a long break finally back into it. Running a hobbymate 2626, 4200 kv, big pinion, lots of torque in these.

Normally i hard solder all the lighting LEDs in place, this time went for several plugs, what a pain getting those plugs to work fault free..... Hard wire and solder next time.....

Final body fit up, now its detailing time, expect air under the rotors this coming weekend.......
Posted by kiwi_craig | Dec 12, 2015 @ 05:03 AM | 8,165 Views
Been finding a really annoying wobble on initial spin up, after reading remlens posts on the main V977 thread and translating his russian web posts decided to give the 977 a bit of an upgrade

Added the heli factor swash, silicone O-rings and the banggood CF drive shaft along with the hisky drive gear.

http://www.heli-factor.com/shop/inde...products_id=30

The hisky gear is the way to go, stiffer and with a wider tooth set allows allot better mesh.

The CF drive shaft removes shock load and the CF grips the drive gear way better than the steel shaft it seems. CF drive shaft comes with two shorter screws for the top tee fitted from each side rather than forcing the stock screw right through the CF drive shaft

Swash was a nice fit no dramas. Several of the smaller silicone O-rings split on instal lucky i ordered two sets.....

Initial spin up, no more wobble!!, smooth as silk, you beauty. Clearly the stock swash walks around on the drive shaft ?? tried the 930 with stock swash and sure enough the annoying wobble on spin up is still there........

Once mechanically trimmed then a fine tune on the tx, hover was dead smooth, noticably better than the stocker. Whole bird has less buzz vibration going on thats for sure.

Looking foward to out door test flights - if the damn wind ever stops blowing !

Bigger / higher C rating batteries are the next mod, and the 931 blades and uprated tail !
Posted by kiwi_craig | Dec 12, 2015 @ 04:42 AM | 13,008 Views
With the rear dialed its time to sort the front

Went with a 65mm large dia set of rebuildable shocks from hobby-ease. This guy has a big range of shock stuff and these are fully rebuildable and tunable.

http://www.hobbyease.com/silver-alum...5mm-p2863.html

Shocks come with a range of pistons, one, two and three holes and two sets of springs. The lighter red spings would be good for crawling.

Shocks need filling with oil, pretty easy. With the very high leverge ratio a really heavy oil is needed it seems. The single hole pistons feel the best on the bench but will test both single and dual hole versions. Shock has a flexible neoprene bladder in the removable cap head.

Added a plastic shim (3mm plastic stand off nut, drilled to suit the 3mm shock shaft) under the piston to shorten the shock back to match the stock length. At full compression the shock is close to bottoming unlike the stockers so dont be worried that it looks like it has less travel. Works perfect

Had to trim down the alloy offset mount slightly to get the rear of the shock under the body work, few minutes with the dremel - job done. longer 20 mm ss cap screws work perfect along with my shrink wrap spacer to get the 3mm shock bush snug.

the black plastic end section of the shock needs a circular notch trimmed into it to clear the rocker arm unit. small bit in a dremel and easy does it, that way the suspension can go to full droop as designed. plenty of beef on the shock end section to handle this clearancing.

Feels good, good to have decent shock action instead of the overly stiff boing sticks.......... testing to follow.

UPDATE - world fantastic, using 1000cst oil and the single hole pistons

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Posted by kiwi_craig | Dec 12, 2015 @ 04:25 AM | 12,147 Views
The hobby king rear shocks where a huge improvement, the springs are perfect for low speed crawwling as they are quite soft and really allow it to articulate nicely.

Aluminium Front Shock Complete - 1/10 Quanum Vandal 4WD Racing Buggy (2pcs)
PRODUCT ID: 382000151

https://www.hobbyking.com/hobbyking/s...vandal%20front

At higher speeds there was alot of body roll, the front wheel does rolled over nose up wheelies under max power which is cool fun but really the spring rate is to soft. Had to crank in allot of preload in the rear and the front to stop it rolling over under hard turns at speed. After allot of net searching it turns out the HSP 1/8 buggy fronts are an exact match for spring size so decided to give them a go

Added The 1/8 hsp front springs, exact right size, and allot firmer, no need for allot of preload, sits firm now with significantly reduced body roll. Possibly needs a heavier shock oil just to slow it fraction in the damping.

Front springs HSP 94885 Buggy 94886 Truggy

http://www.ebay.com/itm/85801-Front-...-/291530152893

http://www.aliexpress.com/item/85801...339640385.html