Slow G won't climb

[flier1640]

I was finally able to complete Ari's slow stick mods and attempted to test fly today. My problem is the plane broke ground refused to climb and reached the grand altitudwe of two feet. Didn't stay that up that long as in about twenty yards it slowly settled to the ground. Plane is using motor supplied with the kit and sub-micro equipment. Battery is two 1100ma lipos in series. Your help would be greatly appreciated and thanks. :cool:

[iter]

Glad to hear you had the opportunity to finish your kit. It sounds like your model was controllable but underpowered. Please let us know the following:

* What is the model's weight?
* What prop are you using?
* What gearbox came with your Slow Stick?
* Have you balanced the rotors?

Ari.

[flier1640]

* What is the model's weight?Weight 11.5 ounces
* What prop are you using?Prop is a GWS 11/8
* What gearbox came with your Slow Stick?Motor is 350C with 6/1 gearing
* Have you balanced the rotors?Rotors have been balanced

Thanks for asking and I hope this info gives you a clue.
:confused:

[iter]

Thank you for the information. Could you post some photos of your rotor hubs? Also, it would be a great help if you could post a video of the model lifting off.

You could also try with a lighter battery, such as the ETech 450 2S.

If it a new SS you bought specifically for this project, or is it an aiframe you've had for some time?

Ari.

[flier1640]

Have no video camera but will photo rotor assemblies and post. I bought a new slow stick for the project and used the cg information in my setup. Let me know if you could use additional information. :confused: :confused:

[iter]

Photos would help. Also, if you have the time, try to fly it as an airplane and note what the performace is like. Try to see if you can find a lighter battery. If you have a D gearbox around, it will give you a higher gear ratio and more thrust.

Ari.

[iter]

Herb asked me to post these photos because he's having trouble uploading to RCGroups. The photos look great, and lead me to a couple of observations.

First, the paintjob is really cool, but adds weight. So do the beefed-up landing gear and wheels. Keeping your model light is the key to success with the Slow-G.

I was worried that the baldes may have been on backwards. Unfortunately, I can't tell from the photos. Herb, can you take a couple more closeups of the rotor hubs?

There appears to be a metal part under the gearbox. What is it?

Do you have enough elevator throw? How does the model behave with the stock wing on?

Have you tried flying with a smaller battery?

Hope to get you in the air soon,

Ari.

[Dennis P]

My experience with Slo Sticks is that you need to push in a shim between the top aft end of the gearbox and the top of the fuselage to wedge in some downthrust. The stock setup aligns itself to the fuse with the result that downthrust is zero degrees. My 'Stik seemed to like about two degrees downthrust.

I don't know if Ari's design compensates for this but it's worth a look.

[rchopper56]

It appears that the blade direction of rotation is not taking advantage of prop wash. Cannot tell from photos if blades have negative pitch.
Gene

[flier1640]

To answer some of the questions posed: I made sure during construction that the rotors had the blades attached with negative pitch. I will try to take photos that indicate this. With the plane setup as is adding it performs very well without any changes. I was able to lighten the overfall weight. It now scales at ten ounces. I do appreciate your input and will try to incorporate your recomendations. Thanks

[iter]

My experience with Slo Sticks is that you need to push in a shim between the top aft end of the gearbox and the top of the fuselage to wedge in some downthrust. The stock setup aligns itself to the fuse with the result that downthrust is zero degrees. My 'Stik seemed to like about two degrees downthrust.This is very true. We've just had this discussion about InspectorGadget's downthrust, and it seems to have helped his model.

Ari.

[flier1640]

I just returned from attempting to fly the plane and even after getting the overall weight down to an even ten ounces, I was unsuccessful. I had for abour a hundred and fify feet a very fast ground hog. Plane refused to rise and yet the rotors were spinning extremely fast. I will now add some downthrust as suggested and give it a whirl again tomorrow as you folks might have some additional suggestions. Again my thanks.

[mnowell129]

It looks like the tiltback angle is too shallow. Try a shim under the leading edge of the wing.
mickey

[iter]

Mickey, you're the man! I didn't notice how high the tail wheel was. Herb, you can try and bend the tailwheel strut back a bit so that the model has a higher angle of attack (tiltback) when sits on 3 points.

Ari.

[flier1640]

The continuation of my g-stick saga. After applying all the suggestions and still not having any luck I added one additional cell to the battery pack. SHE FLEW, SHE CLIMBED and was easily contollable until I applied full power and started a right hand turn, it was then that the left wing and rotor decided they wanted to fly solo which they did quite well. Unfortunately the rest of the stick didn't fair so well. After the parting of the ways the balance of the stick spun rapidly into the ground, which was concrete and not grass. I guess its back to square one. I want to thank everone for your help and suggestions it has been greatly appreciated.

Flier1640

[iter]

Man, you've really not had good luck with this have you. First, someone throws out the first kit I send you, then you build the replacement kit but you can't make it fly, and then it breaks in mid-air!

IIRC, I included a set of spare blades with your second kit. Let me know what other parts you'll need to rebuild and I'll send them to you.

Ari.

[flier1640]

Thanks Ari. I managed to salvage tme rotor mounts and bearings, so they are fine. What I would need are new wing parts as well as the plywood rotor parts. I have a piece of trailing edge stock that matches the laser cut wood used to impart negative rotor dihedrel which should sufice. I can't tell you how much I do appreciate your offer and help. If you would like a paypal payment let me know how much, and again my thanks. :)

[iter]

A lesser man would have quit long ago! Your parts are on their way to you

Ari.