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HelicopterOff Topics Planes and Jets › Building a beat up Tower Hobbies 40 for my Dad.
10-09-2017 10:41 PM  12 days agoPost 1
InvertedDude

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USA

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Yes! My 63 year old dad finally said he want to fly it!

Tower Hobbies 40 trainer.

My problem is mounting a Align 600XL motor.

I need something to hold the motor in place.

Any solutions?

I could just install the Hyper 50 engine. Want to try electric first.

6s 5000mah 45c 75amp esc

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10-09-2017 10:53 PM  12 days agoPost 2
spaceman spiff

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Tucson

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Tower hobbies sells a wrap-around metal mount that probably will work. It makes use of the 4 mounting screws on the front. The KV rating 1600 (RPM/V) seems a little (or a lot) high for that application, but a modest sized prop - 4 pitch might do nicely.

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10-09-2017 11:10 PM  12 days agoPost 3
nappyroots2182

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Moline, il

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That kv is going to need pretty much a 4in prop or maybe drop down to 3or4s. 800kv on 4s im swinging a 11x7 prop

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10-09-2017 11:21 PM  12 days agoPost 4
InvertedDude

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USA

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Spaceman Spiff

https://www.towerhobbies.com/cgi-bi...?&I=LXLCL4&P=ML

https://www.towerhobbies.com/cgi-bi...?&I=LXLCL5&P=ML

https://www.towerhobbies.com/cgi-bi...?&I=LXMVU6&P=ML

My motor is 44MM diameter and 65mm length sized- BL Bolt holes are 25mmx25mm.

Motor mount holes on plank firewall is 30MM (W) x 40mm (D)

Also, I have the front wheel too to support.

Looking at those, I am not 100% sure...

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10-09-2017 11:22 PM  12 days agoPost 5
InvertedDude

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USA

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nappyroots2182

I have an 880kv motor to use if that is needed?

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10-09-2017 11:41 PM  12 days agoPost 6
spaceman spiff

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Tucson

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Good point on Landing gear. Perhaps squeeze in a couple pillow block mounts for it? I made a custom mounting block for a 60 size Stick that I converted to electric. Simple plastic block drilled for landing gear and tapped for the usual out-runner motor mounts.

What 880KV do you have?

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10-09-2017 11:45 PM  12 days agoPost 7
InvertedDude

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USA

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Spaceman Spiff

https://hobbyking.com/en_us/turnigy...?___store=en_us

Currently installed in Trex 600ESP for low Head speed and max blade pitch.

Can I have a picture of your 60 Stick sized electric mount pls?

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10-09-2017 11:57 PM  12 days agoPost 8
spaceman spiff

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Tucson

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This is probably a good-ish choice:

http://www.valuehobby.com/power-sys...-outrunner.html

The weight and power is better matched to that plane, and it is under 40$

It is about 5 ounces lighter than the Turnigy and draws a lot less current.

I'll post a pic of the mount I made a little later.

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10-10-2017 12:02 AM  12 days agoPost 9
InvertedDude

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USA

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spaceman spiff

That has everything I need at a good price. What about motor extension to clear the sides?

Longer screws and plastic rod inserts to extend the motor and prop to clear the frames sides?

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10-10-2017 12:47 AM  12 days agoPost 10
spaceman spiff

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Tucson

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Here is the mount i made for my 60 size stick. I used an eflight 46 motor on it. Much lighter than the 60 motor, and ballanced quite nicely without putting any lead in the tail. Unlimited vertical performance too. Straight up without struggling.

The firewall to the back of the prop worked out to be around 3 3/8 inch.

Nothing wrong with triming the plane to fit if need be.

The 32 is slightly smaller motor that still would likely do the trick and keep it light. Worth a closer look. Past a certain point it is much better to have it be light than powerfull.

http://www.valuehobby.com/power-sys...-g32-800kv.html

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10-10-2017 01:48 AM  12 days agoPost 11
InvertedDude

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USA

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spaceman spiff

That picture made everything click in place. I see what you did and yours is a better solution.

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10-10-2017 03:14 AM  12 days agoPost 12
spaceman spiff

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Tucson

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Have a look at the reviews of the G32 motor. Folks are using it in 46 and 50 sized planes and loving it...

If you use the G32 motor be aware that the shaft that extends thru the static side of that motor is probably not intended to allow you to just loosten the set screws and slide it thru like the eflight and others. I made that mistake on a smaller one and ended up screwing up the motor. Just cut off the excess shaft with a dremel so it doesn't interfere with your landing gear.

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10-16-2017 06:45 PM  6 days agoPost 13
InvertedDude

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USA

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New issue on landing approach

I faced a new problem trying to land the plane in a certain area.

This tower hobbies 40 plane loves to glide! We talking about engine idle producing enough thrust to make landing a pain!

Swapped the engine out with reliable low low idle....still glides!

Should I add a considerable amount of weight to force the plane to lose speed quickly for landing approach?

It easily take 300 to 400 yards to land this sucker!

WOW! This plane doesn't want to land!

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10-16-2017 08:52 PM  5 days agoPost 14
spaceman spiff

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Tucson

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If it has 2 servos on alieron you can program them to go up. Flaperon function ( Reverse flap ) .

An alternative would be to add drag. Perforated plates like they had on WW2 dive bombers...

Prop can make a noticable difference too. What engine and prop are you using?

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10-16-2017 08:55 PM  5 days agoPost 15
InvertedDude

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USA

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spaceman spiff

Only one servo for ailerons!

Adding custom controls require a hack up job and re-balance.

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10-16-2017 09:18 PM  5 days agoPost 16
w8qz

rrVeteran

Grand Rapids, MI - USA

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Gotta learn to slip / crab on landing - cross controlled, it'll come down faster. Keep a little throttle on (typically). The trick is to get the right amount of rudder vs. ailerons, since most trainers roll-couple strongly with rudder inputs.
In my experience (on 1 airplane) the flaperon method caused more problems than it solved.

"The helicopter is much easier to design than the aeroplane, but is worthless when done."

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10-16-2017 09:42 PM  5 days agoPost 17
InvertedDude

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USA

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w8qz

Watch at YouTube

You mean this to bleed off energy?

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10-16-2017 10:07 PM  5 days agoPost 18
spaceman spiff

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Tucson

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For fun flys folks will attach a paper cup and popcycle stick to the top of the wing for bomb drops. Ceates a noticable amount of drag.... Pretty sure you could improvise some variation of a simple drag/spoiler to get what you are looking for.

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