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What to put my Laser 80 in?

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LYKA05/07/2016 20:19:40
89 forum posts

Trying to find a scale/semi scale model for my Laser 80?.Thought about the Hanger 9 Piper Cub 40 (80" wingspan )but it seems that the Laser 80 would be to much for Hanger 9 Piper Cub so I now thinking about the Seagull AT Texan 75 (Harvard ) Anybody had the Seagull Texan 75 ,like to know what it fly's like and would the Laser 80 be OK in this model ?I never seem to get it right .I either have a model with to much power or not enough ,one day I will get it right I hope!

Rich too05/07/2016 20:37:37
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3060 forum posts
1070 photos

https://www.stevewebb.co.uk/index.php?pid=A183&area=Aircraft

yes

Although they're out of stock.

 

Edited By Rich2 on 05/07/2016 20:38:00

Edited By Rich2 on 05/07/2016 20:40:01

Jon - Laser Engines05/07/2016 20:44:51
5621 forum posts
271 photos

Are you looking to build or for an ARTF?

Rocker05/07/2016 20:51:54
351 forum posts

ARTF, you have not seen my models when I try to build them ,a 2 year old would make a better job than me, it is embarrassing !!

Former Member06/07/2016 07:00:47

[This posting has been removed]

Jon - Laser Engines06/07/2016 08:51:09
5621 forum posts
271 photos

I agree, the more you build the better it gets!

If building is not on the cards though the 80 should be fine in the Texan. It wont be unlimited in terms of performance but should be totally scale. Just make sure you remember to either move the fuel tank or mount the engine such that the carby is in line with the tank. People often forget this basic installation rule and then have trouble

Edited By Jon Harper - Laser Engines on 06/07/2016 08:52:13

Rich too06/07/2016 12:40:25
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3060 forum posts
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Buy the H9 Cub you wanted in the first place. yes

Jon - Laser Engines06/07/2016 12:43:26
5621 forum posts
271 photos

The 80 will be far too big for the piper cub. A friend has a similar model from another brand and our 70 is too much for it!

Rich too06/07/2016 12:47:53
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3060 forum posts
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I disagree Jon, it was designed for 80's.

**LINK**

I fly a similar sized model with a Zenoah 23 and it flies great. wink

Jon - Laser Engines06/07/2016 13:06:14
5621 forum posts
271 photos

I have owned/flown 3 models of the same type and size. A 52-60 4 stroke is more than enough for scale performance. The kit itself suggests 56-82 so to say it was designed for an 80 is a bit of a stretch. 56-82 also covers the saito range and as Horizon are saito distributors thats why they are listed but the 82 is way too much. The model only weighs 6lbs. Unless yours weighs a ton a Z23 is pretty mad and i really would not recommend it. That sort of power is usually more than enough for a 100+ inch cub of more than twice the weight of this one.

Most artf manufacturers get their engine recommendations wrong on models like this. The seagull Gypsy Moth suggests up to a 120 for a 72 inch biplane. This is total madness and i recommend the 80 for that model and the reports from customers have confirmed that the 80 was the right choice with scale flight at 1/2 throttle being possible.

Given all i know about the performance of the Laser 80 and this specific model i would say with 100% certainty that it is too powerful and is the wrong engine for the model. The Texan would be a far better bet

 

Edited By Jon Harper - Laser Engines on 06/07/2016 13:07:00

Rich too06/07/2016 14:05:44
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"The kit itself suggests 56-82 so to say it was designed for an 80 is a bit of a stretch" that's a bit of a contradiction wink

we can agree to disagree

Jon - Laser Engines06/07/2016 16:25:05
5621 forum posts
271 photos

A model designed for a singular engine size would only list that size and not give a range

trebor06/07/2016 17:39:42
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1939 forum posts
216 photos

Hanger 9 cub. Mines got a saito 82 with 13 X 6 prop and 5 oz of weight up front as far as it will go along with the battery. Stick a smaller engine in and you'll need a bigger lump of lead.

Ps. It's slightly modified but not by much. 

Pps. Just noticed there is two threads now. 

Edited By trebor on 06/07/2016 17:43:49

Edited By trebor on 06/07/2016 18:05:10

Rich too06/07/2016 18:17:51
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3060 forum posts
1070 photos
Posted by Jon Harper - Laser Engines on 06/07/2016 16:25:05:

A model designed for a singular engine size would only list that size and not give a range

I'm not biting wink

Rich too06/07/2016 18:19:51
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3060 forum posts
1070 photos
Posted by trebor on 06/07/2016 17:39:42:

Hanger 9 cub. Mines got a saito 82 with 13 X 6 prop and 5 oz of weight up front as far as it will go along with the battery. Stick a smaller engine in and you'll need a bigger lump of lead.

Ps. It's slightly modified but not by much.

Pps. Just noticed there is two threads now.

Edited By trebor on 06/07/2016 17:43:49

Edited By trebor on 06/07/2016 18:05:10

Yes, that's a common problem. My H9 .60 P47 has a DLE 20 up front and still needed lead to balance! Rather have useful weight.

Denis Watkins06/07/2016 18:20:06
4632 forum posts
129 photos

Now, if Hanger 9 remains the choice, The Piper Pawnee would be able to carry the huge 80 lump, and would fly well at nearly 1000 watts, as it would come out at 9lbs with this powerplant

Denis Watkins06/07/2016 18:24:44
4632 forum posts
129 photos

At the construction stage, or assembly stage with ARTF, always consider servo placement within the fuselage, does not have to be in the rearward spaces that the manufacturer provides. Servos can go forward and can save the amount of weights added to obtain correct c of g

Martin Harris06/07/2016 19:32:26
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9502 forum posts
256 photos

Put big wheels on it and call it a Tundra Cub!

While the 80 is obviously far more than required, Super Cubs often have 180 hp engines fitted and it's essentially the same basic airframe as the original J3 which first flew on 37 hp and classically with a 65 hp engine - so overpowering is a bona fide scale option...you can always throttle back, and low revs will make it more realistic anyway!

Edited By Martin Harris on 06/07/2016 19:34:30

Scott Edwards 206/07/2016 20:28:34
225 forum posts
97 photos
I know you said scale/semi scale, but I have my Laser 80 in an ARTF WotsWot and I'm loving it ! Fits in the car in one piece, and is perfectly powered and balanced by the 80. If you fancy a bipe these really are sorted. Only minor negative is that the cowl isn't quite long enough and there is a 5mm gap between cowl and spinner.
Rich too07/07/2016 06:40:26
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3060 forum posts
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Posted by Denis Watkins on 06/07/2016 18:24:44:

At the construction stage, or assembly stage with ARTF, always consider servo placement within the fuselage, does not have to be in the rearward spaces that the manufacturer provides. Servos can go forward and can save the amount of weights added to obtain correct c of g

Yes, good point. I must admit that I am lazy and follow the instructions, but I should do more planning in this regard when starting construction. My P47 has two heavy servos in the tail.

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