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Calculating Watts on an existing setup

Old 05-28-2019, 09:23 AM
  #1  
HvNDhF
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Default Calculating Watts on an existing setup

Good Morning All.

I am from South Africa and don't have a watt meter available.

I was wondering if one could calculate the watts on an existing setup?

The reason being I have bought a Seagull Challenger but the set up that came in it is waaayyyy too much.

I want to change the Challenger to a Nitro set-up and possibly get a nice plane to run off this electrics.

Motor: 500 kV (Can't remeber the make)
ESC: 80Amp Hobbywing
Battery: 5000C 22.2 6Cell Gen Ace.
Prop: 13 x 10

The watts will help me to know what size and weight I can go.

Thanks in Advance.
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Old 05-28-2019, 11:44 AM
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solentlife
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Saving everyone Googling the Challenger ... can you list the specs of the model ?

Span, length, weight to fly ?

Seagull Sellers usually list suitable power plants for their models and unlike some - are usually correct.

Is this the model ?

http://www.airtekhobbies.com/seagull5500004.html


Here it says its a '46' size model ..... so any good 40 - 50 2 stroker or up to 60 4 stroker ...
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Old 05-28-2019, 11:54 AM
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HvNDhF
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I do apologize..

Wing area: 542.5 sq.in
Approximate flying weight: 2.3-2.7kg.
Length: 116cm.
Recommended engine size: 46-.55 cu.in for 2-stroke or 0.52-.62cu.in for 4-stroke.
Wingspan: 155 cm

I do however not require the power plant for the challenger.

I want to know what size plane will I be able to fly with the electric set up mentioned in my first post.
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Old 05-28-2019, 12:40 PM
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solentlife
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Can you read the numbers on the E motor ?

For example - I have 4250 at 500KV ... 5050 at 450kv .... 2826 at 2200kv .... as examples.

If you have a 5050 at 500kv and 6S LiPo ..... that will fly most models up to about 5kg depending on wing area. Possibly more in terms of large area / low loading.

A good item to use : eCalc - propCalc - the most reliable RC Calculator on the Web

With this - you can input the motor etc and play around with model data or VV ...
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Old 05-28-2019, 12:54 PM
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HvNDhF
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It shows 4120C / 500KV?

I will look at the calculator as well.

The reason I want to swap it out is because the CG of the plane is completely wrong.
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Old 05-28-2019, 04:08 PM
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solentlife
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For general .. if you do not know brand of motor ... then find the size / KV based in RCTimer or Turnigy listings ... they are general run of the mill power jobs.

FYI - There actually is no direct Fuel to E motor as the variations are too numerous. Some will try to convince you there is - but really, there is no direct relation.
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