Trainer for my O.S. 25? - RC Groups
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Nov 05, 2006, 10:53 AM
Registered User

Trainer for my O.S. 25?

I have an unused OS .25 and I want to buy a nice trainer for it.
So I’ve searched the Internet and found three options:

First the: Ripmax trainer 30
Wingspan: 1330 mm

Secondly the: Seagull Jumper 25
Weight: 1400-1700 gram
Span: 1380mm

Thirdly the Graupner Trainer 25
Weight: 1950 gram
Wingspan: 1380mm

Does anyone have some flight experiences with one of these planes?
On this forumsite some people say that the Jumper 25 won’t fly easy…… that true?
The third option will not be my choice because it is already too heavy in weight.

At this moment I’m flying a 19 years old Westerly 2000 Trainer (Jamara).
This Plane fly’s great! Well powered, very stable flying characteristics and easy to land!
Weight 1640 gram
Wingspan: 1498mm
O.S. 32 engine

Hopefully some one can give me some tips for the O.S .25 engine…
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Nov 05, 2006, 11:04 AM
If you're willing to build a kit you can find a Jr. Falcon or Falcon 56 (both by Carl Goldberg) on E-Bay occasionally. Either of these will fly with a .25 and both are great beginner or second beginner planes.
Nov 05, 2006, 11:27 AM
Master of the Figure "9"
hogflyer's Avatar
Jr. Falcon is 1/2A - with a span of 38" it was designed for .049 power, and it'll be way over powered.

Falcon 56 will be under powered - it should have at least a .35 if not a plain bearing .40 which is more that adequate.

Sig Seniorita or LT-25 may fit the bill. For that size engine, you may also want to consider scratch building - look at the plans selection offered by RCM or Model Airplane News - there are a lot of good designs in their plans selection.

Nov 05, 2006, 02:22 PM
Registered User



Nice hint!!!!!
The SIG KADET LT-25 really is a good idea!
span:1600mm = 63 inch
weight 1810 gramm = 4 lbs

Or the Senorita......

More hints are more than welcome.
Last edited by Pedro#1; Nov 05, 2006 at 02:28 PM.
Nov 05, 2006, 02:48 PM
Registered User
Maineiac63's Avatar
The Seniorita is a really sweet airplane - I wouldn't shop any longer.
Nov 05, 2006, 03:55 PM
Registered User
The Carl Goldberg Freedom 20 is an excellant plane with the 25. Can be tame and aerobatic with a higher throw rates.
Nov 05, 2006, 08:29 PM
I've owned a Falcon 56 with an OS MAx .25 and it flew fine. I replaced the OS Max 25 with an OS MAx 35 and it was almost overpowered.
Nov 05, 2006, 09:27 PM
Registered User
Sig Seniorita or LT-25

I just completed a Seniorita and installed a O.S 26 4-stroke. It is a wonderful plane, however it only a three channel. If you want a four channel go for the Lt-25. Anyway, I couldn't have asked for a better basic trainer.
Nov 05, 2006, 09:32 PM
Ascended Master
Sparky Paul's Avatar
Great Planes PT-20 is also a good trainer.. excellent instruction manual.

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