stunthanger.com
Engine basics => Engine set up tips => Topic started by: Allen Eshleman on May 01, 2017, 07:16:39 PM
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I am wondering if a Thunder Tiger Pro 25 RC can be made to run well for stunt. Any comments appreciated.
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(https://www.picclickimg.com/d/l400/pict/132053715209_/Thunder-Tiger-PRO-25-engine.jpg)
Search For OS 25 FSR & Magnum 25 Pro , here . mw~ mw~
http://stunthanger.com/smf/rat-racing-and-team-racing/magnum-asp-venturis-back-in-stock/
Thesellfit . i usedaFox 19 / 25 schneurle C/L intake whitlled downamil.to fit. Itbigga.
Ittsableedyballrace 25FP . CLONE .
(http://sceptreflight.net/Model%20Engine%20Tests/Magnum%2025%20Pro%20page%201.jpg)
(http://sceptreflight.net/Model%20Engine%20Tests/Magnum%2025%20Pro%20page%202.jpg)
Will Go FOREVER on reasonable fuel . A old Tornado 10 x 6 worn down 9 1/2 worked well , with a 7.25 mm fox intake & Taipan spray bar ,
that leaked air ! Sealing it stuffed up the run ! . Figure it was a ' emulsification jet ' set up . !
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runs great in a wet 2 , and makes huge power, both the ball bearing and plain bearing versions
randy
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Do they use the same NVA as FP and LA?
How are they in comparison with FP and LA?
Are they good Fox 35 replacements?
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What fuel works with them?
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Do they use the same NVA as FP and LA?
A wise man would drill the case & spot face it , for ' central ' nva , If he didnt have a fox intake & taipan NVA that leaked so it burbled superbly .
How are they in comparison with FP and LA?
Freer Spinning .
Are they good Fox 35 replacements?
When youve done a touch & go on the Concrete resivoir when its blowing ( trike gear ) and the downforce trims the prop , yea . S?P
The Phantom which was a Bjornwall Mustunt , 50 in. wing , weighed 47 Oz . tho I usually used 55 Ft of .018 regularly flew in 18 Kt plus winds,
even in a 30 knot. though this isnt really ' relaxing '. It chewed about 10 gallons of whatever you tipped in it , and Still Goes .
It got up to 50 Oz and had a few lawn clippings stuck to it , so I gave it a ' quick wipe ' with a rag & petrol , which took most of an hour ,
as it had got a bit sluggish .
It NEEDED the Tornado Black 9 x 4 wind over 18 Kts, to stop acting like a teathered seagull . Would tow 67 ft of .016 in the calm , tho a bit slack .
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Theres a load of tripe on it in the N - 30 thingo .
(http://stunthanger.com/smf/index.php?action=dlattach;topic=41658.0;attach=250095;image)
I think the secrete here was the whole fuel load was inboard of the needle , so youd set it so it didnt go dry overhead -
lower you went , richer it got .
The 36 Oz I - Beam suckers'd have to be ideal . I used a K&B 3.5 muffler can with one outlet bunged nailed on , usually .
A Toungue strangled it a bit . You get a bit marginal at times , so you learn energy conservation , timing & S m o o t h
flying ,
so it teaches you a lot .
Id think a toothpick 10 x 5 , like a Master black thing , about right . But any 9 , or 10 trimmed if it bogs down , worth trying .
The black tornado 9 x 6 & 9 x 4 would be ideal , when it blows a bit thereabouts .
The First Run on my motor was lean on a 40 Deg. day . :P Id though ' thats buggered it ' as it had loosened off a bit .
Its a bit looser still after 10 Gals plus , some ' running in ' which we learned has METAL POLISH rather than Extra Castor ,
Which probly did it the least good .
SO , its the Matchless / A.J.S. 350 , of Stunt Engines .
NOW YOU KNOW > mw~ .
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Thanks to all of you. I missed buying a new one on Ebay. It went for $27.50. I tried the last 30 second bid but still got outbid. That's the way it goes.