I just received an email from Mr Royce Lin at Thunder Tiger in China asking about the popularity of Club 40 racing. Thunder Tiger is considering discontinuing production of the 40 Pro and replacing it with a newly developed engine. Needless to say, I immediately responded requesting that they continue production of this excellent value in an engine.

It is possible that this "winding down" of the 40 Pro line is why we have seen 46 parts in 40 cases in the hobby shops. They may have run out of 40 parts

I would like to suggest a "media blitz" from all Club 40 and 424 racers to Mr Lin.

Send emails of support for the engine to: [email protected]

Here is the email that I just received from him and my reply:



Dear Gary,


We are not sure if this email address still works for you, and hope this email can find you well.


I have some questions those are important for all flyers who loves club 40 racing.

May I know how many flyers are still in this race?

So that we can decide to discontinue the Thunder Tiger Pro-40 or develop a brand new one.


Few years ago, Pro-40 was exclusively engine for the race, but now the race has Super Tiger GS-40, too.

As the manufacturer of Pro-40, our responsibility is much less.


Looking for your reply.


Best Regards

林崇安 / Royce Lin
總經理室 / G.M. Office
雷虎科技 / Thunder Tiger Corp.
Tel：+886-4-23591616 Ext.：814
Fax：+886-4-23590400
Email：[email protected]
Website：www.thundertiger.com




Mr Lin:

Thank you for your message.

It is VERY important that you do not discontinue the Thunder Tiger 40 Pro engine. The Club 40 racing event is becoming more and more popular with each passing year. Also, the TT 40 Pro is the only engine officially used in AMA event #424 "Sport Quickie" racing. I am not aware of the use of the Super Tigre GS-40 in any official or provisional event here in the United States. It is possible that the ST GS-40 is used in other countries but not here.

Recently, several Thunder Tiger engines have been found for sale in hobby shops that are labled as TT 40 Pro engines but have been found to contain parts from the TT 46Pro. This may be due to the factory deciding to reduce inventory in preparation for discontinuing the 40Pro. This situation has created a big problem here in the US because the purchaser of the engine believes that he is getting an engine that he can use in racing events, only to find that he has purchased an "illegal" engine with too much displacement.

This fall, there will be the first Club 40 "National Championship" race. It is attracting a large number of entries. Also, a recent Club 40 race at a local field had 20 entries. The event is growing larger each year.

Your 40 Pro engine is a very popular engine and is a great value for the money. I believe that to change it or to discontinue it and replace it with a new engine would be a mistake. You will have development costs associated with any new engine but you have already covered the development costs of the 40 Pro.

Please continue the production of the TT 40Pro.

I would be pleased to be able to answer any additional questions that you may have.

Sincerely,
Gary James
AMA CD 68845