New 200cc - 250cc Ultimate

[rodnei]

	Quote: Originally Posted by toc pilot
	Well........ you are talkling about 2 things here and they are both related to each other. Cooling and runinig too lean. If you engine 'was' lean it will run hot. If it was lean and running hot than this can cause your engine to sieze. Your airframe may provide sufficient cooling under normal 'non-lean' runs but it is hard to tell. The best senerio and the safest mode to operate in is to have lots of cooling. Was your engine lean? I watched the video and to me it did sound a bit lean and a little peaked on the RPMs. BUT understand I was not there and it is hard to hear everything with a trained ear through a video. In my opinion, it may be neccessary to adjust your engine from factory settings because you may be running the engine under different conditions/temperatures/humidity/density altitude, etc. On the 3W-275 motor it is easy on the ground to know when the engine is running rich, I recommend turning out the high side needle until the engine is definatley (4) cycling on the ground, this way you know the engine is rich.... from there, shut the engine off, move the needle 'in' 1/8th of a turn and try it agian..... continue to do this until the motor stops 4-cycling and has good power. Obviously, if you turn the needle in and you ave less rpm then you are probabbly lean! With a new engine you want to be on the rich side until you have a few hours on the engine to help the motor break in. Another way to verify your engine is set to the rich side is to put your model in a slight dive to gain more airspeed. As the motor unloads the motor will turn more RPM as it does this if the motor starts to 4-cycle agian then you are still safe and rich. Other issues that can cause your engine to seize: Not running correct oil:gas ratio. My opinion on your engine was that you flew the airplane with the motor set a little too lean. This caused the motor to get too hot and sieze. Recommend you look at your cooling baffles and make sure you have plenty of cooling and the baffles are done correctly. Then, make sure your motor is set correctly before flying, yes you may have to adjust the needles on the ground before flying. Make sure NOT to get the motor too hot whil sitting on the ground adjusting. I normally do this step with the cowling off the airplane with many people to help hold the airplane. BH

Hey Bill, thanks for help me whit for sure ill proced like that and i hope so everthing will be good
Best regards , Rodnei Senhoreti

[rodnei]

	Quote: Originally Posted by snap a saurus
	I adjust the 275 the same way Bill described, cowl off, I start rich and work my way to on the rich side, had 2 of them.

Hey Elie its very nice heard somenthing from you i really apreciate you guys trying to help me and one moore time thanks for the decal Snap Saurus and the very great time we had togheter on gardner huckfest, for sure next year ill be there again

Regards
Rodnei Senhoreti

[rodnei]

	Quote: Originally Posted by kevinf2501
	I agree. I have been flying the Yak with the 3W275 and started out pretty rich and lean it out a touch each flight. The performance is great and its still spitting out the black stuff. Hope you have better luck the second time around.

Hey,
For sure ill follow the tip from BH and i hope so everthing gonna be rigth im really apreciate for the help, for sure ill let you guys know on my second time

Regards
Rodnei Senhoreti

[SveinErikRiis]

	Quote: Originally Posted by toc pilot
	I agree! There is nothing wrong with Chinese built airplanes...... the airplanes I have built in China for sale here in the US and the rest of the world are built to 'my' standards and not to China's standard. I have spent several years working close with the Chinese builders to educate them in building light-weight, strong models. Could these planes be built lighter: ABSOLUTLEY. But as a manufacturer, I have to have the airplanes built for the general public that may not have the same skills I do and a little more strength is added in (weight) to withstand the occasional non-Bill Hempel landing. lol. Customers need to shop around becasue there anre many different levels of quality when purchasing an ARF. Buyer beware. Good luck! Hopefully in a few weeks I will be able to post some pictures of my new Chinese manufactured 240-275cc Ultimate 20-300. Bill Hempel

Hello Bill

I wonder why you are going to put a 275 in a Ultimate that is just 5" bigger in wingspan than the H9? Is it because it is a lot heavier? I have a H9 Ultimate with a 157 CS and its not underpowered. And the 275 is almost twiece the weigth.
I dont critisise you, just wonder.

Happy flying.

[SveinErikRiis]

	Quote: Originally Posted by Blazing Wings
	Tikka, There's certainly nothing wrong with the Chinese planes, as 90%, if not more, of R/C planes are coming from China. Don't blame the engine failure on the plane. If you buy a plane in Europe or USA, or anywhere else I can guarantee you it will come from China. Allthough you can get a China worst built plane, if people trying to save money on purchasing, or you can get a top quality built plane if wanting to spend the extra dollar. Unless you scratch build in your workshop you wont have a China made plane. And not to forget all the r/c accessories, like receiver, transmitter, batteries, all that is in your plane is coming from China. 50% of our household products are coming from China.

Hello

Tikkas plane was 32 kg before gas and smokeoil was put in. That is way too heavy for that plane.
I was thinking about buy my the same plane, but after Tikka was done with his plane, i did not want such a heavy plane.

Happy flying.

[toc pilot]

	Quote: Originally Posted by SveinErikRiis
	Hello Bill I wonder why you are going to put a 275 in a Ultimate that is just 5" bigger in wingspan than the H9? Is it because it is a lot heavier? I have a H9 Ultimate with a 157 CS and its not underpowered. And the 275 is almost twiece the weigth. I dont critisise you, just wonder. Happy flying.

This is a good question!!!
I can tell you that your 150cc 'not-underpowered' Hanger 9 Ultimate would not be competitive in the TAS inv-class based on your power. This is not an insult to you or your airplane, just a statememnt about the different levels of power needed for doing aerobatics. Your airplane may not be underpowered based on your flying style or the types of manuevers that you are performing. But power-to-weight performance needed: varies greatly based on the style of flying you do. The new Ultimate I have designed will be very light weight based on its size and the 275 engine may seem like more CC's than needed, but it is what is needed to be truely competitive in the Unlimited or Invitational classes. Will this airplane fly on a 200cc motor, yes. Will it perform loops, yes. Will a 200 cc engine work: not competitivley for 'worldly competition'.

The BH Ultimate is a 275cc sized airplane and it will have balistic power while maintaining the lightest wing loading possible. This whole airplane was designed with the 275cc motor in mind and was designed to be the smallest package with the most power avialable. It may only be 5" bigger in WS but that is a very big difference in the whole overall size of an airplane!!

Take a look at the Aeroworks Ultimate: WS of 94". This is 9" smaller WS that the Hanger 9, why did they make this airplane so much smaller than the H9 with the same engine requirement? Power to weight!

Well, I hope I have answered your question! Bi-planes have drag, we need LOTS of HP!!



Bill Hempel

[Chewie]

Hi..first post

Ive been wanting an Ultimate since starting to fly and thought a large scale electric would be perfect. Anyone have experience with large scale electric please chime in.

Perhaps BW Avicomp to keep the weight down...what size would be best? thx for your help.

Chewie